Depression

Red light therapy for back and neck pain, plantar fasciitis and low mood – a complement to the amino acids GABA, DPA and tryptophan

April 3, 2026 By Trudy Scott Leave a Comment

I had to share this with you about my experience with red light therapy. I do not have a Lumebox but purchased a larger device (Red Rush 400) over a year ago from Red Therapy Company after reading a recommendation from Ari Whitten. At the time, I had very painful plantar fasciitis with a heel spur on my left foot that did not respond to an injection.

Because I walk 3-5 miles every day, it was breaking my heart not to be able to walk and I was desperate to find a solution. I placed the bottom of my feet 4-6 inches from the device 10 minutes a day. To my absolute amazement, I noticed the difference in just the first week of using the device and within 2 weeks I was back walking 3-5 miles!

Because we sold our house and moved to Texas recently and are currently living in our 5th wheel RV (hoping to do some traveling) I had not been using my red light device. I developed a very bad pain in my neck and upper back recently (I have degenerative discs) that wouldn’t respond to NSAIDs for 2 weeks.

So I got out my Red Rush 400 and after the first day I started noticing relief which would last about 2 hours. Encouraged, I kept it up 10 minutes a day on each side (front and back) twice a day and within a week the pain was gone. I am sooo amazed how well this works. I’m so grateful to have found this therapy.

Thank you for all you do.

Katherine, a 72 year old woman in the community, sent me this wonderful red light feedback after one of my emails about the Lumebox red light device, and gave me permission to share her success story.

Read on to learn about the research supporting red light therapy for pain, low mood and plantar fasciitis; the two red light devices I own and how I use them, plus the pros and cons of each; amino acids for pain relief and low mood: GABA, tryptophan and DPA; and additional resources if you need guidance using the amino acids.

Red light therapy for pain relief

In case you’re new to red light therapy (or RLT), it’s also known as photobiomodulation (or PBM) or low level laser therapy (LLLT).

This 2021 paper, Low-intensity LASER and LED (photobiomodulation therapy) for pain control of the most common musculoskeletal conditions reports that

There is evidence that photobiomodulation therapy reduces pain intensity in non-specific knee pain, osteoarthritis, pain post-total hip arthroplasty, fibromyalgia, temporomandibular diseases, neck pain, and low back pain.

In this updated paper they confirmed the benefits of red light therapy reporting:

profound biological effects on tissue including increased cell proliferation, accelerating the healing process, promoting tissue regeneration, preventing cell death, anti-inflammatory activity and relief of pain

They also provide good reasons for using opioids at the “lowest effective dose for the shortest period possible”, i.e. adverse effects that include: “poor coordination, sedation, mood swings, depression, and anxiety combined with a dependence on the drugs.”

Red light therapy for low back pain and a mood improvement

In a small study published in 2018, A case control series for the effect of photobiomodulation in patients with low back pain and concurrent depression, the authors report that the participants saw a mood improvement while using red light therapy while doing physical therapy:

This preliminary investigation suggests that an antidepressant effect may result from photobiomodulation (PBM) to the back and thighs in patients with low back pain and concurrent depression.

The authors mention a possible mechanism – NIR and red light used on “large areas of the skin” (like the back and the back of the thighs) “might significantly affect systemic processes such as a slow metabolism, inflammation, and oxidative stress.”

The paper also includes this statement about photobiomodulation being “an FDA-approved treatment for somatic pain …based on the boosting of ATP production by near infra-red (NIR) or red light…” due to mitochondrial support. They also share that “depression has been linked to a decreased level of mitochondrial respiration in blood platelets.”

The authors do acknowledge this was a preliminary finding but what is fascinating is that photobiomodulation may improve mood even when it’s not used directly on the skull.

They also call this a multi-modal approach for pain and low mood, which I fully support i.e. the use of red light therapy in conjunction with dietary changes, exercise, physical therapy, acupuncture and amino acids such as GABA, tryptophan, tyrosine and d-phenylalanine. They don’t mention the amino acids but I share more about these below.

Red light therapy for plantar fasciitis

A meta-analysis presents evidence that red light/photobiomodulation therapy “is an effective treatment modality to reduce pain and improvement of foot function in adults with plantar fasciitis.” They do state that there is a broad discrepancy in the way studies are done for this condition – so you will also see some studies that state it doesn’t help and that it may help pain but other approaches are needed too (which makes sense).

My experience with the Red Rush 400 (panel)

I own the same red light panel – the Red Rush 400 – that Katherine used with success, and I love it. I use it primarily for back and neck pain too – I do 10 minutes at a time when I’m having an issue and also after a weight session at the gym. I’m also learning about the value of doing a daily session at least once a day for better skin health, energy improvement and better sleep.

What I love about this device:

it covers a large area i.e. from my neck down to my lower back
it’s very easy to use
it uses EMF Blocking Cage Technology and has an automatic timer

The negatives are:

the price (it costs more than the Lumebox)
it’s very heavy – it hangs on a door but can be easily winched higher or lower as needed
it’s not portable

If you are wanting to purchase this red light panel, I do have an affiliate account with Red Therapy Co and have arranged $100 off each order if you use the code TRUDYREDTHERAPY at checkout.

Purchase the Red Rush 400

I’m sharing about this panel and the Lumebox (below) because I have vetted the products and have first-hand experience with them. I’ve also started receiving other wonderful feedback from my community and will continue to share as more success stories come in.

My experience with the Lumebox device (handheld)

I also own a handheld Lumebox red light device and I love it.

I use it daily, often instead of the panel because it’s so versatile. It comes with us on all our trips and I use it on my feet after a hike or when my restless feet are affecting my sleep (my oxalate issues means I have fickle and tender feet!). I also used it recently on my low back after sitting on bad chairs at a wedding. I’m amazed with the pain relief after just one 10 minute session!

It worked wonders for recovery after a recent fall on my knee – fortunately no broken bones, just bruising and a soft tissue injury. I did use arnica, RICE and amino acids too (GABA and DPA) and saw a physical therapist, but was surprised by how quickly it healed

My hubby uses it more and more and my mom-in-law uses it often on her neck and wrist for osteoarthritic pain.

What I love about this device:

it’s portable and versatile (and can be used on targeted areas – like on my knee, my feet, neck, jaw etc)
it’s very easy to use and can be recharged relatively quickly
it’s low EMF too and also has an automatic timer
it’s very affordable for what you get

There is only one negative I can think of:

waiting for it to recharge (only an issue when hubby, mom-in-law are queued up to use it after me)

I also have an affiliate account with Lumebox where you can save $260 off each order when you use my partner link below. No code is necessary and there are other bigger discounts during special sales throughout the year.

Purchase the Lumebox

I do want to mention that the Red Rush 400 panel and Lumebox handheld device were not actually used in the above studies but participants were exposed to both NIR and red wavelength light, at the same levels that are found in these devices (NIR 850nm and red 660nm).

Amino acids for pain relief and low mood: GABA, tryptophan and DPA

I support a multimodal approach to pain relief and the amino acids are the perfect complement to red light therapy

GABA helps with pain relief when there are spasms and muscle tension (caused by low GABA levels). GABA and GABA/theanine cream can be especially helpful at times.
Tryptophan helps with pain relief (and low mood) that is caused by low serotonin levels
DPA (d-phenylalanine) helps with pain relief that is caused by low endorphins. With low endorphins you may also experience emotional pain and weepiness

I’ve blogged extensively about the amino acids and pain so be sure to search the blog with ‘GABA pain’, ‘tryptophan pain’, ‘5-HTP pain’ and ‘DPA pain’ for more about this if you’re new to this aspect. You’ll read many of my own stories about using amino acids for an ankle sprain, rectal spasms/pain, IBS belly pain/spasms and more.

Additional resources when you are new to using amino acids as supplements

As always, I use the symptoms questionnaire to figure out if low GABA or low serotonin or low endorphins and other neurotransmitter imbalances may be an issue.

If you suspect low levels of any of the neurotransmitters and do not yet have my book, The Antianxiety Food Solution – How the Foods You Eat Can Help You Calm Your Anxious Mind, Improve Your Mood, and End Cravings, I highly recommend getting it and reading it before jumping in and using amino acids on your own so you are knowledgeable. And be sure to share it with the practitioner/health team you or your loved one is working with.

There is an entire chapter on the amino acids and they are discussed throughout the book in the sections on gut health, gluten, blood sugar control (this is covered in an entire chapter too), sugar cravings, anxiety and mood issues.

The book doesn’t include product names (per the publisher’s request) so this blog, The Antianxiety Food Solution Amino Acid and Pyroluria Supplements, lists the amino acids that I use with my individual clients and those in my group programs.

If, after reading this blog and my book, you don’t feel comfortable figuring things out on your own (i.e. doing the symptoms questionnaire and respective amino acids trials), if you need serotonin support, the Serotonin QuickStart Program is a good place to start. This is a paid online/virtual group program where you get my guidance on using tryptophan and 5-HTP safely, and community support during 5 LIVE Q&A calls. You can sign up to be notified when the next live launch of this program is happening. We take a deep dive into product options including Lidtke products and others if you’re not able to access Lidtke.

Low GABA can cause physical tension and overwhelm, affect sleep and cause stress eating. If you also have low GABA symptoms, the next step to get help is the GABA QuickStart Program. This is also a paid online/virtual group program where you get my guidance and community support. Another option is the budget-friendly GABA QuickStart Homestudy Program.

Wrapping up and your feedback

I’m thrilled Katherine saw these benefits with red light therapy and I always appreciate feedback from the community and being able to share it on the blog.

Now I’d love to hear from you

Have you used red light therapy with success and which device do you have? How often do you use it?

Have you seen an improved mood with red light therapy too?

And have you used any of the above amino acids to help with pain relief too?

If you’re a practitioner do you recommend red light and amino acids for pain relief? Have you had clients report an improved mood with red light therapy too?

The amino acid glutamine improves low mood by addressing gut health, and it has calming effects too

October 3, 2025 By Trudy Scott 2 Comments

Recent research has shown that the amino acid glutamine can positively affect gut health by supporting the gut microbiome, gut mucosal wall integrity, and by modulating inflammatory responses.

As modulated by the vagus nerve, via the enteric nervous system, the gut-brain connection can impact the brain’s neurochemical environment. Poor gut health can disrupt the balance of neurotransmitters, which can result in neuropsychiatric based conditions such as depression.

Glutamine supplementation may provide significant adjunctive nutritional support in cases of depression by promoting proper gut health and function.

The above is an excerpt from the paper, The role of glutamine in supporting gut health and neuropsychiatric factors, published in 2021.

The authors do note the fact that glutamine is a “fundamental precursor to the most prevalent neurotransmitters, GABA and glutamate.” This is why glutamine supplementation can be calming for many individuals and may sometimes be too stimulating for some folks. It also highlights the importance of biochemical individuality and why it’s important to find your ideal dose (more on that below).

I appreciate their call for more research on glutamine, “as well as studies which could explore using glutamine in concert with other supportive amino acids, such as GABA and tyrosine, in an effort to restore neurotransmitter equilibrium” (more on that below too).

Read on below to learn more about how glutamine directly supports gut health and what harms the gut; how to know if glutamine will be calming or too stimulating, and how much to use; and other clues that you may benefit from glutamine; and additional resources when are new to amino acids such as glutamine, GABA and others.

How glutamine directly supports gut health and what harms the gut

From the above paper, glutamine:

1) has a positive impact on sustaining the balance of the gut microbiome
2) increases the expression of tight junction proteins and the integrity of the intestinal lining (i.e. it heals leaky gut)
3) helps to minimize the inflammatory response in situations of gut mucosal irritation (i.e the inner most lining of the digestive tract).

The authors also discuss all of the many factors that are harmful for the gut: highly processed foods, refined sugars, saturated fat, and minimal healthy fatty acids and antioxidants; lack of probiotics and prebiotics; blood sugar swings; stress and high cortisol; medications and alcohol consumption. Much of this is addressed in my book “The Antianxiety Food Solution”

It’s well-worth reading the entire paper for a full understanding of the two-way gut-brain connection via the vagus nerve and the role of the microbiome when it comes to neurotransmitter production and much more.

How to know if glutamine will be calming or too stimulating, and how much to use

As mentioned above, the authors share that glutamine is a precursor to GABA, a calming neurotransmitter i.e. it is often calming.

Glutamine is also a precursor to glutamate and can be too stimulating for some, typically when very high doses are used.

The paper mentions studies that “observed the effects of glutamine supplementation used at doses of between 15 g and 30 g,” however my recommendation is to start low and slowly increase based on your unique need. I have clients and those in my programs start with 500 mg once a day and increase to 1-3 x 500 mg, up to 3 or 4 times a day.

The only way to know if it will be calming or stimulating is to do a trial alone i.e. with no other new supplements, and carefully track the effects.

I also find using glutamine powder and holding it for 1-2 minutes on the tongue is more effective and less is often needed. This has additional benefits of stopping intense sugar cravings in their tracks (more on this below).

Other clues that you may benefit from glutamine: symptoms of low blood sugar

As mentioned above, glutamine helps reduce intense sugar cravings, and prevents low blood sugar (which can actually cause anxiety and panic attacks). This aspect is not mentioned in the paper but addressing low blood sugar is yet another application of glutamine when it comes to anxiety and low mood.

Here are all the symptoms we see with low blood sugar:

Crave sugar, starch or alcohol any time during the day
Irritable, shaky, headachey – especially if going too long between meals
Intense cravings for sweets
Lightheaded if meals are missed
Eating relieves fatigue
Agitated, easily upset
Nervous, anxious, panic attacks

And here are some other blog posts that illustrate some of the above:

Together with low serotonin and low GABA, addressing low blood sugar is one of the most effective approaches I use with clients to help ease anxiety. We achieve this with the use of glutamine and by controlling blood sugar by starting the day with a breakfast that includes quality animal protein.

We may also use tyrosine if there are low dopamine symptoms and d-phenylalanine if there are low endorphin symptoms, in an “effort to restore neurotransmitter equilibrium.”

Additional resources when you are new to using glutamine, GABA or tyrosine, or other amino acids as supplements

We use the symptoms questionnaire to figure out if low blood sugar (indicating a possible need for glutamine) or low GABA (indicating a possible need for GABA or theanine) or low dopamine (indicating a possible need for tyrosine) or other neurotransmitter imbalances may be an issue for you.

If you suspect low levels of any of the neurotransmitters and do not yet have my book, The Antianxiety Food Solution – How the Foods You Eat Can Help You Calm Your Anxious Mind, Improve Your Mood, and End Cravings. I highly recommend getting it and reading it before jumping in and using amino acids on your own so you are knowledgeable. And be sure to share it with the practitioner/health team you or your loved one is working with.

There is an entire chapter on the amino acids and they are discussed throughout the book in the sections on gut health, gluten, blood sugar control (this and glutamine is covered in an entire chapter too), sugar cravings, anxiety and mood issues. The importance of quality animal protein and healthy fats is also covered.

If, after reading this blog and my book, you don’t feel comfortable figuring things out on your own (i.e. doing the symptoms questionnaire and respective amino acids trials), a good place to get help is the GABA QuickStart Program (if you have low GABA symptoms too). This is a paid online/virtual group program where you get my guidance and community support.

If you need serotonin support, the Serotonin QuickStart Program is a good place to get help. This is also a paid online/virtual group program where you get my guidance on using tryptophan and 5-HTP safely, and community support during 5 LIVE Q&A calls. You can sign up to be notified when the next live launch of this program is happening.

If you are a practitioner, join us in The Balancing Neurotransmitters: the Fundamentals program. This is also a paid online/virtual program with an opportunity to interact with me and other practitioners who are also using the amino acids.

Now I’d love to hear from you…

Has glutamine helped you with your leaky gut, low mood and/or offered calming effects?

What about intense cravings for something sweet or irritability and poor focus? And other low blood sugar symptoms?

How much do you find helps? And do you use powder or capsules?

Are you interested in a program to learn more about the safe and effective use of glutamine and/or tyrosine?

Feel free to share and ask your questions below.

The correlation between terrible anxiety/panic attacks and collagen

July 25, 2025 By Trudy Scott 16 Comments

Bea shared her collagen experience and insights on one of the collagen blogs:

I discovered the correlation between terrible anxiety and collagen myself several years ago! Couldn’t find any data about it then so just assumed I was a weirdo. But then my 26 yr old daughter started having terrible panic attacks. And bam! She too had started a collagen supplement! So I realized at least 2 ladies have this trouble! Got me to think about how many women seek anti-aging help with collagen and then also end up on prescriptions to help calm terrible anxiety without seeing the connection. Practitioners don’t seem to know about this. But every vitamin shop I visit hears from me on the anxiety/collagen connection. Perhaps grassroots word of mouth will help others eventually.

And yesssss… for me, bone broth is equally horrible!! Even if it is simmered for only 30 mins.

Thank you for explaining, Trudy!! How fascinating to learn it’s the drop in serotonin! I’ve never tried Tryptophan… just a bit nervous. But I think it’s time. I sure need the bone broth for my waning gut health. And I’m weary of ruminating thoughts lately! Thank you immensely for shining a needed light on how these amino acids help! I only wish I could share lunch with you and pass along my grateful hug!

God bless you, Trudy!

I’m so glad Dea found this correlation for herself and her daughter! Collagen use is on the rise and there is little awareness about these effects on serotonin levels in susceptible individuals. Read on for many of the anti-aging benefits of collagen, more information about tryptophan depletion studies, another similar story, other possible causes, and other blog resources on this topic.

Collagen use as we age: for skin, joints and bone health

Her comment about an increase in collagen use for anti-aging is so true. This 2023 paper, Collagen supplementation in skin and orthopedic diseases: A review of the literature, discusses the many age-related benefits of collagen:

hydrolyzed collagen supplementation promotes skin changes, such as decreased wrinkle formation; increased skin elasticity; increased hydration; increased collagen content, density, and synthesis, which are factors closely associated with aging-related skin damage.

Regarding orthopedic changes, collagen supplementation increases bone strength, density, and mass; improves joint stiffness/mobility, and functionality; and reduces pain. These aspects are associated with bone loss due to aging and damage caused by strenuous physical activity.

This paper mentions these aspects about collagen, that it’s low in tryptophan and that it is not a complete protein i.e. it’s a low biological value protein:

Notably, collagen is a low-tryptophan protein, an essential amino acid for humans.
Collagen is a source of conditionally essential amino acids (glycine and proline), which are important in some physiological situations.
Collagen is a low biological value protein, since its amino acid composition is poor in essential amino acids. However, it has a positive intrinsic value because its amino acid composition is equivalent to that of human connective tissue.

This supports what we have learned from acute tryptophan depletion studies causing low serotonin.

Tryptophan-depletion studies to study the relationship between low serotonin and depression

Here is my first blog explaining acute tryptophan depletion studies (published in 2017) – Collagen and gelatin lower serotonin: does this increase your anxiety and depression?.

Tryptophan-depletion studies have been done for years, as a way to study the relationship between low serotonin and depression. Often a tryptophan-deficient amino acid mixture is used for this purpose. More recently, collagen and gelatin are being used.

Collagen and gelatin are an excellent source of these amino acids: proline, glycine, glutamine and arginine, but they do not contain the amino acid tryptophan.

This paper, Pharmacokinetics of acute tryptophan depletion using a gelatin-based protein in male and female Wistar rats summarizes what we find in a number of studies that use gelatin for the purpose of lowering serotonin levels, in order to study the relationship between serotonin and behavior:

The essential amino acid tryptophan is the precursor of the neurotransmitter serotonin. By depleting the body of tryptophan, brain tryptophan and serotonin levels are temporarily reduced. In this paper, several experiments are described in which dose and treatment effects of acute tryptophan depletion (ATD) using a gelatin-based protein-carbohydrate mixture were studied in male and female Wistar rats.

I encourage you to read the above blog to learn about who may be more susceptible to these effects.

I also share my personal experience with collagen consumption and can totally relate to Bea’s story and what clients and those in my community have shared.

Toni used collagen for 8 months – anxiety and panic attacks are off the charts

Toni experienced something similar:

I’ve been using Organic collagen for about 8 months now… love the hair and skin results. My tummy felt better at first but not currently. My anxiety and panic attacks are off the charts: panic attacks, heart racing, sweating, brain fog. I want to escape – like fight or flight. Definitely obsessing and fears. Memory difficulty. I have an upcoming GI appointment to check for Candida /SIBO… but I had no idea this could add to my anxiety. I’ll be looking forward to more information, Seriously.

And a few weeks after stopping the collagen she shared this:

I stopped using collagen. Since then, my anxiety and panic have decreased by less than half. Mild in comparison. I’m definitely taking a long break.

Instead of stopping collagen altogether, my advice is to figure out if low serotonin is the cause and address this with tryptophan or 5-HTP so collagen can be used for its many anti-aging and health benefits.

Is their anxiety due to reduced serotonin or histamine, glutamate or oxalate issues

Keep in mind tryptophan will help and allow collagen, gelatin and broth to be consumed without the increase in anxiety and panic attacks (and sleep issues) only if it is due to low serotonin.

Presumably both Dea and her daughter have other low serotonin symptoms – in addition to anxiety and panic attacks – such as sleep issues, worry, fears, afternoon/evening cravings etc (here is the list of symptoms). As you can see from Toni’s feedback (above), she does have many low serotonin symptoms.

A trial of tryptophan and symptom reduction (initially until the ideal dose is found) will confirm symptoms are related to low serotonin very quickly. This will also help Dea with her nervousness and ruminating thoughts, help her daughter ease the feelings of panic and help Toni too.

It’s also often helpful to also rule out histamine, glutamate and oxalate issues from collagen, gelatin and broth intake – as all of these factors can contribute to an increase in anxiousness too.

Additional blog posts on the topic of collagen

In case you are new to these potential issues, here are additional blog posts on the topic:

If you are new to this topic and are still skeptical about all this, do read the many comments and stories on these blogs. It’s a way more common issue than you’d think!

Additional resources when you are new to using tryptophan and other amino acids as supplements

As always, I use the symptoms questionnaire to figure out if low serotonin or other neurotransmitter imbalances may be an issue.

If, after reading this blog and my book, you don’t feel comfortable figuring things out on your own (i.e. doing the symptoms questionnaire and respective amino acids trials), a good place to get help is the GABA QuickStart Program (if you have low GABA symptoms). This is a paid online/virtual group program where you get my guidance and community support. You can sign up to be notified when the next live launch is happening.

Wrapping up and your feedback

I appreciate Dea for sharing her story on the blog and for sharing this information at vitamin stores – we do need more awareness, hence this new blog on the topic to further help create awareness.

It’s very likely that this is one big contributing factor to the rise in anxiety and sleep issues in perimenopause and menopause. And this is probably made worse because so many practitioners are still not aware.

I thanked her for her kind words, and said I’ll take a virtual lunch and a virtual hug from her.

Have you experienced any adverse effects from collagen, gelatin or bone broth?

Have you been able to continue using them by adding tryptophan?

And why do you use collagen/how is it helping?

If you’re a practitioner are you aware of this issue for certain susceptible individuals?

Feel free to share and ask your questions below.

[NEW] D-Phenylalanine (DPA) powder for boosting endorphins: improve mood, reduce comfort eating and ease pain

May 30, 2025 By Trudy Scott 30 Comments

D-Phenylalanine (DPA) is an amino acid that destroys the enzyme that breaks down endorphins. Endorphins are feel-good chemicals that you experience with an endorphin rush when you go for a run or when someone gives you a big hug, when you show kindness to someone or someone does something nice for you. Taking the amino acid DPA, as a supplement helps to boost your endorphins in order to improve mood, reduce pain and cravings or comfort-eating.

I’ve recommended the Lidtke Endorphigen product (500mg DPA) to my clients and community for many years, and wrote about it in my book and on various blog posts. Because product formulations have shifted and capsules changed, I’ve revised my recommendations over the years. I’ve suggested swallowing a capsule, then suggested chewing the capsule (when the company used gelatin capsules and clients saw quicker results than swallowing the capsule) and then suggested opening the capsule and tipping the contents on to the tongue (when the company switched to vegan capsules).

I then also started recommending Doctor’s Best D-Phenylalanine 500mg as another option and because many in the community didn’t like the taste and texture of the Lidtke product (more on that below). This product has now been discontinued.

The purpose of this blog post is to announce a new product: D-Phenylalanine (DPA) powder and share my current recommendations on the use of DPA for endorphin support. And some examples and feedback (from clients and my personal experiences too) in case you’re new to this amino acid and low endorphins.

Lidtke Endorphigen with 500mg D-phenylalanine (capsules)

Here is the new label for the Lidtke Endorphigen with 500mg D-phenylalanine. As you can see it also contains vitamin B2 and vitamin B6. The latest version now contains arrowroot flour as a filler.

This product has been a firm favorite of mine for many years and the formulation has shifted over the years.

Last year I did a taste difference blog on Lidtke Endorphigen and Doctor’s Best D-phenylalanine – Lidtke Endorphigen vs Doctor’s Best D-phenylalanine: the taste difference and endorphin boosting benefits for mood and cravings

Many of my clients (and myself included) describe the opened DPA (from capsules) as a dark-chocolate bitter like taste that is not unpleasant. However, about half my clients don’t particularly like the taste of DPA and one woman in my community, Ali, was ready to give up on the Lidtke Endorphigen product because of the taste. I suspect it was the B vitamins that she didn’t like.

Oh goodness. If I open the Endorphigen on my tongue, it’s just awful. I might be able to get 1/4 of it but that’s it. And the taste stays there for at least an hour. No sense of chocolate in there for me. Isn’t that interesting that you and others like the taste. I consider myself pretty open to whatever needs to be done but wow, this is almost no way.

I reached out to Lidtke sharing the taste issue and the above blog post, and asked if they would be willing to offer a DPA only product and suggested a powder.

Lidtke appreciated the fact that I shared your taste issues and feedback, and my request for a powder-only product of d-phenyalanine/DPA has come to fruition.

Doctor’s Best D-phenylalanine has been discontinued, so this is great news taste-wise and for a number of other reasons (listed below)!

The brand new Lidtke D-Phenylalanine (DPA) powder

Here is the label for the brand new Lidtke D-Phenylalanine (DPA) powder. As you can see it’s only DPA – no added B vitamins or fillers.

Here are the advantages of DPA in powder form:

A capsule opened on to the tongue offers mood and pain benefits so why not simply use the powder instead
Fewer capsules to swallow
Fewer digestive issues the cellulose of vegan capsules are not tolerated (I’m hearing more and more feedback about this)
Convenient for kids and older adults who may have problems swallowing capsules
A pleasant dark-chocolate like taste with none of bitterness of B vitamins
Hopefully, more affordable than the capsules

My personal experience with DPA

Personally I have used DPA over the years with much success. It’s my go-to amino acid for all kinds of pain – a sprained ankle, a pulled back muscle, a tension headache (and even a headache caused by chocolate) and belly pain during an IBS flare.

I’ve also used it for endorphin support when I have not been able to exercise due to an injury. I immediately notice a subtle mood boost and a reduction in comfort-eating and carb-cravings.

I have the new Endorphigen 500mg DPA product (i.e. the capsules) and it’s helping in the same way as the previous version.

I have yet to try the new DPA (d-phenylalanine) powder myself but will report back as soon as I have had a chance to do so – on the taste, the texture and the effectiveness.

Other DPA feedback from the community

I suspect many folks who already like the Lidtke 500mg Endorphigen and find opening the capsules to be more effective, are going to like the new powder:

“I love using the DPA! I use the Lidke brand. Very helpful in improving mood and anxiety. Open on my tongue. I like the taste!” ~ Lynn
“It’s interesting to read your recommendation to open the capsule … I had just started doing that! (Already using powdered forms of other aminos) Anyone looking thru my trash might wonder what I’m up to. This method really works for me.” ~ Joan

Here are a few blog posts illustrating the use of DPA in multiple sclerosis, weepiness, physical pain, emotional pain and resilience, cravings/emotional eating and even helping to wean off prescription pain medication:

Multiple sclerosis: low endorphin research and the amino acid DPA (d-phenylalanine) for pain, depression, comfort and trauma support “The endogenous opioid system is …well known to play a role in the development of chronic pain and negative affect [i.e. depression], both of which are common comorbidities in MS.”
DPA for weepiness, pain and comfort and reward eating
The individual amino acids glutamine, GABA, tryptophan (or 5-HTP), DPA and tyrosine are powerful for eliminating sugar cravings, often within 5 minutes
When using the amino acid DPA (d-phenylalanine) I have more resilience and more buffer in the caregiving work I do, and just the oops’s of life As I mentioned above, using DPA over these holidays also gave me more resilience and the endorphin boost I needed help with the emotional pain of losing my mom.
Wean off prescription pain medication, improve sleep and reduce emotional eating with DPA (an endorphin-boosting amino acid)

Be sure to use the search feature on the blog to find additional applications of DPA.

Additional resources when you are new to using DPA, tryptophan, GABA, and other amino acids as supplements

As always, I use the symptoms questionnaire to figure out if low endorphins or low serotonin or low GABA or other neurotransmitter imbalances may be an issue.

If, after reading this blog and my book, you don’t feel comfortable figuring things out on your own (i.e. doing the symptoms questionnaire and respective amino acids trials), a good place to get help is the GABA QuickStart Program (if you have low GABA symptoms). This is a paid online/virtual group program where you get my guidance and community support.

Wrapping up and your feedback

My current recommendations for endorphin support are as follows:

Lidtke Endorphigen with 500mg D-phenylalanine – capsules swallowed
Lidtke Endorphigen with 500mg D-phenylalanine – capsules opened on to the tongue and held in the mouth 1-2 minutes
Lidtke D-phenylalanine powder – on to the tongue and held in the mouth 1-2 minutes (assuming it works as well as Endorphigen)

Now I’d love to hear from you – how has DPA helped your mood, cravings and pain?

Have you used Lidtke Endorpigen 500mg or Doctor’s Best D-Phenylalanine in the past – capsules swallowed or opened on the tongue? Have you had any issues with the taste or texture?

Are you interested in trying the new Lidtke D-Phenylalanine powder?

If you’re a practitioner do you use DPA with your clients/patients?

Feel free to share and ask your questions below.

Exploring the Therapeutic Potential of Gamma-Aminobutyric Acid (GABA) in Stress and Depressive Disorders through the Gut–Brain Axis

January 31, 2025 By Trudy Scott 4 Comments

Research conducted on individuals with depression reveals that major depressive disorders (MDDs) coincide with diminished levels of the inhibitory neurotransmitter γ-aminobutyric acid (GABA) in the brain, as well as modifications in the subunit composition of the primary receptors (GABA_A receptors) responsible for mediating GABAergic inhibition.

Furthermore, there is substantial evidence supporting the significant role of GABA in regulating stress within the brain, which is a pivotal vulnerability factor in mood disorders. GABA is readily available and approved as a food supplement in many countries.

Although there is substantial evidence indicating that orally ingested GABA may affect GABA receptors in peripheral tissues, there is comparatively less evidence supporting its direct action within the brain.

Emerging evidence highlights that oral GABA intake may exert beneficial effects on the brain and psyche through the gut–brain axis. While GABA enjoys wide consumer acceptance in Eastern Asian markets, with many consumers reporting favorable effects on stress regulation, mood, and sleep, rigorous independent research is still largely lacking.

Basic research, coupled with initial clinical findings, makes GABA an intriguing neuro-nutritional compound deserving of clinical studies in individuals with depression and other psychological problems.

This is the abstract from a recently published review paper: Exploring the Therapeutic Potential of Gamma-Aminobutyric Acid in Stress and Depressive Disorders through the Gut–Brain Axis

Does GABA exert calming and mood benefits via the gut-brain axis or is it really just a placebo effect? This paper discusses both possibilities. I’m excited by the former (and share more about this below) but I do not agree with the latter. Based on my clinical and personal experience, the calming effects of the amino acid GABA, used as a supplement (when you have low GABA symptoms/levels and used in a very specific way), is not a placebo effect. I also discuss this and share some cases that clearly confirm there is no placebo effect. Read on to be enlightened and encouraged about the power of GABA.

GABA and the microbiota-gut-brain axis

The authors describe the microbiome-gut-brain axis as “the bidirectional communication between the gastrointestinal tract, including its resident microbiota and the brain, linking emotional and cognitive centers of the brain with peripheral intestinal functions.”

They acknowledge that while we don’t quite understand the exact mechanisms of this bidirectional communication, “the vagus nerve, the endocrine and immune system, and the synthesis and metabolism of metabolites and neurotransmitters in the gut are critically involved.” This is exciting given what we know about the blood brain barrier.

If you are new to this concept of the gut-brain axis or want to read some of the latest updates, I encourage you to read the paper and learn about the benefits of probiotics (such as Lactobacillus and Bifidobacterium, and Lactococcus, Enterococcus, Streptococcus, and Leuconostoc) and prebiotics i.e. psychobiotics; and fermented foods – for mood improvement and stress reduction.

You’ll read this about GABA (both as a metabolite produced by the microbiome and as a supplement):

found in the enteric nervous system it contributes significantly to gut-brain axis functions and related disorders, including depression, anxiety, inflammatory, and cardiovascular disorders (they refer to GABA as a crucial ‘postbiotic’ i.e. a metabolite produced by the microbiome)
while GABA may not directly cross the blood-brain barrier in humans, an indirect influence through the enteric nervous system could potentially provide a viable pathway for the impact of GABA dietary supplements
although the connection between oral GABA administration i.e. GABA supplementation, the vagal nerve, and GABA levels in the brain has not been firmly established, considering the existing evidence, it represents a promising avenue for future research.

The last two bullets are worth emphasizing because one of the most common myths is that “GABA supplements don’t work because GABA is too big a molecule to get across the blood brain barrier.” It really doesn’t need to get through the blood brain barrier in order to be calming.

I share more about this in a blog I published in 2023 – you can read it here.

GABA is a lifesaver and helps with mycotoxin-induced anxiety

Joie has Sjogren’s, Hashimoto’s, fibromyalgia & collagenous colitis (all diagnosed after severe mold exposure) and shares how GABA

has been a life saver for me (for my anxiety), and I share this with all I know who experience anxiety. I also use L-theanine at night because of insomnia. The 5-HTP has helped somewhat for sleep. L-tryptophan didn’t seem to make a difference. However the 5-HTP has made a significant difference in lessening my daily pain levels, which I am most grateful for.

Micki Contini, MS CNC, a board-certified holistic health and nutrition consultant, is a friend and colleague whose life was hugely impacted by mold toxicity. She shares this about how GABA helped her:

As they started tearing my house apart for remediation, I started eating GABA Calm like candy. At the beginning I had to have a lot more than I do now. GABA Calm takes me down a notch and I feel my shoulder coming away from my ears and I get closer to relaxing.

Here are a few other blogs that illustrate just how calming GABA can be when used as a supplement:

If GABA works it’s a placebo effect?!

I find this statement in the conclusion of the review to be confusing given all that the authors share about the gut-brain axis, vagus nerve and bidirectional communication:

The dietary supplement form of GABA is readily accessible to consumers. While many individuals assert that they derive advantages from using these products, it remains uncertain whether these supplements provide benefits beyond what could be attributed to a placebo effect.

Their argument about conflict of interest and small sample sizes when it comes to studies doesn’t hold water with me.

As I mentioned above, based on my clinical experience, the calming effects of the amino acid GABA, used as a supplement when you have low GABA levels (and used in a very specific way), is not a placebo effect.

The following two cases clearly confirm there is no placebo effect (and these are just a few of many which I plan to share with the authors).

My 6 year old was having panic attacks getting out of the car for Kindergarten

My 6 year old son was having panic attacks getting out of the car going to Kindergarten and taking two GABA Calm has completely relieved him of his fears. He has been going for 3 straight weeks in a row.

I thought it may be low serotonin since this happened last winter as well but I gave him 5-HTP for a couple months and it didn’t seem to affect him and his anxiety. We had to have him repeat Kinder this year.

But wow, the GABA has been fabulous and Kindergarten is in full swing because of your help.

Lisa, a mom in the community, shared these wonderful results about her son. This is most definitely not a placebo effect.

You can read the entire story on the blog here. The school is actually in shock at how well carpooling is going for him.

GABA lessens anxiety, agitation and defiance in 98 year old mother who has been “sundowning” for a couple of years

My mother is 98 and has been “sundowning” for a couple of years. It starts around 3pm, sometimes earlier. Some days it’s no big deal. It is on those other days when she starts and then it goes to anxiety, agitation, then she can get sort of defiant which is so not her. She is a gentle soul, friendly, and kind so this is difficult on her as well as our family.

I just started to use my pestle and mortar to crush up a 125 mg GABA CALM supplement (Source Naturals) and I mix a little into her flavored yogurt when I start to see her having difficulty. I give it to her throughout the day. She only gets the 125 mg amount so I feel safe with that.

I believe that I do notice it lessens her anxiety. I pray that this will be helpful for her because that anxiety can be really draining for her. I have not noticed any adverse reactions.

This is another heartwarming success story shared by Marsha who used GABA Calm with her mother. It’s yet another one that is not a placebo effect either. You can read the entire blog post here.

My personal GABA results are also not a placebo effect

I can also share from first-hand experience that GABA was a life-saver for me in my late 30s when I had no idea what a panic attack was and knew very little about GABA other than the fact it calmed me down very quickly!

I still use GABA in various situations to this day: to help with back spasms after a fall, to help with rectal spasms, to help with throat spasms/pain caused by crying (after the loss of my darling mom), to help me sleep solidly and before doing an on-stage presentation, and much more.

GABA is effective and safe when used in a very specific way

Many people use GABA and report it didn’t work or that they had a strange or uncomfortable reaction to their GABA supplement (such as tingles or flush or feeling dizzy). I’m on a mission to educate folks how GABA is effective and safe when used in a very specific way:

Only if you have low GABA levels and symptoms of physical tension, overwhelm, fears, anxiousness, stiff and tense muscles, stress eating, drinking to calm down or fit in socially (you can see all the symptoms here)
Starting with a low dose of around 125mg (and less if you’re sensitive)
Only using it as a sublingual, powder or capsule opened on to the tongue, liposomal or GABA cream (to see results in 1-10 mins and to bypass the digestive system)
Titrating up (and sometimes back down) to find the ideal dose for your unique needs
Being open to trialing different products and forms and sometimes combining GABA with theanine
Understanding that there can be nuances to using GABA, making one change at a time and not giving up too soon
Tracking carefully and course-correcting as needed

I educate anxious individuals about all of the above and offer guidance and encouragement in the GABA Quickstart 2.0 online group 5 week program.

I hope this summary, the review paper and the cases leave you feeling enlightened and encouraged about the power of calming GABA.

Additional resources when you are new to using GABA and other amino acids as supplements

As always, I use the symptoms questionnaire to figure out if low GABA or other neurotransmitter imbalances may be an issue.

If, after reading this blog and my book, you don’t feel comfortable figuring things out on your own (i.e. doing the symptoms questionnaire and respective amino acids trials), a good place to get help is the GABA QuickStart Program (if you have low GABA symptoms). This is a paid online/virtual group program where you get my guidance and community support.

Wrapping up and your feedback

Have you experienced the benefits of GABA for stress and/or low mood? Do you believe it’s more than a placebo effect?

And are you excited to understand the possible mechanisms and read the research? Or do you just want to know how GABA could help you and how to use it?

Have you tried GABA without success or only had limited success? Feel free to share and I’ll provide my feedback.

Feel free to ask your questions below.

Berberine in perimenopause and menopause: improving mood, calming the anxious mind, and improving heart health, blood sugar and bone health

May 10, 2024 By Trudy Scott 15 Comments

… Berberine, an isoquinoline alkaloid derived from plants of the generis Berberis, has been recognized as being capable of decreasing oxidative stress, LDL, triglycerides, and insulin resistance and of improving the mood. This review describes the cellular and clinical effects associated with the use of berberine, which suggest that this molecule could be an effective natural supplement to ensure a smooth peri- and postmenopausal transition.

The above is from a paper published in 2015, Potential benefits of berberine in the management of perimenopausal syndrome.

These are just a few of the many benefits of berberine. Other research reports impacts on the microbiome, benefits for bone density and kidney health – all very relevant in perimenopause and menopause.

I feel that berberine may be a nutrient to consider, in addition to dietary changes, stress reduction and lifestyle changes, and targeted individual amino acids. Read on to discover some of the mechanisms and the benefits of using a comprehensive approach, and feedback from folks in the community who are using berberine with success.

Impacts on oxidative stress, blood sugar/insulin resistance, lipids and heart health, and mood

I encourage you to read the full paper in order to get an overview of the impacts on oxidative stress, blood sugar/insulin resistance, lipids and heart health, and mood. Here is a very high level summary:

Estrogen deficiency, increased cardiovascular risk, an “overproduction of reactive oxygen species (ROS)” and reduced nitric oxide (NO) which are important contributing factors when it comes to “menopause-related endothelial dysfunction, atherosclerosis, hypertension, cardiovascular, and renal diseases.” Berberine counters this via various mechanisms.
Type 2 diabetes is higher amongst menopausal women, causing high blood sugar and insulin resistance. This paper shares a study that found berberine “significantly lowered fasting blood glucose (FBG), hemoglobin A1c, triglycerides, and insulin levels in patients with Type 2 diabetes as well as metformin and rosiglitazone.” One way berberine does this is via “increased insulin receptor (InsR) messenger RNA and protein expression.”
“inactivity of LDL receptor (LDLR)” in liver cells leads to higher levels of oxidized LDL, a risk factor for “endothelial dysfunction and atherosclerosis.” One mechanism is that berberine improves LDLR expression and has lipid-lowering activity.
When it comes to mood issues, the increased oxidative stress, immune dysfunction and inflammation play a role because of “interactions between neurotransmitters, neuropeptides, oxidative and nitrosative stress, and cytokines.” Higher levels of inflammatory markers such as interleukin-6 (IL-6), C-reactive protein, interleukin-1-beta (IL-1β), and TNFα “can enter the brain and may cause alterations of the metabolism of serotonin and dopamine.” Berberine helps to counter this inflammatory cascade and “inhibits the expression of MAO” , increasing norepinephrine, serotonin, and dopamine – and improving mood and presumably reducing anxiety too.

Berberine benefits menopause — From: Potential benefits of berberine in the management of perimenopausal syndrome

Feedback from folks in the community

When I shared this research on Facebook I received much in the way of positive results.

Susan shared this: “A functional medicine doctor suggested I take it with every meal. My A1C was not bad, (5.3) but my last level was 4.8. This was over the course of about 1 year.”

Becky shared this: “I used it for about 6 months along with diet changes to drop my A1C. Have been holding steady since with dietary measures alone. I didn’t realize berberine also helped lower LDL. Mine is slightly elevated. Not enough that my traditional MD has called me on it, but I’ve adjusted my diet again and hearing this about berberine I think I’ll try going back on it.”

Liz shared this: “I had gained some caregiver weight so started on berberine twice a day and it was helpful. However my Doc quickly had me switch over to [a combination product with berberine, chromium and alpha lipoic acid] and it’s fabulous! Twice a day and I feel great, my carb cravings are at bay and my bloodwork and overall health has vastly improved in just a few months.”

Marcy shared this: “Yes!! My son had been steadily gaining weight from binge eating and medications. In October 2022 his triglycerides were through the roof and I was so worried about his health. I put him on 500 mg of Berberine twice a day. Fast forward to today, he has lost approximately 50 pounds and his triglycerides are normal. There were other factors that may have contributed to the weight loss such as therapy and more structured eating times, but I absolutely believe the Berberine supported all this!” (this was also a combination product with berberine and a small amount of alpha lipoic acid and grape seed extract)

Marcia shared this: “I’ve used Berberine for appetite suppression, which it seems to help with, though not enough for me to lose any weight. But it did also actually lift my mood, which I was not expecting.”

Berberine: the microbiota, the gut-brain connection and anxiety

The number of studies on berberine is impressive and growing by the day. It’s not discussed in the above paper, but this paper, Effects of Berberine on the Gastrointestinal Microbiota states this: “The mechanism underlying the role of berberine in lipid‐lowering and insulin resistance is incompletely understood, but one of the possible mechanisms is related to its effect on the gastrointestinal microbiota.” Given what we know about the gut-brain connection, this is another likely mechanism for mood and anxiety benefits.

In another paper, Berberine ameliorates ovariectomy-induced anxiety-like behaviors by enrichment in equol generating gut microbiota, the authors propose that the use of berberine “modulates the gut microbiota, stimulates equol production, and improves anxiety-like symptoms” … “suggesting a direct link between gut microbiota modulation and estrogen deficiency-induced anxiety.”

Berberine: osteoporosis and the kidneys

An osteoporosis study shows that berberine regulates “the estrogen and thyroid hormone signaling pathways to treat osteoporosis in a multi-target, multi-pathway, and multi-system manner.”

And berberine used in conjunction with calcium carbonate and vitamin D, helps to prevent drug-induced bone loss too: “berberine inhibits bone resorption and improves bone formation to prevent glucocorticoid-induced osteoporosis.” I’d be considering vitamin K and other approaches like working towards optimal homocysteine, addressing food sensitivities, addressing possible oxalate and gallbladder issues too. The latter are more common during and after perimenopause.

Interestingly berberine also improves kidney health. One study reports that berberine “significantly ameliorated chronic kidney disease by altering the composition of the gut microbiota and inhibiting the production of gut-derived uremic toxins.”

A comprehensive approach that includes amino acids

As I mentioned above, I feel that berberine may be a nutrient to consider, in addition to dietary changes, stress reduction and lifestyle changes, and targeted individual amino acids. Berberine is relatively new to me and not covered in my book “The Antianxiety Food Solution” but it’s a great resource for the rest.

Here are are few blog posts specific to amino acids in perimenopause and menopause:

The good news is that the amino acids provide immediate relief while the berberine is slower-acting and starting to have an impact.

Product recommendation: Thorne Berberine

There are many good berberine products available. I did some reading and research and landed on Thorne Berberine.

It is available from my online store (Fullscript – only available to US customers – use this link to set up an account) and it’s available via iherb (use this link to save 5%).

If you’re new to berberine, be sure to discuss the research and if it may be something to consider with your practitioner.

Additional resources when you are new to using amino acids as supplements

As always, I use the symptoms questionnaire to figure out if low GABA or other neurotransmitter imbalances may be an issue.

Wrapping up and your feedback

I do always appreciate feedback from the community and being able to share it on the blog.

Now I’d love to hear from you – have you used berberine with success? How much have you used, which product and how has it helped?

Were you aware of all these benefits?

Have you also used amino acids and dietary approaches as you start to see hormonal shifts?

If you’re a practitioner do you berberine with your clients/patients?

And please let me know if it’s helpful that I’m now including product recommendations and where to get them.

Feel free to share and ask your questions below.