GABA
A supplemental form of gamma-aminobutyric acid (GABA), the central nervous system’s chief inhibitory neurotransmitter. Taken for relaxation, stress, and sleep support — often paired with L-theanine or magnesium.
Benefits
GABA is the brain’s main calming neurotransmitter; supplements are used to promote relaxation, ease occasional stress and anxiety, and support sleep. Some trials report reduced stress markers, and standardized "PharmaGABA" forms are studied for raising relaxing alpha-wave activity.
Risks
Oral GABA crosses the blood–brain barrier poorly, so its central effects are debated and may act partly through the gut and peripheral nervous system. Generally well tolerated; higher doses can cause drowsiness, tingling, flushing, or a brief drop in blood pressure. Use caution with sedatives or blood-pressure medication and before driving.
Informational only — not medical advice.
Neurotransmitters
Related
Where to buy
Popular GABA products on Amazon. Not medical advice — talk to a clinician before starting a supplement.
As an Amazon Associate, Neurotransmission earns from qualifying purchases.
Research (145)
- From molecular mechanisms to digital surveillance: the 2010-2025 evolution of benzodiazepine and Z-drug misuse research Liu et al. (2026) Full text ↗ PubMed ↗
- Peripheral GABA-A receptor phosphorylation as a correlate of PMDD severity relative to ovarian hormone markers Strandberg et al. (2026) Full text ↗ PubMed ↗
- Age-related differences in motor learning, sensorimotor neurochemistry, and cortical reactivity co-occur but are dissociated Nuyts et al. (2026) Full text ↗ PubMed ↗
- Yogurt production with GABA-producing cultures: physicochemical properties and GABA content Erikli et al. (2026) Full text ↗ PubMed ↗
- Cortical glutamatergic and GABAergic inputs support learning-driven hippocampal stability Robert et al. (2025) Full text ↗ PubMed ↗
- Advances in GABA-Enriched Yogurt and Frozen Yogurt: Microbial Biosynthesis, Functional Properties, and Health Perspectives-A Comprehensive Review Ushidee-Radzi et al. (2025) Full text ↗ PubMed ↗
- Schizophrenia Leucht et al. (2025) Full text ↗ PubMed ↗
- Nutritional co-therapy with vitamin D and L-theanine reduces unpredictable mild chronic stress (UCMS) in aged mice by restoring alpha-oscillations, dopamine levels and behavioral improvement Hussain et al. (2025) Full text ↗ PubMed ↗
- Uncovering the role of Gpr45 in obesity regulation Li et al. (2025) Full text ↗ PubMed ↗
- Comparison of the effects of two amino acids, Gamma-aminobutyric acid (GABA) and L-theanine, on sedation, anxiety, and cognition in preoperative surgical patients - A randomized controlled study Deshpande et al. (2025) Full text ↗ PubMed ↗
- The Glutamate/GABA-Glutamine Cycle: Insights, Updates, and Advances Andersen (2025) Full text ↗ PubMed ↗
- Interactions Between Anesthesia and Sleep: Optimizing Perioperative Care to Improve Sleep Quality and Surgical Recovery Outcomes Patel et al. (2025) Full text ↗ PubMed ↗
- New plant-based kefir fermented beverages as potential source of GABA Scarpelin et al. (2025) Full text ↗ PubMed ↗
- Alcohol Withdrawal Meloy et al. (2025) Full text ↗ PubMed ↗
- Bacterial community in homemade kimchi and probiotic characterization of Lactiplantibacillus plantarum HQ04 Zhang et al. (2025) Full text ↗ PubMed ↗
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