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3Medicinal

GABA

Also sold as Gamma-aminobutyric acid

Widely sold, but oral absorption into the brain is questionable.

3TrustedSupp Tier System™ · Tier 3Take as a defined course

How long to take it

No established course.

Who it's actually for

Limited justification given the blood-brain barrier problem.

Safe upper limit

Unverified
No formal limit; 100–3,000 mg daily in trials
Well tolerated, largely because much of it may not reach the brain.
No source attached yet. Treat this as a starting point, not a citation, until reviewed.

Interactions to know about

  • Sedatives / sleep medication — Benzodiazepines, zopiclone, zolpidem, opioids
  • Blood pressure medication — Beta blockers, calcium channel blockers, ACE inhibitors

Other supplements:

Run your full list through the interaction check.

Practical notes

  • Oral GABA crosses the blood-brain barrier poorly — any effect may be via the gut nervous system.
  • L-theanine has better support for the same goal.