Copper Tripeptide-1 God Antioxidant No known benefits Copper Tripeptide-1 at a glance Sends reparative signals to key proteins in skin’s extracellular matrix Supports skin’s collagen, elastin, and glycosaminoglycans (such as hyaluronic acid) Also provides antioxidant and skin-soothing benefits Results may include increased skin firmness/density and visibly minimized fine lines/wrinkles Studies show there is potential for increased hair growth (which may limit appeal for skin care) Copper Tripeptide-1 description Copper tripeptide-1 is made up of three amino acids (glycine, histidine, and lysine) combined with the mineral copper. This complex is naturally present within bodily fluids, but as a skin care ingredient, it is created synthetically in the lab. In the most basic sense, it is categorized as a skin conditioning ingredient, but research indicates copper tripeptide-1 is capable of much more in terms of its anti-aging abilities. That said, the potential for increased hair growth while using products that contain this ingredient does limit the appeal of copper tripeptide-1 for some people, hence holding it back from receiving a BEST rating. Copper tripeptide-1 is known as a signaling peptide due to the way it sends reparative signals by targeting key proteins in skin’s extracellular matrix. It is noted in research for supporting collagen and elastin production and increasing glycosaminoglycans (i.e. replenishing/hydrating substances like hyaluronic acid). This translates to benefits such as increasing skin’s firmness and density, while decreasing the appearance of fine lines/wrinkles. Research indicates it may also play a role in extending skin’s healthspan (also known as skin longevity). Additionally, copper tripeptide-1 has been shown to provide antioxidant and skin-soothing benefits. We must also point out that the potential for hair growth stimulation is mentioned as a side effect in some studies of copper tripeptide-1. While that could be beneficial if you’re wanting to incite hair growth, on the flipside, it would be a deterrent if you do not want to stimulate hair growth (such as on the face) while using skin care products that contain copper tripeptide-1. Searching the web, anecdotal results are mixed regarding this matter. More studies are needed to conclusively rule on these findings. The Cosmetics Ingredient Review 2018 safety assessment deemed copper tripeptide-1 safe as used in cosmetics. While their report did not call out recommended usage levels, suppliers of this ingredient suggest concentrations between 0.05-1%. Copper tripeptide-1 also goes by the abbreviated chemical name GHK-Cu or tradename GHK-copper or may be referred to simply as copper peptides or GHK.