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Description
The benefit of AHK-Cu is that there's more research behind it for hair growth, as the AHK peptide combination has a higher affinity to hair follicles

No study has tested these three together in animals or humans, so the synergy is reasoned from mechanism, not measured
doi: 10.1002/bies.1115

But somewhere in the transition from skincare ingredient to TikTok trend, copper peptides picked up a reputation for hair too
