BCAA pro 5000 contains a precise and scientifically documented 2/1/1 ratio of branched chain amino acids BCAA s plus the carnosine boosting supplement beta alanine. BCAA pro 5000 increases protein synthesis, stimulates nitrogen retention and most importantly, protects lean muscle tissue from the catabolic stress of heavy training and intense exercise. BCAA pro 5000 features b alanine which is a direct precursor to carnosine. Carnosine is extremely effective in buffering hydrogen ions, which are generally elevated in exercising athletes. In essence, the addition of b alanine and subsequently carnosine in BCAA pro 5000 is related to its effects on preventing your muscles from becoming too acidic during times of stress. Vitamin B6 has been added to enhance amino acid utilization directly into the muscle tissue. Aspartame free version also available.