It's composed of three amino acids: cysteine, glutamic acid, and glycine
57 HuangD.LiQ.SunX.SunX.TangY.QuY.et al (2020)
The aging process, cumulative ultraviolet radiation exposure, trauma, infections, local nail unit diseases, systemic diseases, nutritional deficiencies, and medications can cause nail abnormalities
2009 Mar [cited 2020 Apr 28];26(3):26878
Recent research on animal models has focused particularly on mice carrying modifications in genes associated to the risk of developing schizophrenia, as well as on the exposure to environmental insults
But what about GHK-Cus side effects