For information about supplements that have been investigated in humans for athletic performance and joint health, see our Reviews of Muscle and Workout Supplements , Collagen Supplements , Nitric Oxide Supplements , and Joint Health Supplements
Biomarkers like collagen-1C degradation fragments or hyaluronic acid levels may offer context, though specific GHK-Cu response biomarkers remain understudied
After that, many patients shift to monthly doses for maintenance
the endpoints are weight, HbA1c, and other surrogates over trial-length follow-up
"The role of copper peptides in tissue repair and skin care." Journal of Cosmetic Dermatology , 13(2), 86-93
That last group is the most vulnerable, and it includes a large percentage of people entering the peptide research space for the first time through vendors like Amino Asylum