Phenibut Free Amino Acid – Powder, 50 grams

Phenibut (β-phenyl-γ-aminobutyric acid) is a GABA derivative with a phenyl ring substitution, allowing for enhanced lipophilicity and bioavailability. As a free amino acid form, it maintains its unbound state, differing from its HCl or FAA counterparts in solubility and absorption properties. This compound primarily interacts with GABA_B receptors, influencing neurotransmitter signaling pathways. It undergoes hepatic metabolism via deamination and conjugation, with primary excretion through renal clearance.