Life Extension Vitamin B3 Niacin
vs
NOW Foods Niacin
Supplement Comparison

  • Vitamin B3 (Niacin): same total amount on both labels
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 2 nutrients compared
Bar chart: per-serving label amounts and listed forms for Life Extension Vitamin B3 Niacin vs NOW Foods Niacin.

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Frequently asked questions

Which active ingredients does Life Extension Vitamin B3 Niacin have?

  • Vitamin B3 (Niacin)

Which active ingredients does NOW Foods Niacin have?

  • Vitamin B3 (Niacin) appears as Nicotinic Acid

Which categories do Life Extension Vitamin B3 Niacin and NOW Foods Niacin belong to?

  • Single Vitamin

What health concerns do Life Extension Vitamin B3 Niacin and NOW Foods Niacin address?

  • Cholesterol Support
  • Energy & Metabolism
  • Heart & Cardiovascular Health
  • General Health

Which product has a higher amount of Vitamin B3 (Niacin) per serving?

  • Both products list the same total amount of Vitamin B3 (Niacin) per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Life Extension Vitamin B3 Niacin: 1 capsule
    • NOW Foods Niacin: 1 capsule
  • Vitamin B3 (Niacin)
    • This supplement has 500 mg
    • Recommended Dietary Allowance in men: 16 mg
    • Recommended Dietary Allowance in women: 14 mg
    • Tolerable Upper Intake Level: 35 mg
  • Vitamin B3 (Niacin)
    • This supplement has 500 mg
    • Recommended Dietary Allowance in men: 16 mg
    • Recommended Dietary Allowance in women: 14 mg
    • Tolerable Upper Intake Level: 35 mg

Last updated: February 12, 2026

  • Sources & Methodology: Nutrient data and forms are taken directly from Supplement Facts labels. Reviewed and standardized by the VIOscan Research Team. Learn more on the Methodology page.
  • We show the Recommended Dietary Allowance (RDA) when available. If no RDA exists, we show the Adequate Intake (AI). Tolerable Upper Intake Levels (UL) are used for upper limits. Unless otherwise noted, RDAs shown correspond to healthy adults aged 19–50 years and are sex-specific. Separate values exist for 51–70 years and >70 years, and pregnancy and lactation are excluded. All values come from the Dietary Reference Intakes (DRIs) published by the National Academies of Sciences, Engineering, and Medicine (NASEM), Food and Nutrition Board (FNB).
  • Transparency: We’re funded by our users. We don’t have sponsors or affiliate links, and we don’t sell supplements.
  • Editorial standards: we provide independent, impartial and objective data analysis.
  • This analysis is for educational purposes only. It is not a substitute for medical advice.
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  • Author: VIOscan Research Team