Quick Takeaways GHK-Cu is a naturally occurring copper peptide that drops 60% between age 20 and 60, making supplementation a legitimate restoration strategy, not just cosmetic enhancement Visible skin improvements typically appear in 4-8 weeks, with continued enhancement through 12+ weeks as collagen remodeling cycles complete Hair regrowth and follicle enlargement take 8-12 weeks minimum because youre working with hair growth cycles, not magic Route of administration matters dramaticallysubcutaneous injection outperforms topical application by a significant margin for systemic and localized effects What is GHK-Cu Copper Peptide

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Funding This research was supported by the China Postdoctoral Science Foundation (2021M701420), Guangdong Basic and Applied Basic Research Foundation (2022A1515110021), Guangzhou Science and Technology Projects Foundation (202201020002), Scientific Research Project of Guangdong TCM Bureau (20221105), Guangdong Medical Research Foundation (A2022214)
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