GABA is an acronym for gamma-aminobutyric acid, an amino acid found in your brain. In the brain, GABA serves as the main inhibitory neurotransmitter. (A neurotransmitter is a chemical messenger in the brain.) GABA's main message is to slow down some brain activities. You could think of it as a natural tranquilizer. [2-4]
In fact, one 2008 study found that taking a GABA supplement led to a 400% increase in HGH at rest and a 200% increase following exercise . Limited research suggests that GABA may also help improve

Gamma-aminobutyric acid (GABA) is a naturally occurring amino acid. GABA is a neurotransmitter, which means it delivers a message through your nervous system from one neuron to another. GABA, in particular, is an inhibitory neurotransmitter, so it blocks other messages and controls the speed at which information travels through the nervous system.

Yeah I also have read GABA won't cross the BBB so it won't raise GABA in the brain. However, most GABA receptors etc and other neurotransmitter and other receptors are located in the gut. It's hella important to have a good gut microbe going, too. GABA is absorbed in the gut and other areas of the body.
They also reported a trend for reduced changes for beta waves in GABA vs. water condition. The only 4 week-long interventional study utilizing biosynthetic GABA observed an increase in cortisol levels in the placebo group after 2 and 4 weeks of GABA use, but GABA group did not show such an increase (Yamatsu et al., 2013).
According to them, GABA possibly contains antidepressants, sedatives, anticancer, antidiabetic, antihypertensive, and immune system enhancer properties. [ 2 ] Additionally, there is a 2019 review that states that GABA holds antioxidant, antimicrobial, and antiseizure. With such properties, GABA is thought of helping to treat conditions such as
dUO8.
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    • do gaba supplements increase gaba