I am immune suppressed following a liver transplant 20 years ago. Immune suppression raises my susceptibility to skin cancers about 30-fold over gen pop. I have to see a dermatologist a few times a year to have any suspected skin lesions freeze dried or surgically removed. For several years now I’ve been following the dermatologist’s recommendation of supplementing with D3. I take 50,000 units weekly. My heart health and lipid profile are good to very good, aside from some PVCs and PACs, so it’s unlikely that I can get a script for V on label or off.