Phenibut free amino acid has around ninety nine% active Phenibut. A very low dosage is needed for Phenibut no cost amino acid as it truly is high in potency. GABA-B Receptor Agonist: The main mechanism of motion of phenibut is being an agonist within the GABA-B (gamma-aminobutyric acid sort B) receptors. GABA is the first inhibitory neurotransmitt