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Gamma-
Aminobutyric Acid

Limited research available·3/10
A higher score indicates better study conditions, but not necessarily effectiveness.

A calming neurotransmitter supplement that may support relaxation, sleep, and healthy blood pressure.

Sleep ImprovementCardiovascular SupportStress ReliefNeuroprotectiveAnxiety Relief
dose range
250–750 mg
1–2 doses per day
Consumption
Take with or without food. For sleep benefits, best taken 30–60 minutes before bedtime.
Not fat-soluble.
Best time
Pre-sleep dosing preferred for sleep support; daytime or divided dosing may be used for stress/anxiety.

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Description

Gamma-Aminobutyric Acid (GABA) is a neurotransmitter that helps inhibit nerve activity in the brain. While the body's own GABA reduces anxiety and promotes relaxation, supplemental GABA is used for stress relief, sleep, and possible cardiovascular benefits, though its effectiveness is limited by poor absorption into the brain.

benefits
Main effects with level of evidence
Limited
Note on evidence

Research shows modest effects for anxiety, sleep, and blood pressure, but oral GABA’s brain uptake and real-world benefit are limited by poor bioavailability.

May reduce anxiety and promote relaxation

Limited

Supplemental GABA may help lower feelings of anxiety and support a calm mental state.

Particularly relevant for: Individuals with mild anxiety · People seeking stress relief
1 · PubMed (Abdou AM, et al., 2006)6 · Examine.com: GABA

May improve sleep quality and onset

Limited

GABA may help people fall asleep faster and experience better sleep quality, particularly in those with mild sleep disturbances.

Particularly relevant for: People with sleep onset difficulties · Individuals seeking sleep support
2 · PubMed (Yamatsu A, et al., 2016)6 · Examine.com: GABA

Potential support for healthy blood pressure regulation

Limited

Some studies show that GABA supplementation or GABA-enriched foods may modestly reduce blood pressure, especially in individuals with mild hypertension.

Particularly relevant for: Adults with mild hypertension
3 · PubMed (Inoue K, et al., 2001)6 · Examine.com: GABA

Last updated:

This information is for educational purposes only and does not replace medical advice.
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This website is for educational and informational purposes only and does not constitute medical advice or professional services. The information provided should not be used to diagnose or treat any health problem or disease. Persons requiring medical advice should consult a licensed physician.