GHK-Cu is a naturally occurring peptide found in human plasma, urine, and saliva. Studies in animal models suggest it plays a key role in tissue repair and regeneration by boosting collagen production, activating fibroblasts, and supporting new blood vessel formation. It’s believed to act as a biological signal that responds to tissue damage, helping to coordinate healing. Additionally, GHK-Cu has shown strong antioxidant properties, helping to reduce oxidative stress and protect cells from free radical damage.