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US Department of Health and Human Services, Office of Disease Prevention and Health Promotion
However, without maintenance sessions, sun protection or proper skincare, your pigmentation will gradually return
This is due to the fact that GHK is able to inactivate the damaging byproducts released from free radical reactions
Synthetic GHK-Cu is permitted in topically-applied cosmetic products under the INCI name Copper Tripeptide-1 within the Cosmetic Regulations framework, but that pathway covers cosmetic-grade ingredient use only, not the research-grade material on this page
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