For hair specifically, the Pyo 2007 study (PMID 17703734) described a more defined mechanism: in cultured human dermal papilla cells, AHK-Cu increased proliferation, raised vascular endothelial growth factor (VEGF), lowered transforming growth factor-beta1 (TGF-beta1), and shifted apoptosis markers toward cell survival
This vitamin works together with folic acid to help form DNA and nerve cells
A deficiency of this vitamin can impact mental health
B12 shot Vitamin B12, or cobalamin, is a water-soluble vitamin that helps your body produce red blood cells and DNA
It stimulates collagen and elastin production, improving skin firmness, reducing wrinkles, and enhancing would healing