Ratio of L-leucine, l-isoleucine, l-valine 8:1:1 Composition enriched withVitamins B1 and B6. Yamamoto BCAA Powder 8:1:1, Branched Chain Amino Acids - 300 g. BCAA blend [L-leucine, L-valine, L-isoleucine], vitamin B6 (pyridoxine hydrochloride), vitamin B1 (thiamine hydrochloride).