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Route of administration changes the result: supervised subcutaneous injection of 503A compounded GHK-Cu produces systemic and targeted effects that topical serums cannot replicate

In 2026, it remains the most evidence-backed carrier peptide in cosmetic science

Growth factor-like activity GHK-Cu is sometimes described as growth factor-like, because it influences genes involved in regeneration and inflammation

When product labels or social media content refer to copper peptide before and after, they are typically describing GHK-Cu, which is the primary copper-binding peptide researched for skin and hair applications

Glutathione FAQ Sources Innerbody uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles