As a modified version of gamma-aminobutyric acid, Phenibut HCL offers many of the similar potential effects and benefits as GABA. GABA is naturally released by the brain to invoke feelings of calm and relaxation, but GABA cannot supplemented because the compound has trouble circulating from the blood to the brain or neurons on its own. Phenibut HCL has been shown to replicate many of GABA's effects, activating the same receptors. This may result in relaxaton and a distinct calming effect.