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Some small-scale studies have suggested potential benefits in hair regrowth, but no adequately powered, placebo-controlled head-to-head trial has demonstrated that copper peptides perform comparably to 5% minoxidil

Leavitt, M

However, older users often derive greater initial benefit making even partial retention valuable, while younger users might question whether modest improvements justify treatment investment when natural skin quality remains good

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