Copper tripeptide-1, also known as GHK-Cu, is a naturally occurring peptide that has been studied for decades in skin care and wound healing, where it's known for supporting collagen and a healthy skin environment. In lab studies, copper peptides have also been linked to larger hair follicles and a longer growth phase for hair.
Follicles that shrink over time are one reason hair gets finer and a part gets wider, so an ingredient studied for follicle size sits at the center of this formula. Panthenol, niacinamide, and green tea extract round it out by supporting scalp hydration, barrier, and comfort.