A meta-analysis of patients from two large trials revealed that patients with normal kidney function may benefit from vitamin B12 supplementation for stroke prevention, whereas patients with impaired kidney function may not (235)
You will see most of these studies are in rats and dogs
However, GHK-Cu is also available as a topical foam and facial cream
Reported side effects of DSIP are limited because there are very few human studies
It also includes biotin, vitamin C, vitamin E, vitamin D3, K2, calcium, magnesium, probiotics, enzymes, and organic antioxidant ingredients
Because long-term safety data are limited, medical supervision is especially important when combining experimental compounds