Concentration: Look for formulations with GHK-Cu listed in the first half of the ingredient list, or in dedicated peptide serums where it is the hero active
Jacob SS, Prasad K, Rao P, Kamath A, Hegde RB, Baby PM, et al
Run Down & Need An Immune System Boost: Liposomal Vitamin C supplements aid recovery when feeling unwell and not your best
Natural and bioinspired phenolic compounds as tyrosinase inhibitors for the treatment of skin hyperpigmentation: Recent advances
"The depletion of stem cells would imply that the graying is permanent, but this has only been shown in mice," Rosenberg says
Mineral overdose: Selenium has a low therapeutic range more than 300 g/day can lead to selenosis (including hair and nail loss, neurological disorders)