This document summarizes the metabolism of branched chain amino acids (BCAAs) - valine, isoleucine, and leucine. It discusses that the initial reactions in BCAA catabolism are common, involving transamination, oxidative decarboxylation, and dehydrogenation to form acyl-CoA derivatives. It then explains that the subsequent catabolism of each BCAA differs and leads to the formation of acetyl-CoA and succinyl-CoA. One key point is that defects in BCAA catabolism can cause metabolic disorders like maple syrup urine disease, where the branch chain keto acid dehydrogenase enzyme is deficient.