GABA (full name Gamma Aminobutyric Acid) is a naturally occurring substance, manufactured in the human brain from Glutamate (Glutamic acid).
It acts as a mild inhibitory (relaxing) neurotransmitter, and as such has been used to treat stress, anxiety, and similar complaints. It has also been used by athletes and anti-aging fans as a gentle stimulator of Growth Hormone release.
GABA is most commonly used by athletes as a sleep aid, to improve sleep quality and to increase Growth hormone release.
GABA can also be used during daylight hours as a mild stress relief/ anti-anxiety aid