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Curr Res Immunol

The MHRA position, summarised by Lynda Scammell (head of borderline products at the MHRA) and reported in The Guardian on 4 April 2026, is that products which are sold for human use or which carry medicinal claims fall inside the Human Medicines Regulations 2012, and that the MHRA is investigating UK clinics making such claims about unregulated peptide products

Application method Scalp applicators with narrow tips help distribute AHK-Cu solution along part lines and directly to the scalp rather than coating hair shafts

Obtain sources in pharmaceutical-grade pharmacies with good reputations

Typical Concentrations Most cosmetic formulations contain 0.5%2% GHK-Cu

it is a biohacking tool for your skin that works best when integrated into a consistent, protected routine