What’s the Deal with Copper Peptides?

In this Skin Deep feature, I decode the science and hype behind copper peptides (GHK-Cu), a decades-old skincare ingredient making a major comeback. From collagen stimulation and wound healing to antioxidant protection and anti-aging effects, copper peptides show serious promise—when used in the right concentration and with compatible ingredients. This article breaks down how they work, where they shine, and what skincare professionals should know when clients come asking about this buzzy, bioactive tripeptide.