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Always pair with sunscreen: Vitamin C improves the efficacy of sunscreen and prevents new pigmentation
GHK-Cu has the strongest human evidence base of any peptide in this article, but it is essential to understand the nature of that evidence
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Wei Wang, [email protected] These authors have contributed equally to this work Disclaimer All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers
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