Skip to main content
SupplementScience

Benefits of Vitamin B3 (Niacin)

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

Evidence-Based Benefits

  • Cholesterol management — niacin (nicotinic acid) at 1-3 g/day raises HDL by 15-35% and lowers LDL by 5-25% and triglycerides by 20-50%; however, the AIM-HIGH trial (2011, n=3,414) found no incremental cardiovascular benefit when added to statin therapy
  • Skin health — niacinamide (nicotinamide) at 500 mg twice daily reduced non-melanoma skin cancer incidence by 23% in the ONTRAC trial (2015, n=386); topical niacinamide improves skin barrier, reduces acne inflammation, and decreases hyperpigmentation
  • NAD+ and aging — nicotinamide riboside (NR) at 250-1,000 mg/day increases blood NAD+ levels by 40-90% in human trials; the CHROMADIET trial showed improved mitochondrial function markers
  • Energy metabolism — as NAD+ and NADP+, vitamin B3 derivatives are essential for glycolysis, the citric acid cycle, fatty acid oxidation, and the electron transport chain

What the Research Says

Vitamin B3 has a complex clinical profile. For cholesterol, niacin was a cornerstone therapy for decades, but the AIM-HIGH trial (2011, n=3,414) found no cardiovascular benefit when added to statin therapy, diminishing enthusiasm for high-dose niacin. For skin health, the ONTRAC trial by Chen et al. (2015, n=386) demonstrated that nicotinamide 500 mg twice daily reduced the incidence of new non-melanoma skin cancers by 23%. In aging research, Martens et al. (2018) showed that nicotinamide riboside (NR) at 1,000 mg/day raised NAD+ levels by approximately 60% and was well-tolerated in healthy older adults, though clinical outcome benefits remain under investigation.

Related Conditions

EnergySkin HealthHeart Health
Full Vitamin B3 (Niacin) Guide

References

  1. (). Niacin in patients with low HDL cholesterol levels receiving intensive statin therapy. New England Journal of Medicine. DOI
  2. (). A phase 3 randomized trial of nicotinamide for skin-cancer chemoprevention. New England Journal of Medicine. DOI
  3. (). Chronic nicotinamide riboside supplementation is well-tolerated and elevates NAD+ in healthy middle-aged and older adults. Nature Communications. DOI