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

• Flex-Free Joint Support ComplexBioGanix · off the market1 mg
• FlexeraWorld Nutrition · off the market30 mg
• Flintstones + Immunity SupportBayerin a blend
• Flintstones CompleteBayer24 mg
• Flintstones Kids Mutivitamin Fruit BitesBayer16 mg
• Flintstones MultivitaminBayer10 mg
• Flintstones plus Bone Building SupportBayer13.5 mg
• Flintstones plus Immunity SupportBayer · off the market10 mg
• Flintstones SuperbeansBayer8 mg
• Flintstones ToddlerBayer6 mg
• Flintstones with IronBayer8 mg
• Flo Fusion BerryCelsius20 mg
• Flo Fusion OrangeCelsius20 mg
• Flora IronFlora8 mg
• Floradix Iron TabletsFlora4.5 mg
• Floriva Plus Liquid Drops 0.25 mg Natural Berry FlavorBonGeo Pharmaceuticals2 mg
• Flush Free NiacinNature's Bounty · off the market400 mg
• Flush Free NiacinExchange Select · off the market400 mg as transcribed, likely a slip
• Flush Free NiacinNova Nutritions400 mg
• Flush Free Niacin 1000 mgVitamin World800 mg
• Flush Free Niacin 500 mgVitamin World400 mg
• Flush Free Niacin 500 mgFoods Plus500 mg
• Flush Free Niacin 500 mgFamily Wellness400 mg
• Flush Free Niacin 500 mgBasic Vitamins400 mg
• Flush Free Niacin 500 mgNusaPure500 mg
• Flush Free Niacin Inositol Hexanicotinate 500 mgGood 'N Natural · off the market400 mg
• Flush Free Niacin Inositol Hexanicotinate 500 mgNature's Bounty · off the market400 mg
• Flush Free Niacin Inositol Hexanicotinate 500 mgCVS Pharmacy400 mg
• Flush Free Niacin Inositol Hexanicotinate 500 mgPhysioLogics · off the market400 mg
• Flush Free Niacin Inositol Hexanicotinate 500 mgSundown Naturalist400 mg
• Flush Free Niacin Inositol Hexanicotinate 500 mgCVS Health400 mg
• Flush Free Niacin Inositol Nicotinate 500 mgPuritan's Pride400 mg
• Flush-Free NiacinFinest Nutrition400 mg
• Flush-Free NiacinNew You Vitamins · off the market500 mg
• Flush-Free NiacinTerry Naturally500 mg
• Flush-Free NiacinIntegrative Therapeutics590 mg
• Flush-Free Niacin (Inositol Nicotinate)BulkSupplements.com500 mg
• Flush-Free Niacin 250 mgDouglas Cooper Co.500 mg
• Flush-Free Niacin 250 mgNOW500 mg
• Flush-Free Niacin 400 mgCountry Life · off the market400 mg
• Flush-Free Niacin 500 mgQuest · off the market500 mg
• Flush-Free Niacin 500 mgPatient One 1 MediNutritionals500 mg
• Flush-Free Niacin 500 mgBluebonnet500 mg
• Flush-Free Niacin 500 mgLongevity Medical Clinic500 mg
• Flush-Free Niacin 500 mgProtocol For Life Balance500 mg
• Flush-Free Niacin Hexancotinate 320 mgNOW · off the market500 mg
• Flush-Free Niacin Inositol Hexanicotinate 500 mgSpring Valley400 mg
• FM Support PackDouglas Laboratories100 mg
• FocusCognizance12.5 mg
• FocusQualia16 mg

Where next?

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