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Does oral GABA work, and how much is in Reviralis?
Does oral GABA work? It is unclear. The source we read says nobody knows whether swallowed GABA reaches the brain, and it may cause drowsiness. On the Reviralis Complete label, GABA is 9th of 18 names in a 661 mg blend, so it holds at most 73.4 mg per serving of two capsules. The real amount is not printed.
Written by the Goreviralis label deskUpdated · 4 min read
The question01
What is GABA and why would a capsule have it?
GABA, short for gamma-aminobutyric acid, is a messenger chemical the brain makes on its own. Supplement makers add it hoping a swallowed dose will act as a calming signal.
The catch is the route. A pill has to pass the gut, enter the blood and then cross the barrier that protects the brain. The source we read says it is unclear whether oral GABA reaches the brain at all (Boonstra et al. 2015, GABA). The same source lists drowsiness as a possible effect.
So a shopper holding a bottle with GABA on it faces two open questions: does it get there, and does it do anything if it does? Public sources do not answer either one.
The evidence02
What do small GABA trials report?
Our sources describe the benefit beyond placebo as unclear (Boonstra 2015, GABA Food Supplements (Front Psychol)). We found no trial of Reviralis, and none that tests GABA at the small amount a blend position would allow.
That second point deserves a number. GABA is name number 9 in the 661 mg blend. US rules list blend members from most to least by weight (21 CFR 101.36). Nine names share at most 661 mg, so the ninth cannot exceed 661 divided by 9, which is 73.4 mg per serving. The real figure could be much lower.
| Question | Answer from the label and sources |
|---|---|
| Where is it listed? | 9th of 18 names in the blend |
| Most it can hold per serving | 73.4 mg (about 0.07 g) |
| Printed amount | Not printed |
| Does swallowed GABA reach the brain? | Unclear (Boonstra et al. 2015, GABA) |
| Tested in Reviralis itself? | No study found |
Claims03
Can GABA calm stress or help with herpes outbreaks?
We cannot say it does either. No source we read shows GABA calms stress in a way that holds up, and none links it to herpes.
Many people with herpes notice stress as a trigger, and Mayo Clinic lists fever, stress, sun and hormonal changes for cold sores (Mayo Clinic, Cold Sore Symptoms and Causes). That is a reason to care about sleep and daily habits. It is not a reason to expect a capsule to do the job. The sales page for Reviralis talks about outbreaks and flare-ups, while the label never mentions herpes.
Herpes simplex virus has no cure. Prescription antivirals such as acyclovir, valacyclovir and famciclovir are the studied care, and a clinician decides which plan fits (CDC, STI Treatment Guidelines: Herpes). Keep taking any prescribed medicine, and do not change it because of a supplement.
Reviralis: from $49 a bottle60 capsules a bottle · 2, 3 or 6 bottles · free US shipping on 3 and 6 · 60-day money-back guarantee
See packsBefore you take it04
Who should ask a pharmacist before taking GABA?
Anyone who drives, works with machinery or takes medicine that also causes sleepiness. The label also tells people on antidepressants or nervous-system medicine to talk to a provider first.
Does a drowsiness effect matter with my sleep aid, antidepressant or allergy tablet? Should I take this at night, if at all? Is there anything in an 18-name blend you would flag?
- Read the label caution: ask first if pregnant or nursing, if you have a medical condition or seizure history, or if you take prescription medicine. Not for anyone under 18.
- See a clinician for a diagnosis, because other conditions look like herpes.
- Call 911 for trouble breathing, a seizure, chest pain, swelling of the face or throat, or sudden confusion with a severe headache and stiff neck.
Another name in the same blend is covered in the post on inositol doses. The label itself is walked through on the supplement facts page, and the side effects page lists cautions. Prices are on the pricing page.
FAQ05
Reviralis questions people ask
How much GABA is in Reviralis Complete?
The label does not print it. GABA is 9th of 18 names in a 661 mg blend, so it holds at most 73.4 mg per two-capsule serving. The true amount could be well below that, and no lab report is published.
Does GABA cross the blood-brain barrier?
It is unclear. The source we read says it is not known whether swallowed GABA reaches the brain, and it lists drowsiness as a possible effect. That uncertainty is the main reason oral GABA claims deserve caution.
Is oral GABA the same as the GABA your brain makes?
The molecule is the same, but swallowing it is not the same as the brain making it where it is needed. The open question is whether the swallowed form arrives at all. Evidence of benefit beyond placebo is unclear.
Does GABA interact with sleep or anxiety medicine?
A drowsiness effect could add to medicines that make you sleepy, so ask a pharmacist with your full list. We found no interaction table for GABA in the sources we use, which is why a person-by-person check matters.
Who wrote this06
Written and reviewed by
Pages built from the label, the sales page and linked NIH, CDC, FDA, FTC, Mayo Clinic and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site for a U.S. stocking partner for Reviralis. It is not the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
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