People mainly take GABA for anxiety, sleep, mood. Based on 208 first-hand reports and 8 meta-analyses & systematic reviews in the medical literature. Ranked #204 of 1,974 overall.
Of reports that state an outcome, 44% are positive.
Of the people who reported each effect, the share who said it got better.
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
3+ meta-analyses or systematic reviews and 10+ randomized controlled trials in humans. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: The results provide plausible evidence for the positive role of zinc in the treatment of patients afflicted with anxiety, albeit with some limitations.
PubMed 37364014 ↗Conclusion: In respect to animal models of adult vitamin D deficiency, such exposures produce subtle neurochemical alterations and effects on cognition but do not appear to produce behavioral phenotypes of relevance to schizophrenia. We conclude, the hypothesis that vitamin D deficiency during early life may increase the risk of schizophrenia remains plausible and warrants ongoing research.
PubMed 33500553 ↗Conclusion: This study showed that the doses and the duration of the GABA supplementation can affect the growth performances of chickens under stressful conditions. However, the effect of GABA on immune responses and blood parameters is perceived with a relatively longer supplementation duration.
PubMed 33856631 ↗Conclusion: While the rate of adverse effects was low in all studies, it was found to increase as dosages increased. Results support that pregabalin has a role in decreasing postoperative pain intensity and supplemental opiate use; however, the optimal dose or dosing regimen is not yet well understood.
PubMed 35604860 ↗As stated by users — not a recommendation. Follow the label or your doctor.
How often each side effect came up across all reports.
Verbatim quotes, shortened only — each links to the original discussion.
“Phenibut, GABA, Valerian, Kava Kava, melatonin, B Vitamin complex, and mineral supplement. All in varying combinations and dosages.”
“Supplementing gaba and taking modafinil is counterproductive.”
“we specifically stacked certain compounds like GABA in high doses to test their affects on recovery for him. It was very successful and perfectly safe/healthy to do it in moderation.”
“Gaba is similarly great for anxiety.”
“I like GABA at the end of a long day... Good way to come down.”
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate