ghk cu gene expression study GHK-Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying of Numerous Antioxidant Genes GHK-CU | NEOPEPS
Description
(2) This antioxidant action may have been partly attributable to the presence of copper, which is posited to support SOD enzymatic function

Both work for topical use

Skin needling rollers are available with various needle sizes

What are they symptoms of a B12 deficiency

If they give you hesitancy with that, then thats a red flag

Even your mood might shift, with unexplained depression or irritability
