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
When youre talking about peptides being promoted online, those health claims have not been vetted by any expert group, the FDA, or anyone else
It might push pigment deeper or cause pigment to move within the skin, creating an undesirable look (which is why it is not recommended)
See the results in our answer to the question: Is it true that there are bits of plastic in drinking water and specialty salts
These signals can shift gut movement, pain sensing, and barrier strength