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Topical application may help replenish this to support a healthier follicular environment and less comedone-promoting sebum

J Immunol Methods 33:351368

There's no chemical incompatibility between GHK-Cu and retinol - they work through entirely different pathways - but if your skin is sensitive or you're new to one or both, give them separate evenings until you know how your skin responds

Regulatory Compliance Manufactured under globally compliant quality systems with validated analytical characterisation and stability protocols, supported by complete regulatory documentation

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