GABA 500mg
The score explained
evidence, testing and value, weighed before price
Why 5.8 of 10: Provisional: mechanism disputed, human evidence weak and mixed.
- Cheap
- Some small trials report relaxation effects
- Reputable GMP manufacturer
- Oral GABA may not cross the blood-brain barrier well
- Sleep evidence is weak and inconsistent
what the evidence says
GABA is the brain's main calming neurotransmitter, but the honest picture for swallowing it is murky: it is unclear how much oral GABA reaches the brain, and the small human studies that exist report mixed, mostly subjective effects on relaxation and sleep. The evidence is weaker than for glycine or theanine. It is safe, but this is a low-confidence pick and the score reflects that.
Plain-language assessment of the human evidence. No cherry-picked citations.
reviews
Most reviewers take it for stress and report it doing its job quietly. Ratings cluster around 4.4 stars across retailer sites, with few complaints beyond shipping.
Stack this with
SupplementsSports Research L-Theanine 200mgBoth target stress. Sports Research L-Theanine 200mg covers the nutrient side of stress, a cheap daily base under everything else you do.
SupplementsNOW Foods Glycine 1000mgBoth target sleep. NOW Foods Glycine 1000mg covers the nutrient side of sleep, a cheap daily base under everything else you do.
GearAdaptyx Cortisol SensorBoth target stress. Adaptyx Cortisol Sensor puts a number on stress, so within weeks you can see whether the routine is actually working.