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

• Prenatal 19Cypress Pharmaceutical · off the market15 mg
• PreNatal 19 Chewable TabletsNationwide Laboratories · off the market15 mg
• PreNatal 19 TabletsNationwide Laboratories · off the market15 mg
• Prenatal Activated MultivitaminIsotonix20 mg
• Prenatal Advanced Care Vitamins & Minerals with 5-MTHFKirkman20 mg
• Prenatal AdvantageLife Extension18 mg
• Prenatal All-in-One Softgel Folic Acid + DHA + CholineNature Made18 mg
• PreNatal BlendSuperNutrition · off the market122 mg
• Prenatal BlendSuper Nutrition61 mg
• Prenatal CapsNOW20 mg
• Prenatal Chewable Vitamins with Iron, Calcium and Folic AcidBellybar · off the market20 mg
• Prenatal CompleteAmeriSciences · off the market20 mg
• Prenatal CompleteSmartyPants Organics · off the market18 mg
• Prenatal CompleteSmartyPants · off the market20 mg
• Prenatal CompleteNewtonEverett20 mg
• Prenatal CompleteBIOVEA20 mg
• Prenatal CompleteWonder Labs20 mg
• Prenatal Complete with DHAOrtho Molecular Products25 mg
• Prenatal ComplexOL Olympian Labs20 mg
• Prenatal Daily NutritionCountry Life Realfood Organics · off the market21 mg
• Prenatal DHANoor Vitamins20 mg
• Prenatal DHA + FolateSalaam Nutritionals21 mg
• Prenatal DHA plus ProbioticsGreens First Female · off the market20 mg
• Prenatal DHA+ GingerNoor Vitamins18 mg
• Prenatal EssentialsWhole Foods20 mg
• Prenatal EssentialsSeeking Health25 mg
• Prenatal EssentialsXYMOGEN · off the market25 mg
• Prenatal EssentialsProCaps Laboratories20 mg
• Prenatal Essentials ChewableSeeking Health25 mg
• Prenatal Essentials Methyl-FreeSeeking Health25 mg
• Prenatal Folic AcidNature Made18 mg
• Prenatal Folic Acid + DHANature Made18 mg
• Prenatal FormulaNature Made · off the market18 mg
• Prenatal FormulaProThera · off the market20 mg
• Prenatal FormulaGNC Women's18 mg
• Prenatal FormulaSmartyPants PhD18 mg
• Prenatal FormulaSmartyPants Organics18 mg
• Prenatal FormulaSmartyPants4 mg
• Prenatal Formula With DHAGNC Women's18 mg
• Prenatal Formula with Folic AcidRite Aid Pharmacy20 mg
• Prenatal Formula with IronGNC · off the market18 mg
• Prenatal Formula With IronGNC Women's18 mg
• Prenatal Formula without IronGNC · off the market18 mg
• Prenatal Formula without IronGNC Women's18 mg
• Prenatal ForteIntegrative Therapeutics8 mg
• Prenatal Gels + DHAButterfly Express · off the market13 mg
• Prenatal Gels + DHANOW13 mg
• Prenatal GummyGNC Women's · off the market20 mg
• Prenatal Gummy Lemon & Raspberry LemonadeGNC Women's · off the market20 mg
• Prenatal Gummy Multivitamins Fruit Flavorsup&up20 mg

Where next?

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