This article provides a comprehensive overview of copper peptides (particularly GHK-Cu), explaining what they are and how they work, with a focus on their biological mechanisms and documented benefits for both skin and hair. It covers how copper peptides support collagen and elastin production for anti-aging and tissue repair, their potential to improve wound healing and reduce scars, and their role in stimulating hair follicle growth and combating hair thinning. The piece also includes guidance on safe and effective usage in skincare and hair care routines.