Gamma-aminobutyric acid (GABA)

Gamma-aminobutyric acid (GABA) is an inhibitory neurotransmitter sold as a supplement and promoted for better sleep and insomnia. Studies have not shown convincing benefit for this use: oral GABA barely reaches the brain, and there is no solid evidence behind this application. For ongoing insomnia, cognitive behavioral therapy helps, along with treatment a doctor selects when needed. Do not use this supplement in place of approaches with proven benefit, or you risk missing the care you actually need.

Gamma-aminobutyric acid (GABA) is an inhibitory neurotransmitter; as a supplement it's marketed for calmness and mood stability. Clear benefit for this use hasn't been shown: the molecule barely crosses the blood-brain barrier, and there's no solid evidence for an effect on mood. For mood swings and anxiety, psychotherapy and clinician-prescribed medications with proven efficacy actually help. GABA is harmless in this role, but don't take it instead of treatment with proven benefit – you could miss the care you need.

Gamma-aminobutyric acid (GABA) is the main inhibitory neurotransmitter in the nervous system, and as a supplement it gets marketed for relieving stress and anxiety. Good-quality studies have not shown a clear benefit for this use: oral GABA crosses the blood-brain barrier poorly, and there is no solid evidence base for a calming effect. For anxiety and chronic stress, the approaches with proven benefit are psychotherapy (cognitive behavioral therapy first) and, where indicated, medication prescribed by a doctor. Do not take this supplement instead of treatment with proven benefit, since that can mean missing care that actually works.