Research overwhelmingly describes the safety of GHK-Cu positively, such as when the authors of a 2018 review called it a safe, inexpensive, extensively studied compound.14 However, even though copper peptides have demonstrated an impressive safety track record in studies, there are (as with most skin care actives) a few safety risks to consider
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How do I use Copper Peptide Scalp Serum
Since ingredients like retinoids and high-dose salicylic acid are off limits [due to the potential to cause developmental defects], she recommends looking for gentler exfoliating acids like lactic, glycolic, and azelaic acids, as well as sulfur-based acne spot treatments as alternatives to help prevent and treat breakouts