Essential amino acid supplement suitable for adult athletes who train intensively. The essential amino acids contribute to meeting protein / nitrogen requirements. In addition, they also include branched chain amino acids (BCAA) suitable for supplementing an athlete’s diet. They are part of the category of all the essential amino acids that the human body is not able to produce (synthesise) for itself in the right quantities and therefore have to be supplemented in the diet. During particularly intense and prolonged muscular exercise a negative balance of nitrogen is created, due to the use of amino acids for energy. Therefore taking a supplement containing amino acids within 24-48 hours of intense training sessions seems effective in promoting recovery.