OnePin Peptide Library · Cognitive & Mood
GABA
Gamma-Aminobutyric Acid
GABA (γ-aminobutyric acid) is the major inhibitory neurotransmitter in the central nervous system, balancing excitatory glutamate signaling. Endogenous GABA does not cross the blood-brain barrier well - this is a frequently-cited reason why supplemental GABA's effects are debated. However, multiple human studies show GABA supplementation produces measurable EEG changes (alpha activity increase) and subjective relaxation/anxiety reduction, suggesting either limited BBB transport, peripheral GABAergic effects (gut-brain axis via vagal afferents), or placebo plus enteric nervous system effects.
30-60 min before sleep or stressful event.
Start here. Every protocol below is ordered lowest-first. Begin at the smallest effective dose, hold about a week to assess tolerance, and step up only if needed.
How it works
Mechanism is debated due to limited BBB penetration:
Direct CNS Effects
Some BBB penetration may occur via specific GABA transporters; effect size unclear at supplement doses.
Vagal/Enteric Pathway
GABA receptors in the gut and vagal afferents may signal to brain via gut-brain axis, producing relaxation effects without requiring BBB crossing.
Peripheral GABAergic
GABA receptors on peripheral tissues (liver, pancreas, muscle) - clinical relevance to subjective effects unclear.
EEG Changes
Multiple human studies show oral GABA increases EEG alpha activity (relaxation marker) and decreases beta activity (alert/anxious marker) within 30-60 minutes.
Cortisol Reduction
Modest acute cortisol reduction in stress-test paradigms.
What to expect
30-60 min onset.
1-3 hour functional effect.
Cumulative use: similar profile.
Evidence
Interactions & stacking
What's safe to combine, and what belongs in a separate pin.
Keep separate
Side effects & safety
Commonly reported
- Mild drowsiness
- Mild headache (rare)
- Possible mild GI
Less common & notes
- Rare allergic reactions.
- No abuse/dependence at supplement doses.
Pharmacokinetics
Storage. Capsule. Cool dry location.
Regulatory status
Dietary supplement (US, DSHEA). EU: classification varies.
Put it to work
Calculate, log & track
Open GABA straight into OnePin with your vial and dose pre-filled, then let it handle the syringe math and remind you before the vial runs out.
Open GABA in the app →Go deeper
The guide & community
The complete GABA walkthrough, real protocol discussion and coaching live inside the BlessUp community on Skool.
Join the community ↗