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

• Poly-Vi-SolEnfamil8 mg
• Poly-Vi-Sol with IronEnfamil8 mg
• Poly-Vita Drops with IronMajor8 mg
• PolyflavonolWindmill Health Products10 mg
• Polyphenol NutrientsPure Encapsulations37.5 mg
• Polyvitamin DropsRugby8 mg
• Polyvitamin Drops With IronRugby8 mg
• Polyvitamin LiquidRugby8 mg
• Polyvitamin Liquid With Iron Delicious Natural Fruit FlavorRugby8 mg
• PolyviteD'Adamo Personalized Nutrition15 mg
• Pomegranate and Pineapple FlavorsArbonne10 mg
• Pomegranate Liquid Multi Vitamin & MineralSee Yourself Well10 mg
• Positive OutlookHigher Nature40 mg
• Post Peach MangoNutraBio15 mg
• Post Raw UnflavoredNutraBio · off the market15 mg
• Post WorkoutDyna Storm Nutrition · off the market20 mg
• Post-OpSurgery Vitamin · off the market20 mg
• Post-Op & Injury Recovery Support FormulaHealFast10 mg
• Post-Workout Recovery ChocolateAdvoCare20 mg
• Post-Workout Recovery VanillaAdvoCare20 mg
• Postnatal Multi + DHANature Made17 mg
• Postnatal MultivitaminNutricost20 mg
• Postnatal MultivitaminRainbow Light Vibrance · off the market30 mg
• Postnatal MultivitaminRainbow Light · off the market30 mg
• Postnatal MultivitaminNATURELO Premium Supplements18 mg
• PostNatal Multivitamin GummyCentrum18 mg
• Postnatal PlusMama's Select18 mg
• PostpartumNutrafol10 mg
• Potassium Aspartate+DaVinci Laboratories Of Vermont5 mg
• Potent-BPhysician's Strength6 mg
• Potent-C Energy Natural Orange FlavorNature's Plus · off the market10 mg
• PotentPakPhysician's Strength2.25 mg
• Potenza Fruit PunchBrain Forza30 mg
• Potenza Pre-Workout Fruit PunchBrain Forza · off the market30 mg
• Power ATP21st Century Organics · off the market140 mg
• Power CocktailFitLine46 mg
• Power Cocktail Junior Natural Orange FlavouredFitLine12.6 mg
• Power Energy-MultiDr. Seth's Vitamin Vibrations20 mg
• Power Greens Berry FlavorPatriot4 mg
• Power Greens Natural Berry FlavorWindmill Natural Vitamins16 mg
• Power Greens Premium Natural BerryNuMedica6 mg
• Power Greens Premium Refreshing BerryNuMedica6 mg
• Power Meal VanillaNature's Sunshine15 mg
• Power Mixed BerryCenegenics · off the market50 mg
• Power Multi-VCalifornia Academy of Health20 mg
• Power Multi-V Vegi CapsulesCalifornia Academy of Health25 mg
• Power Muscle-EzeDr. Seth's Vitamin Vibrations225 mg
• Power Nutrient Colloidal Vitamins And MineralsGPI · off the market20 mg
• Power Nutrient Cranberry FlavorNutrients for Health · off the market20 mg
• Power Nutrient Natural CranberryNutrients for Health16 mg

Where next?

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