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Description
Effects of topical copper tripeptide complex on CO 2 laser-resurfaced skin

Obese rhesus monkeys lost 11% of their body weight in 28 days

more studies may be forthcoming, but for now, anecdotal evidence is what exists
GHK-Cu is a naturally occurring copper-binding tripeptide that penetrates the skin and signals fibroblasts to produce more collagen, elastin, and glycosaminoglycans