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Vitamin B3 (Niacin) — Frequently Asked Questions

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

Frequently Asked Questions

What is the difference between niacin and niacinamide?

Both are forms of vitamin B3 but have different effects. Niacin (nicotinic acid) affects cholesterol by raising HDL and lowering LDL/triglycerides, but causes flushing. Niacinamide (nicotinamide) does not affect cholesterol and does not cause flushing, but supports skin health and has shown cancer prevention benefits. Both contribute to NAD+ production.

What is nicotinamide riboside (NR) and does it really slow aging?

NR is a newer form of vitamin B3 that efficiently raises NAD+ levels, a coenzyme that declines with age. Human trials show NR at 250-1,000 mg/day increases blood NAD+ by 40-90%. While animal studies show promising anti-aging effects, large human clinical trials on healthspan and lifespan outcomes are still ongoing. It is well-tolerated but expensive compared to standard B3 forms.

How do I avoid niacin flush?

To minimize niacin flush: start with a low dose (100 mg) and gradually increase over weeks, take with food, take aspirin (325 mg) 30 minutes before, and use immediate-release rather than sustained-release niacin (which has more liver risk). Alternatively, niacinamide and NR provide B3 benefits without any flushing.

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