H-Tyr(3-NH2)-OH didrochloride drate is a tyrosine derivative.
Amino acids and amino acid derivatives have been commercially used as ergogenic supplements. They influence the secretion of anabolic hormones, supply of fuel during exercise, mental performance during stress related tasks and prevent exercise induced muscle damage. They are recognized to be beneficial as ergogenic dietary substances[1].
References:
[1]. Luckose F, et al. Effects of amino acid derivativeson psical, mental, and psiological activities[J]. Critical reviews in food science and nutrition, 2015, 55(13): 1793-1807.