allergy

How the correct approach, dose and sublingual use of GABA can be calming and not cause a flushed and itchy face and neck

October 10, 2025 By Trudy Scott 12 Comments

I started GABA 750mg and think it gently chills out my anxiety a bit, however 20 minutes after I take it, I feel flushed and itchy in my face and neck. This lasts for 5 minutes and then goes away.

I am in a migraine program with a health coach who has referenced your book several times. She recommended I stop it because it sounds like an allergy. I personally would think it would last longer if it was an allergy.

What do you think? Have you heard of this reaction before? I thought it would maybe get better as my body gets used to taking it? I wanted to continue because I think it’s helping. Thank you.

Sharon posted the above feedback about her promising calming results with GABA and her flushed/itchy question on one of the blogs. She also asked this:

Just read other posts and I’m just beginning to learn all of this info on your site. I’m also getting your book. Looks like I may have started too high? Could I open up one of my capsules and just take powder orally and then work up?

Read on below to learn more about the fact that too much GABA does cause flushing; the correct approach, dose and sublingual use of GABA for Sharon; Holly’s similar story with 750mg GABA; and GABA, serotonin and endorphin support for Sharon’s other symptoms (headaches, migraines, PMS, sleep issues and rectal spasms); plus additional resources when are new to amino acids such as GABA, 5-HTP, DPA and others.

Too much GABA does cause a flush feeling

Firstly, it’s wonderful that GABA gently chills out Sharon’s anxiety a bit. And she is correct – her flush and itchy face and neck is unlikely to be an allergic reaction. Too much GABA does cause a niacin-like flush or tingling feeling and yes, I have heard of this reaction many times. Unfortunately it leads to many people giving up on GABA when they really do need it.

Sharon shared this: “I thought it would maybe get better as my body gets used to taking it?” Unfortunately, many individuals think the same and end up pushing through the discomfort and it’s not what I advise. She was wise in exercising caution and finding out by reading more on the blog, getting a copy of my book, The Antianxiety Food Solution and asking on the blog.

I have no idea why supplement companies produce such a high dose GABA product and it’s something I caution all my clients and GABA Quickstart program participants about.

The correct approach, dose and sublingual use of GABA for Sharon

Sharon also acknowledges she probably started with too high a dose and asks about opening up the GABA capsule and working her way up. This is exactly what we need to do to get results with GABA and not cause new issues.

Some other options to opening the GABA capsule could be:

a GABA only powder
a GABA sublingual product (such as GABA Calm)
a liposomal GABA product
a GABA cream (she reported migraines and neck tension so a cream may be a good option for her too)

I also have clients start with only one amino acid product and find the ideal dose before adding the next amino acid acid. And track results carefully so they can course correct, adjusting up or down as needed.

Sharon did come back and comment a week later sharing this adjustment she had made:

So I have been opening the GABA capsule and taking half a dose (so 375mg) on my tongue in the morning and then in the afternoon. I don’t notice the real calm like I did with the whole capsule though.

She’s on the right track and the next step could be to use three-quarters of a dose twice a day and see how that helps. Another option is half a dose, maybe 4 x day. There is no one-size fits all and it’s a matter of Sharon finding what works best for her unique needs.

Keep in mind that for some individuals even 375mg is too high a dose. I typically have clients start with 125mg GABA and less if they are super-sensitive.

Holly’s story with 750mg GABA is very similar

I’ve actually blogged about this before: Too much GABA causes a tingling niacin-like flush sensation (in the brain and body). It’s awful and very uncomfortable!) and shared Holly’s niacin-like flush result when using the same dose:

I experienced the niacin-like flush when I tried to go from GABA Calm [mostly dissolved in my mouth] to a pill form and didn’t realize the dosage would be way too high all at one time. The pill was 750 mg GABA [and swallowed with food], so it wasn’t going to work well anyway.

The flush lasted about 15-20 minutes. It was awful. I was sure I was going to throw up every time.

It took me a couple of weeks to figure out the cause. My therapist recommended your website and book and those helped me understand when to take it and why it would help.

When I eliminated the 750 mg GABA pill the symptoms completely went away.

Now I stick to GABA Calm. I take one in the morning and one before bed and sometimes one midday.

You can read more about this flush feeling on the above blog and another example.

GABA, serotonin and endorphin support for Sharon’s other symptoms

Sharon also has headaches, migraines, PMS, sleep issues and rectal spasms:

I’ve got chronic headaches and frequent migraines. Other weird symptoms are lip dermatitis, hormone imbalance, PMS, and rare rectal spasms which I saw referenced on your site too. Serotonin issues too and I also recently started 5-HTP 200mg at night which seems to be helping my PMS insomnia.

It’s great that 5-HTP is helping her PMS-related sleep issues. Both GABA and 5-HTP (for serotonin support) may help with her hormone balance, which in turn, may help with her headaches and migraines too. She may also want to consider a trial of d-phenylalanine/DPA for endorphin support/pain relief. GABA itself helps to ease neck tension and headaches.

GABA does stop very painful rectal spasms very quickly. More about this here – GABA lozenge relieves excruciating pelvic floor/rectal pain and spasms within 30 seconds: a solution for proctalgia fugax.

As I mentioned above, I have clients and those in the GABA Quickstart program start with GABA and find the ideal dose before adding the next amino acid acid. For Sharon, I’d recommend that she finds her ideal dose of GABA before bumping up her 5-HTP and adding DPA.

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

We use the symptoms questionnaire to figure out if low GABA (indicating a possible need for GABA or theanine) or low serotonin (indicating a need for tryptophan or 5-HTP) or low endorphins (indicating a possible need for DPA) 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, sugar cravings, anxiety and mood issues. The importance of quality animal protein and healthy fats is also covered.

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), 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.

If you also 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…

I appreciate Sharon and Holly for sharing their experiences and asking questions. I’m hoping their stories have enlightened you!

And I am thrilled that her migraine health coach referenced my book and told her about GABA. It’s a great book that many practitioners share with their clients and patients.

Have you experienced this uncomfortable feeling when using too much GABA? And did you learn to use less in order to get the calming benefits of GABA?

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

Has serotonin or endorphin support helped too?

Feel free to share and ask your questions below.

Christmas tree phenols as a trigger for anger, meltdowns, anxiety, hyperactivity, insomnia, aggression, self-injury and autistic symptoms?

December 18, 2020 By Trudy Scott 16 Comments

Are you aware that the aromatic oils that give pine trees their wonderful smell are phenols and that these phenols may be a trigger for anger and meltdowns, anxiety, hyperactivity, irritability insomnia, self-injurious behavior, digestive issues and autistic symptoms (such as stimming, swinging and hand-flapping)? All this can be caused by an indoor Christmas tree in susceptible individuals.

My colleague Julie Matthews writes about this here: Avoiding Holiday Havoc: Healthy solutions to avoid meltdowns and keep the holidays happy

“When phenols are not able to be broken-down and detoxified by a process called sulfation, which is low in many children with autism and ADHD”, they can cause these symptoms and also red cheeks and ears. She shares that “phenolic compounds come in many forms including artificial petroleum-based food additives, and salicylates (a type of phenol) found in plants and foods like strawberries and spices, as well as pine trees.”

In the above blog, Julie shares this story about a client with a 10-year old son with autism. He severely regressed during the holidays and it was because of the Christmas tree. This is what the mom shared:

During the Holidays our son regressed severely. He became anxious, aggressive, and self-abusive. He cried and had tantrums regularly throughout the day. He couldn’t sleep anymore and was up for hours at a time, night after night. He was hand-flapping like crazy. We have a swing in the house for him and he now wanted to swing all day long, constantly, and do nothing else. He lost eye contact and he stopped responding to his name.

Once the Christmas tree was removed the improvements were dramatic:

The next day, he was much calmer. He seemed to have “exhaled.” Within 48 hours, our son was completely back to normal.

I shared Julie’s blog on my Facebook page and a father in my community shared a similar experience about his autistic son’s severe reactions to phenols:

Yes! My autistic son who is sensitive to phenols, would completely meltdown during the holidays. We thought it was just the change in routine and his environment, but quite by accident we discovered fragrances seemed to make him worse. We got rid of the fragrances and holiday tree/decor and the improvement in our son was dramatic! We now realize it was the phenols.

My son’s reaction to phenols/fragrances are bright red cheeks/ears, dark under eye circles, headaches, inappropriate manic laughter, aggression/self injurious behavior, marathon meltdowns/screaming, incontinence, insomnia/less than 3 hrs sleep a night, bumpy rashes, GI issues/diarrhea, excessive sensory stimming (hand flapping, lip licking, running around and body slamming into things.) During the holidays, the intensity of these reactions shot through the roof.

They found out by chance that it was the Christmas tree that was causing his son’s issues each year. It started when he was a toddler and they figured it was the stress and changes of the holidays that was the issue. One year they didn’t put up a tree and they could not believe the difference. It was then they made the connection and learned more about phenols and made the necessary changes.

By reducing phenols in his diet and environment, and giving him Epsom Salt baths and enzymes (No-Fenol), most of the above symptoms were significantly reduced.

I suspect there are many families who are seeing similar meltdowns and have no idea it could be the Christmas tree. Keep in mind that the reactions may not be as severe as these two cases I’ve shared here. If you are seeing any increase in anxiety, irritability, sleep problems, digestive issues or other unusual behavior changes in your child, keep an open mind that it may be more than just the holiday changes.

Julie’s advice is this:

Since so many children with autism and ADHD react to salicylates/phenols – in her nutrition practice she finds an overwhelming majority react negatively – she suggests a cautious approach to holiday decorating for all families of a child with autism or ADHD. Simply avoid the pine Christmas tree.
If you are unsure about their sensitivity to salicylates/phenols you might ask yourself if your child is often hyper, irritable, or has red cheeks, and other common salicylate symptoms, or whether they crave salicylate-rich foods such as berries, grapes, apples, and ketchup. If so, explore salicylates further.

I encourage you to read Julie’s blog to gain a better understanding of salicylates and phenols. If you are a practitioner and want to learn more about low salicylates/phenols and other special diets her practitioner training is excellent.

I appreciate this mom and dad for sharing their experiences with their sons so we can all learn and help other families. I also so appreciate Julie’s expertise in this area and really look forward to digging further into the research and picking her brain so I can share more.

Could your holiday anxiety and/or insomnia be phenol issues too?

Julie works with children with autism and ADHD but as someone who works primarily with adults with anxiety, I’m going to be exploring sensitivity to salicylates/phenols further. Julie recently shared this with me: “if you start looking you’ll probably see a lot of your clients with anxiety have phenol issues.”

If you also notice any increase in anxiety, anger, irritability, sleep problems, digestive issues or other unusual behavior changes, keep an open mind that it may be more than just the holiday stress or winter blues/winter anxiety. It may well be phenol issues too.

Serotonin connection to phenol issues

I’ll be blogging more about this and the fascinating serotonin connection to phenol issues. You may have noticed that many of the symptoms these 2 boys experienced sound a lot like either low serotonin or high serotonin (both of which can occur in autism). Serotonin is an endogenous phenol compound and this phenol issue is likely causing high serotonin.

When I asked Julie about this she shared this with me: “Yes, serotonin and dopamine are phenolic. And sulfation is important for the inactivation of dopamine and serotonin. So poor sulfation can lead to neurotransmitter imbalances.”

Using collagen to lower high serotonin?

I’ve blogged about how collagen can lower serotonin in susceptible folks and increase anxiety. It is also used by some folks to lower their high serotonin and make them calm. Misty reports using collagen ‘therapeutically’:

I use it to reduce tryptophan because I have a tendency toward high serotonin. I have suffered my entire life with ADD, tics as a child, grinding teeth, general anxiety, lack of motivation and later, IBS. In my 53 years I’ve never been as calm as I am now.

I don’t know if Misty has a phenol issue but I’m going to be exploring if collagen or gelatin could possibly be used to help lower the high serotonin and ease some of these severe phenol reactions quickly, in conjunction with other approaches like avoiding the foods and environmental exposures, enzymes and other nutrients, and Epsom salt baths.

Christmas tree syndrome, mold issues and toxic plastic trees

I hate to spoil the Christmas fun but here are a few other things to consider:

Christmas tree syndrome is also a real issue for many individuals
My friend and Enviornmental Toxins expert Lara Adler shares how mold from a real tree made her and her cat really sick “Within a few days of getting the tree, I broke out in a full-body rash that required a 10-day run of prednisone. I didn’t think it was the tree at first (it could have been something else), but then my cat, who was already dealing with GI inflammation and a gut issue developed asthma! Out of nowhere! She also ended up on prednisone. I got rid of the tree and both our symptoms never came back.”
She also shares some issues with plastic trees: they are often made from toxic PVC (polyvinyl chloride) with “softeners like lead and/or phthalates”, and often treated with endocrine-disrupting flame retardant chemicals. More about this on Lara’s blog here.

Have you observed a salicylate/phenol reaction with your child or client/patient? What about a less severe reaction with your child or with you personally?

Have the following helped you: avoiding the foods and environmental exposures like a Christmas tree, using enzymes like No-Fenol and other nutrients, and Epsom salt baths? In the midst of a very severe reaction has collagen or gelatin helped reduce symptoms quickly?

What about mold issues or allergies with a Christmas tree?

Feel free to post your questions here on the blog too.