vitamin

Niacin supplements

Half of the 12,413 niacin supplements in the NIH label database that print an amount list 20 mg or less per serving; the middle half list 13.2 mg to 48 mg, and 35% of the 12,334 with a plausible amount give more than the adult upper limit at the most servings their labels direct (DSLD version 9.4.0, January 2026). The 295 products whose only supplement ingredient is niacin list a median of 500 mg, and 98% of them give more than the upper limit.

How much niacin do supplements contain?

The median product lists 20 mg per serving. One in ten lists 5 mg or less, one in ten 100 mg or more. The amount printed most often is 20 mg (2,521 products).

How do the amounts compare with the Daily Value and the upper limit?

The FDA Daily Value for niacin is 16 mg (adults and children 4 and older). The median product gives 125% of it per serving; the 90th percentile 625%.

The adult Tolerable Upper Intake Level is 35 mg a day (synthetic forms from supplements and fortified foods). At the most servings their labels direct, 4,377 of the 12,334 products with a plausible amount (35.5%) give more than that from the supplement alone (what counts as plausible).

The upper limit is for total intake from food, water and supplements unless stated, and does not apply under medical supervision. A label amount is what the maker printed. This is data, not advice: the NIH ODS fact sheets explain what each nutrient does.

Which products list the most niacin?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

• NiaPlexKaruna1,000 mg
• Hb HDL BenefitPRN Physician Recommended Nutriceuticals1,000 mg
• Vitamin B3 Niacin 1000 mgLife Extension1,000 mg
• Niacinamide 1,000 mgNature's Life1,000 mg
• Memory BoostHighland Laboratories1,000 mg
• Timed Release Niacin 100 mgRugby1,000 mg
• First Step VitaminsVitalBulk1,000 mg
• Niacin 1000 mgVitalBulk1,000 mg

Have the amounts changed over the years?

Products whose current label entered DSLD in 2011 list a median of 26 mg; those entered in 2025, 20 mg.

In which products and brands?

Brands listing it most: Douglas Laboratories (253), Nature's Way (232), Nature's Plus (208), Bronson (96), Cellucor (92), Country Life (86), NOW (81), ProCaps Laboratories (79), Metagenics (78), Rainbow Light (75).

Every product listing niacin

12,779 products, A to Z by name (page 76 of 256), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• Estro Support21st Century20 mg
• Estro Support ES21st Century20 mg
• Estrogen EnhancementSkinnyBean1 mg
• EstroPrimeAllergy Research Group16 mg
• Eternal Energy BerryLXR Biotech33.33 mg
• Eternal Energy GrapeLXR Biotech33.33 mg
• EveNOW · off the market30 mg
• Eve Iron-Free CapsulesNOW30 mg
• Eve SoftgelsNOW25 mg
• Eve TabletsNOW30 mg
• Eventa Cellular Enzyme CorrectorSystemic Formulas20 mg
• Ever Clean Herbal Cleanse Honey Tea FlavorDetoxify · off the market2.5 mg
• Every ManNew Chapter Organics · off the market20 mg
• Every Man MultivitaminNew Chapter20 mg
• Every Man One Daily MultiNew Chapter · off the market20 mg
• Every Man's One DailyNew Chapter Organics20 mg
• Every Man's One Daily MultiNew Chapter16 mg
• Every Man's One Daily MultivitaminNew Chapter16 mg
• Every Man's One Daily Multivitamin 55+New Chapter16 mg
• Every Man's One Daily Whole-Food MultivitaminNew Chapter16 mg
• Every WomanNew Chapter Organics · off the market20 mg
• Every Woman MultivitaminNew Chapter20 mg
• Every Woman's One DailyNew Chapter Organics20 mg
• Every Woman's One Daily MultiNew Chapter20 mg
• Every Woman's One Daily MultivitaminNew Chapter16 mg
• Every Woman's One Daily Multivitamin 40+New Chapter16 mg
• Every Woman's One Daily Whole-Food MultivitaminNew Chapter16 mg
• Every Women's One Daily MultiNew Chapter · off the market20 mg
• Everyday Energy Natural Peach Tea Flavored Blendvitafusion20 mg
• Everyday Multi-VitaminKirkman20 mg
• EveryDay Multi-Vitamin W/O Vitamins A & DKirkman20 mg
• Everyday MultivitaminKirkman · off the market20 mg
• Everyday Multivitamin without A & DKirkman20 mg
• EvoviteEvogen50 mg
• Evovite Orange MangoEvogen Naturals50 mg
• EVP GrapeEvogen5 mg
• ExaktaD'Adamo Personalized Nutrition2.5 mg
• ExcelerolAccelerated Intelligence0.005 mg as transcribed, likely a slip
• ExcitaPlusNS NeuroScience20 mg
• Executive Stress FormulaDouglas Laboratories Ultra Preventive 2000 Series · off the market120 mg
• Executive Stress FormulaDouglas Laboratories90 mg
• ExileAmerican Muscle Sports Nutrition · off the market25 mg
• Exotic Red Super Fruits Adult's Multi-Vitamin Chewable Exotic Red Berry FlavorNature's Plus · off the market25 mg
• Exotic Red Super Fruits Adult's Multi-Vitamin Exotic Red Berry FlavorNature's Plus · off the market25 mg
• Explosive Energy MetabolizerGNC AMP Advanced Muscle Performance20 mg
• ExsporeNutri-West2.5 mg
• Extend CoreVitamin Research Products62.5 mg
• Extend PlusVitamin Research Products125 mg
• Extended Delivery Energy ShotNature's Plus Source of Life · off the market20 mg
• Extended Release Endur-Acin Wax Matrix Niacin 250 mgEP · off the market250 mg

Where next?

• Check an amount of niacin
• Labels above the upper limit
• All ingredients