GHK-Cu, commonly known as copper peptide, is a naturally occurring tripeptide complexed with copper ions. It was first identified in human plasma and later found in various tissues of the body, playing a vital role in regulating cellular activities. As a high-value active ingredient in skincare, it is renowned for its excellent biocompatibility and multi-targeted benefits for skin health, making it a staple in anti-aging and skin-repair product lines.

In terms of core functions, copper peptide’s most notable effect is promoting skin repair and regeneration. It can stimulate the synthesis of collagen and elastin in fibroblasts, two key structural proteins that maintain skin firmness and elasticity. This helps repair damaged skin barriers, reduce the appearance of fine lines and wrinkles, and improve skin sagging caused by aging or external damage. Additionally, it accelerates the healing process of minor skin wounds, sunburns, and post-procedure inflammation, making it ideal for use after laser treatments or chemical peels.

Copper peptide also exhibits strong antioxidant and anti-inflammatory properties. It can scavenge free radicals generated by ultraviolet radiation and environmental pollutants, reducing oxidative stress that leads to premature skin aging. Meanwhile, it inhibits the release of inflammatory mediators, alleviating skin redness, irritation, and sensitivity. Unlike some potent anti-aging ingredients that may cause irritation, copper peptide is gentle and suitable for most skin types, including sensitive and acne-prone skin.

Furthermore, copper peptide helps regulate skin texture and improve hydration. It enhances the skin’s ability to retain moisture by boosting the production of glycosaminoglycans, such as hyaluronic acid. This results in plumper, more hydrated skin with a smoother and more even texture. It also has a mild brightening effect, as it promotes the turnover of skin cells, fading dullness and post-inflammatory hyperpigmentation over time.

Copper peptide is highly compatible with a wide range of skincare ingredients, including hyaluronic acid, niacinamide, and vitamin C derivatives. It is commonly incorporated into serums, creams, and essences, and is valued for its stable performance and long-term benefits for skin health.