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Side effects can sometimes occur due to: poor ingredient quality contamination incorrect formulation low manufacturing standards Choosing certified, well-tested products helps reduce unnecessary risks
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While Matrixyl targets wrinkle reduction and Argireline helps relax facial muscles, GHK-Cu goes beyond cosmetic effects by actively supporting skin regeneration, reducing inflammation, and improving healing
Hsieh et al
Higher doses have inconsistent effects and, in some cases, reduced cell proliferation
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