支鏈氨基酸

支鏈氨基酸^[1]（branched-chain amino acid，BCAA）是指白胺酸、異白胺酸和纈胺酸三種分子結構中側鏈具有分支結構的胺基酸。在運動界常作為增強肌肉力量的補充劑。

參考文獻

Karlsson HK, Nilsson PA, Nilsson J, Chibalin AV, Zierath JR, Blomstrand E. Branched-chain amino acids increase p70S6k phosphorylation in human skeletal muscle after resistance exercise. Am. J. Physiol. Endocrinol. Metab. 2004, 287 (1): E1–7. PMID 14998784. doi:10.1152/ajpendo.00430.2003.
Blomstrand E, Eliasson J, Karlsson HK, Köhnke R. Branched-chain amino acids activate key enzymes in protein synthesis after physical exercise. J. Nutr. 2006, 136 (1 Suppl): 269S–73S. PMID 16365096.
Norton LE, Layman DK. Leucine regulates translation initiation of protein synthesis in skeletal muscle after exercise. J. Nutr. 2006, 136 (2): 533S–537S. PMID 16424142.