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The "right" dose sits in a narrow window that depends on: Delivery method - injectable GHK-Cu vs topical GHK-Cu vs oral/sublingual GHK-Cu Goal - skin rejuvenation , hair and scalp support, wound healing , general anti-ageing Individual factors - age , skin type , baseline GHK levels , other peptides being stacked Natural plasma GHK falls from roughly 200 ng/ml at age 20 to around 80 ng/ml by age 60

[DOI] [PMC free article] [PubMed] [Google Scholar] 162.Peng X.P., Nie C., Guan W.Y., Qiao L.D., Lu L., Cao S.J

Zhang H, Yue X, Chen Z, Liu C, Wu W, Zhang N, et al

All materials referenced are intended for laboratory research use only

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