A useful way to frame the difference: tretinoin is a top-down instruction that reprograms the epidermis, whereas GHK-Cu is a bottom-up supply of signal and cofactor that helps the dermis rebuild
Pettersen EF, Goddard TD, Huang CC, Couch GS, Greenblatt DM, Meng EC, et al
Dean SL, Knutson JF, Krebs-Kraft DL, McCarthy MM
Sp was able to restore cellular redox homeostasis under induced oxidative stress in mammalian cells and in vivo model, Drosophila where it ameliorated catalase and glutathione peroxidase deficiency
Clinical Update 4/21/2023 Five More Water Filter Pitchers Tested We tested five more water filter pitchers ( Aquagear , Berkey , Brita , Kirkland , and LifeStraw ) and found surprising results
1 Wilson disease Although it is an uncommon cause of liver failure, Wilson disease needs special attention because it has a poor prognosis