United States Patent US 5,538,945 (peptide-copper complexes for hair growth)
Li Y, Fu R, Duan Z, Zhu C, Fan D
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If a peptide has not dissolved after 30 minutes of gentle periodic swirling, there may be a solubility issue, and you should consider using a different solvent or adding more water
It affects approximately 10 percent of individuals of reproductive age and is a leading cause of chronic pelvic pain, dysmenorrhea, dyspareunia, and infertility
Determination of N-homocysteinyl-lysine and -glutamylcysteine in plasma by liquid chromatography with UV-detection