BCAA: A branched-chain amino acid is an amino acid having aliphatic side-chains with a branch. Among the proteinogenic amino acids, there are three BCAAs: leucine, isoleucine and valine. Non-proteinogenic BCAAs include 2-aminoisobutyric acid.
EAA: Essential amino acid
An essential amino acid, or indispensable amino acid, is an amino acid that cannot be synthesized de novo by the organism, and thus must be supplied in its diet. The nine amino acids humans cannot synthesize are phenylalanine, valine, threonine, tryptophan, methionine, leucine, isoleucine, lysine, and histidine