glutamate-GABA Archives - everywomanover29 blog

Do you drink diet sodas or use other sugar free products that contain aspartame? Or did you when you were younger? New research has found aspartame induces anxiety and fear via changes in glutamate-GABA signaling. What is even more concerning is that these effects are transgenerational, meaning you could be living with the anxiety-provoking effects of aspartame via the diet soda habits from your father and his father/your grandfather. This study found it impacts 2 generations via the paternal line but I suspect ongoing research may yet find impacts via your mother and grandmother too. Also, keep in mind, your current or prior use of aspartame is very likely going to impact your children and grandchildren. It’s an animal study but we don’t want to ignore yet another issue with artificial sweeteners.

The good news is that we can use the amino acid GABA to help counter the high glutamate and low GABA, and ease this physical anxiety this imbalance causes. And we can use GABA and glutamine and other amino acids to break the addiction to aspartame and other artificial sweeteners.

Here is the abstract of the paper – Transgenerational transmission of aspartame-induced anxiety and changes in glutamate-GABA signaling and gene expression in the amygdala

We report the effects of aspartame on anxiety-like behavior, neurotransmitter signaling and gene expression in the amygdala, a brain region associated with the regulation of anxiety and fear responses. C57BL/6 mice consumed drinking water containing 0.015% or 0.03% aspartame, a dose equivalent of 8 to 15% of the FDA recommended maximum human daily intake, or plain drinking water. Robust anxiety-like behavior (evaluated using open field test and elevated zero maze) was observed in male and female mice consuming the aspartame-containing water. Diazepam, an allosteric modulator of the GABA-A receptor, alleviated the anxiety-like behavior. RNA sequencing of the amygdala followed by KEGG biological pathway analysis of differentially expressed genes showed glutamatergic and GABAergic synapse pathways as significantly enriched. Quantitative PCR showed upregulation of mRNA for the glutamate NMDA receptor subunit 2D (Grin2d) and metabotropic receptor 4 (Grm4) and downregulation of the GABA-A receptor associated protein (Gabarap) mRNA. Thus, taken together, our diazepam and gene expression data show that aspartame consumption shifted the excitation-inhibition equilibrium in the amygdala toward excitation. Even more strikingly, the anxiety-like behavior, its response to diazepam, and changes in amygdala gene expression were transmitted to male and female offspring in two generations descending from the aspartame-exposed males. Extrapolation of the findings to humans suggests that aspartame consumption at doses below the FDA recommended maximum daily intake may produce neurobehavioral changes in aspartame-consuming individuals and their descendants. Thus, human population at risk of aspartame’s potential mental health effects may be larger than current expectations, which only include aspartame-consuming individuals.

A few notes to highlight:

Aspartame caused anxiety in both male and female mice but the intergenerational effects were along the paternal line i.e.“the anxiety phenotype, its response to diazepam, and changes in amygdala gene expression were transmitted from the aspartame-exposed male founders to their descendants.”
These effects were caused by the equivalent to 2–4 small /8 oz/ 240 ml cans of aspartame-sweetened diet soda.
The anxiety-inducing effects of aspartame in humans are potentially far more widespread than what is currently known

There is still no consensus on adverse effects

The paper also highlights a very concerning aspect: there is still no consensus on aspartame’s effects on brain monoamine content (serotonin and the catecholamines dopamine, adrenaline, and noradrenaline) or behaviors such as memory, depression and anxiety. Despite much research, consensus is also still lacking on aspartame’s carcinogenic or cancer-causing effects and the impacts on weight-gain and obesity, and the bad effects on the microbiome.

In fact, “the US government policy and publications indicate that aspartame is safe when consumed within FDA recommended maximum daily intake value of 50 mg/kg.” In this study it was much less than the maximum i.e. the equivalence of just “8 to 15% of the FDA recommended maximum human daily intake” caused the above anxiety and intergenerational effects.

This paper is adding to the body of knowledge but if you’re still consuming aspartame it is time to make your own decisions and quit. This is often easier said than done and I address this below.

GABA and other amino acids as a solution for your diet soda addiction

I address the addictive nature of diet soda in this blog: I need help with my Diet Coke addiction – when I stop, my fatigue, brain fog, anxiety/depression increase big time!

I need help with my Diet Coke addiction. I have been using it for 35 years and I am too appalled to tell you how much I drink.

I have tried to quit many times and ended up in utter failure. When I stop, my fatigue, brain fog, anxiety/depression increase big time. I know this drink is literally killing my health and I am desperate for some answers, suggestions….or a miracle.

Kevin shares this in the comments: “I was VERY addicted to diet coke and Pepsi. I found oxycontin and morphine easier to quit.” And Karen shares this: “I can relate to a Coke/Pepsi (diet and/or regular) addiction because I drank 3 every day, Monday-Friday for years. For me, that first sip in the morning was my “hit” in the morning for this teetotaler.”

When it comes to using amino acids to help break the addiction, pretty much everything I write about in relation to sugar addiction or cravings would also apply to quitting Diet Coke or other diet sodas. You need to figure out what emotions are driving your addiction and use the respective amino acid supplement/s (one or more of them) to help break the addiction and improve your anxiety and mood symptoms at the same time.

This could be glutamine if you drink it when your blood sugar is low and crave the sweet taste, GABA if you drink it when stressed, tryptophan or 5-HTP if you drink it later in the day in order to feel happy, DPA if it’s your reward and tyrosine if it gives you a mood and energy boost. It’s all explained in the above blog post.

The amino acids ease alcohol withdrawal symptoms too. I share a study in this blog – An amino acid supplement with DLPA, glutamine and 5-HTP eases alcohol withdrawal symptoms at an inpatient detoxification program – and practical solutions using these amino acids. Read this and simply substitute alcohol with diet soda. And keep in mind it’s always an individualized approach based on each person’s needs, for endorphin and dopamine support (from the DLPA), blood sugar support (from glutamine) and serotonin support (from 5-HTP).

GABA as a solution for the physical anxiety symptoms

In this study the mice responded well to diazepam, a benzodiazepine prescribed for anxiety. However, given the many issues with long-term benzo use, the amino acid GABA, used as a supplement is a safer choice. It also addresses the root cause of low GABA and high glutamate.

The FDA approved aspartame as a nutritive sweetener in 1981 and for use in carbonated beverages in 1983 so I don’t have the intergenerational impacts. I drank Tab in my early 20s and it contained aspartame for a short time. It was very likely part of the perfect storm of factors that contributed to my anxiety. GABA was a life-saver for me.

Here are a few blog posts on using GABA for easing physical anxiety and fears:

Be sure to use the search feature to find other similar articles on the blog.

Resources if you are new to using amino acids as supplements

If you are new to using GABA or any of the other amino acids as supplements, here is the Amino Acids Mood Questionnaire from The Antianxiety Food Solution (you can see all the symptoms of neurotransmitter imbalances, including low GABA and low serotonin).

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, self-medicating with alcohol and more.

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. You can find them all in my online store.

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 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.

Did you drink diet sodas in the past or do you still consume them or other products that contain aspartame?

Do you suspect they may be one root cause of your anxiety? And has stopping helped?

Did GABA help ease your anxiety and fear? And help with breaking the addiction and quitting? What about other amino acids like tyrosine, glutamine, tryptophan/5-HTP or DPA (d-phenylalanine)?

What about suspected intergenerational impacts from your parents and grandparents?

Feel free to post your questions and feedback in the comments below.