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 6 of 256), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• ActiveGNC Women's Ultra Mega50 mg
• Active 50+ Once Daily Multivitamin & Mineral Plus Probiotics (Digestive Support)Trader Joe's30 mg
• Active 55Buried Treasure Liquid Nutrients50 mg
• Active 55 Plus Senior ComplexBuried Treasure · off the market50 mg
• Active Adult 50+Rainbow Light · off the market24 mg
• Active Adult 50+ MultivitaminRainbow Light · off the market24 mg
• Active Adult Multivitamin Gummies with Co Q-10Sundown Naturals · off the market10 mg
• Active B CompleteOnnit20 mg
• Active B ComplexProThera · off the market60 mg
• Active B ComplexGenestra Brands100 mg
• Active B ComplexKlaire Labs · off the market60 mg
• Active B ComplexCarotec50 mg
• Active B ComplexCarlson30 mg
• Active B-ComplexIntegrative Therapeutics100 mg
• Active ChocolateGNC Women's Ultra Mega50 mg
• Active FEAllegis Pharmaceuticals20 mg
• Active Health TeenRainbow Light · off the market30 mg
• Active Health Teen MultivitaminRainbow Light · off the market30 mg
• Active ImmunityAkasha Naturals26 mg
• Active Kids CompleteOneSource · off the market10 mg
• Active Kids Plus Extra COneSource · off the market1.5 mg
• Active ManMET-Rx60 mg
• Active Man's FormulaVitabase50 mg
• Active Men's Alpha-MultiVivid Health Nutrition30 mg
• Active Methylated B ComplexApproved Science25 mg
• Active Milk ChocolateGNC Women's Ultra Mega50 mg
• Active Mixed BerryGNC Ultra Mega Green25 mg
• Active MultiFINAFLEX25 mg
• Active Multi PacksMET-Rx50 mg
• Active Multi ViteGenestra Brands31 mg
• Active Multi Vite Gummies Natural Raspberry-Lemon FlavorGenestra Brands11 mg
• Active Multi Vite Without Vitamin AGenestra Brands31 mg
• Active One Multi with IronSwanson Premium Brand · off the market25 mg
• Active Peach MangoPlexus20 mg
• Active SeniorRainbow Light · off the market30 mg
• Active Senior SafeGuard MultivitaminRainbow Light · off the market30 mg
• Active Seniors UnflavoredAll One100 mg
• Active VanillaGNC Women's Ultra Mega50 mg
• Active Vanilla CremeGNC Women's Ultra Mega50 mg
• Active Vanilla FlavorReliv5 mg
• Active Vitamin PackKirkland Signature70 mg
• Active without IronGNC Women's Ultra Mega50 mg
• Active WomanMet-Rx60 mg
• Active Woman's MultiVitabase50 mg
• Active Women's MultivitaminSuper Nutrition50 mg
• ActiveEssentialsXYMOGEN · off the market32 mg
• ActiveMVdotFIT15 mg
• ActivEssentialsXYMOGEN · off the market32 mg
• ActivEssentials For WomenXYMOGEN · off the market32 mg
• ActivEssentials with CalciumXYMOGEN · off the market32 mg

Where next?

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