The science looked promising and the safety profile seemed reasonable
All protocols require a prescription
Medication, Prescription Drug, and Topical Product Interactions Topical GHK-Cu may interact practically with other skin products by increasing irritation risk, especially in people using retinoids, acids, exfoliants, medicated creams, or post-procedure regimens
In advanced cellular assays, this has been shown to increase mitochondrial biogenesis and enhance the sirtuin-mediated stress response, as documented in prominent metabolic research databases
B12 is present in a variety of food sources (mainly animal-based products), where it is bound to protein molecules