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
Lessons from arthritis and cell therapy in cancer patients point to therapy for severe disease
International Journal of Molecular Sciences, 22 (19), 10799
For a 70 kg person, that yields 1.05 to 2.1 mg per day, consistent with the flat-dose ranges below
Together, these mechanisms explain why GHK-Cu is considered one of the most promising compounds for non-hormonal hair restoration, supporting both new growth and the preservation of existing hair
Peptide Reconstitution Guide (Step-by-Step) Many peptides are dispensed in a lyophilized, or powdered, form