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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

Leavitt, M

Subcutaneous injection technique for GHK-Cu Proper administration ensures results and safety

Pickart holdS the patent on GHK and 2nd generation copper peptides

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

As a result, the disparity between safety profiles for GHK-Cu injection vs topical delivery methods is considerable