Amino Acid supplements are perennial dietary aids, known for generations to assist in lean muscle building and resisting muscle catabolism during long workouts, cardio, and dieting. The branched-chain amino acids (BCAA) are easily the most important for athletic purposes, with the remainder of the essential amino acids (EAA) coming in as a very close 2nd. BCAAX represents an advanced reinvention of the classic BCAA class of products.