what ghk cu does GHK-Cu Side Effects: the Research Say? Doctor Explains Copper Peptide (GHK-Cu): Clinical Uses,

The FDA does not require pre-approval for cosmetic ingredients, which is why thousands of serums, creams, and prescription formulations contain it without regulatory issue

The peptide's primary function may not ultimately be sleep at all, although it is most closely associated with sleep cycle regulation, because DSIP levels are the same in CNS tissues as in peripheral tissues, suggesting that the peptide may also be formed outside the CNS

Weeks 3 and 4: building phase Increase to 15 units daily (3.0mg total)

Equally important is the restoration of the tissues structural architecture

This may aid in the formation of tighter and smoother skin