Contains essential amino acids: leucine, isoleucine, valine, lysine, threonine, methionine, phenylalanine, histidine, and cystine, glycine, proline, serine, arginine, glutamic acid, nicotinic acid and aspartic acid. All amino acids are building materials of protein, which are the most directly used materials for human tissues. Essential amino acids are amino acids that the human body needs, but can't be synthesized by itself or the synthesis speed can't meet the needs of the human body. They must be supplied by food protein. 22 kinds of amino acids are needed by human body, and coconut juice contains 16 kinds.