GHK-Cu (copper peptides) is a popular peptide in the beauty and longevity space, which is often taken as a subcutaneous injection or through medispa treatments like microneedling and you can even find some experimental oral GHK-Cu tablets but it's mostly known for skin rejuvenation, hair health, wound healing, and healthy aging
Deng et al., 2021
[4] Interestingly, the researchers comment, "AOD 9604 does not interact with the hGH receptor. This modification may have made the hGH Fragment 176-191 relatively more stable than other peptides
Subramanian B, Gao S, Lercher MJ, Hu S, Chen W-H
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