Too much of the calming amino acid, GABA, can cause the opposite effect leading to increased anxiety and feeling too tired the following day, sometimes even feeling drugged. I have clients start with 125mg if they have low GABA physical type of anxiety so when I hear someone has had a bad reaction after using 500mg GABA, it’s unfortunate but not surprising. SM posted her reaction on the blog where I write about a niacin-type flush from using too much GABA. However her reaction was more severe than this. Here is her feedback and questions:
I took a single dose of GABA 500mg from NOW foods one night hoping it can help with anxiety and insomnia. I felt on high alert that night and increased anxiety that night. The next day I felt drugged and anxious, but strangely slept better [the next] night. I also had itchy red bumps.
I realized from your blog that 500mg was too much for me. I switched to NOW Foods True Calm which has 200 mg GABA and other nutrients, quite like a mini version of the Country Life GABA. I slept better but again have itchy red bumps now, so I’m afraid of using another capsule during the day.
I am also on 0.375mg of Clonotril which I take only at night but it does not help with constant anxiety all day. I managed to taper down to 0.375mg from 1mg after taking magnesium glycinate but unfortunately I had too much diarrhea from the magnesium. That’s how I came to know about GABA hoping it can help relieve the constant anxiety and heart palpitations.
After reading this article I realize it’s important to start GABA low. I tried to use Olly Goodbye Stress gummies which have 100 mg GABA and 50 mg theanine per 2 gummies but it was of no help.
I want to try the Source Naturals GABA Calm lozenges you recommended but I’m also feeling scared as I have been trying so many things without much success. Very grateful if you could offer me some advice. I came across your work when googling about GABA. Thank you for this opportunity to ask you questions.
This is my feedback for SM: too much GABA can have adverse effects the day it’s taken and feeling on high alert with increased anxiety that night is not unusual. It’s also not unusual to feel overly fatigued and even experience a drugged-type feeling and still continue to feel anxious.
With symptoms like this my first piece of advice is to start low at 125mg and always have 1000mg vitamin C on hand when trialing GABA (and any of the amino acids). It’s the antidote and works quickly to ease all the adverse effects and also any beneficial effects that are experienced.
Use a much lower dose of GABA and keep vitamin C on hand
We often trial GABA again – even with adverse symptoms like this – but always use a much lower dose.. We could use another product like Source Naturals GABA Calm lozenges or use 125mg of the 500mg NOW GABA product.
One big clue that she may actually need GABA is that she did sleep better the next night.
If it’s a niacin type flush, as described in the blog she commented on, Too much GABA causes a tingling niacin-like flush sensation (in the brain and body). It’s awful and very uncomfortable!, I would still recommend another trial of the lower dose (with vitamin C on hand).
Other product options to consider are theanine and/or pharmaGABA too.
A histamine reaction or MCAS /mast cell activation syndrome?
However if it’s not a flush but a real rash or hives then I’m more concerned and would not have them trial something new. With a rash that doesn’t resolve we also consider a histamine reaction or MCAS /mast cell activation syndrome.
GABA typically helps with MCAS/histamine issues but unfortunately things are not predictable when you have MCAS. She may need to address the histamine/MCAS reaction before she can start benefiting from GABA.
A phenol sensitivity or allergic reaction?
Phenols can trigger some strong emotional reactions that do include anxiety, hyperactivity, insomnia and meltdowns – and a feeling of being on high alert (which SM mentions).
Since she mentions the rash, I would also want to rule out a phenol reaction to the GABA. My colleague Julie Matthews shares this: “When phenols are not able to be broken-down and detoxified by a process called sulfation… they can cause these emotional symptoms and also red cheeks and ears.”
The benzodiazepine may be the confounding factor
One other confounding factor is the Clonotril. Benzodiazepines (using them and/or tapering) can cause many different issues. I do have clients use GABA to help while tapering but we only change one thing at a time and the benzo taper is super super slow. They also only start to taper (with the doctor’s approval and monitoring) once they are nutritionally stable. My book The Antianxiety Food Solution is a great resource for learning more about becoming nutritionally stable.
Serotonin support as well as GABA support?
SM mentions that she took GABA hoping it would help with anxiety and insomnia. These are also both symptoms of low serotonin so she may also see benefits with tryptophan, 5-HTP and melatonin. You can read more about tryptophan here: Tryptophan for the worry-in-your-head and ruminating type of anxiety and melatonin here: Melatonin improves sleep quality and reduces anxiety after a TBI.
Resources if you are new to using GABA and other amino acids as supplements
If you are new to using any of the 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.
Have you had an adverse reaction to taking a high dose of GABA? What dose, which product and what was your reaction?
What did you figure out was the ideal dose for you?
If you have questions please share them here too.