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

• Neuro-Max IIMRM · off the market10 mg
• Neuro-Max IIMRM Nutrition10 mg
• Neuro-Natural MemoryXtendlife8 mg
• Neuro-VMFoster Regal50 mg
• NeuroActiv6 Natural Berry FlavorNatural Cell Supplements20 mg
• NeuroBion EnergyOTC Pharmaceutical Products18 mg
• NeuroMood Pure PackPure Encapsulations20 mg
• Neuron ComplexMBi Nutraceuticals60 mg
• NeuroplexSP Standard Process40 mg
• Neurosed IIDouglas Laboratories100 mg
• Neurosed II Tryptophan FreeDouglas Laboratories · off the market100 mg
• NeuroShieldHerbal Nutrition16 mg
• NeurosolMetagenics10 mg
• Neurosurge 2.0 Flavor GrapeNeogenix Performance Nutrition · off the market10 mg
• New Life Hair With CopperSundown Naturals35 mg
• New Life Hair With SilicaSundown Naturals · off the market16 mg
• New Look Advanced Hair Growth FormulaVivid Health Nutrition45 mg
• New MomHerbalife Nutrition18 mg
• New MoodOnnit30 mg
• New YouIt Works!10 mg
• NF Formulas PSI NighttimeIntegrative Therapeutics100 mg
• NF Formulas Spectrum 2C With IronIntegrative Therapeutics37 mg
• Nia PlusDouglas Laboratories330 mg
• NIA Slow SRAFI America's Finest500 mg
• Nia VascXYMOGEN · off the market500 mg
• Nia Vasc 750XYMOGEN · off the market750 mg
• Nia-ChromeDouglas Laboratories100 mg
• Nia-Chrome ForteDouglas Laboratories250 mg
• NiaCelThorne · off the market125 mg
• NiaCel 200Thorne · off the market207.5 mg
• NiaCel 400Thorne415 mg
• Niacel Nicotinamide RibosideThorne Research · off the market125 mg
• NiaCel-250Thorne · off the market250 mg
• Niacel-250 Nicotinamide RibosideThorne Research · off the market250 mg
• NiacinIntegrative Therapeutics · off the market590 mg
• NiacinSignature Care400 mg
• NiacinHard Rhino500 mg
• NiacinNutriCology250 mg
• NiacinMember's Mark400 mg
• NiacinNature's Sunshine250 mg
• Niacin (Inositol Hexanicotinate) 500 mgWindmill Natural Vitamins · off the market500 mg
• Niacin (Vitamin B3)BulkSupplements.com500 mg
• Niacin (Vitamin B3) 100 mgSolgar100 mg
• Niacin (Vitamin B3) 500 mgSolgar500 mg
• Niacin (Vitamin B3) 500 mg CapsulesBulkSupplements.com500 mg
• Niacin 1 g UnflavoredNutricost1,000 mg
• Niacin 1,000 mg CapsuleVitalBulk · off the market1,000 mg
• Niacin 100Biotics Research Corporation100 mg
• Niacin 100 mgVitamin World100 mg
• Niacin 100 mgEqualine100 mg

Where next?

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