For bodybuilders, the interest is practical: intense resistance training places repeated stress on muscles, tendons, joints, and connective tissue
It should be emphasized that the detailed pharmacokinetics of subcutaneous GHK-Cu absorption rate from the subcutaneous depot, plasma concentrationtime curves, tissue distribution, metabolic fate of the peptide backbone, and dose-linearity have not been characterized in controlled human studies
10.1016/j.phrs.2021.105466 85 LiN.WangW.ZhouH.WuQ.DuanM.LiuC.et al (2020b)
The company does conduct third-party tests for quality, purity, and consistency, but it's unclear whether they're done on raw materials, finished products, or both
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If youre pairing it with vitamin C, take them around the same time for recycling synergy