Sleep

GABA (Supplemental)

Also known as: GABA (Gamma-Aminobutyric Acid)

Evidence

Inhibitory neurotransmitter supplement with debated BBB penetration. May work peripherally for relaxation.

Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.

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Primary uses

Relaxation
Sleep support
Stress reduction

How it works

Main inhibitory neurotransmitter
BBB penetration debated
May work via gut-brain axis

Dosage

Typical range: 250-750 mg daily
Timing: Evening
With food: Optional
Duration: Acute effects
Special populations: Mild anxiety, sleep

Forms

Capsules
PharmaGABA

Safety

Common side effects

Drowsiness
Tingling

Contraindications

None

Products containing GABA (Supplemental)

Top-scoring supplements in our catalog that list GABA (Supplemental) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.

Seed

• PM-02™ Sleep + Restore Supplement

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Evidence notes

Debated effectiveness - BBB penetration unclear

Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.

GABA (Supplemental) compared head-to-head

Calming / Anxiety
GABA (Supplemental) vs L-Theanine

Related in Sleep

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.