GABA, also known as gamma-aminobutyric acid, is an amino acid that helps stimulate relaxation and sleep.
Research has shown that low brain levels of GABA causes increased wakings after falling asleep, and that supplementation with GABA can induce relaxation, and help you fall asleep faster, stay asleep longer, and improve the quality of your sleep.
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The common clinical supplementation protocol used is 500-600 mg before going to bed.