Three forms: niacin/nicotinic acid (causes flushing, raises HDL), niacinamide/nicotinamide (no flushing, used for skin/joints), and nicotinamide riboside/NR (NAD+ precursor for longevity). Each form has DIFFERENT clinical applications despite being the same vitamin. --- *Reviewed by the Dose AI Research Team and Clinical Advisory Board* *Last updated: 2026-04-06*
Reviewed by the Scan Dose Research Team and Clinical Advisory Board | Last updated:
Not medical advice. Based on published clinical research and systematic reviews.