Phenibut Free Amino Acid – Powder, 50 grams

A GABA derivative with a phenyl ring substitution, phenibut (β-phenyl-γ-aminobutyric acid) has improved lipophilicity and bioavailability. Its solubility and absorption characteristics are different from those of its HCl or FAA counterparts because it remains in its unbound state as a free amino acid. This substance mainly affects neurotransmitter signaling pathways by interacting with GABA_B receptors. It is metabolized by the liver by conjugation and deamination, and renal clearance is the main method of excretion.