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

• Madness Blue RaspberryMutant20 mg
• Madness Fruit PunchMutant20 mg
• Mag Cal PlusGenestra Brands6.25 mg
• Mag-AmideEndurance Products Company500 mg
• Mag-Ni-SelJeunique · off the market260 mg
• Magic Strong PlusEsmond Natural10 mg
• Magna B-6 PlusNutri-West10 mg
• MagnesixDouglas Laboratories · off the market20 mg
• Magnesix Magnesium And B-6Douglas Laboratories20 mg
• Magnum DNAMagnum Nutraceuticals3 mg
• Magnum-75 Multi-Vitamin FormulaWindmill75 mg
• Magnus SupremeOmniLife74 mg
• MagSenseNatural Factors WS WomenSense20 mg
• MagSense Magnesium Glycinate FormulaNatural Factors WomenSense · off the market20 mg
• Male CompleteNature's Answer15 mg
• Male ComplexMBi Nutraceuticals80 mg
• Male EnhancementS2 Stamina Squared · off the market15 mg
• Male EnhancementDrFormulas5 mg
• Male EnhancementNatures Craft10 mg
• Male Enhancement +BioPerineApproved Science30 mg
• Male Fertility MFSG5Coast Science20 mg
• Male Fertility SupportNature's Craft20 mg
• Male Libido BoosterTotally Products10 mg
• Male LongevityVitarol · off the market20 mg
• Male MultinutrientBioCare50 mg
• Male MultipleSolgar60 mg
• Male NitroSource Naturals25 mg
• Male PerformanceCrystal Star7 mg
• Male PowerMaxNature's Answer · off the market15 mg
• Male RejuvenatorXtendlife63.1 mg
• Male Reproductive FactorsMNP Michael's Naturopathic Programs50 mg
• Male Reproductive FactorsMichael's Naturopathic Programs50 mg
• Male Reproductive FactorsMH Michael's Health Naturopathic Programs50 mg
• Male Super PackDouglas Laboratories90 mg
• Male V With HerbsGood 'N Natural · off the market45 mg
• Male VigorBodyHealth30 mg
• Malibu MiracleExotic OxyJuice0.4 mg
• Malibu Miracle MaintenanceDreamQuest Nutraceuticals · off the market3 mg
• Malt ExtractGM Germa16 mg
• Mama BirdBest Nest Wellness20 mg
• Mandarin OrangeAdvoCare60 mg
• Manetabolism PlusThe Mane Choice10 mg
• Manga-CalDC5 mg
• MangaPlexWonder Laboratories5 mg
• Mango B12 DropsInfiniti Creationsin a blend
• Marathon FormulaNutrina · off the market200 mg
• Marine Collagen 5.5 g UnflavoredNature's Sunshine16 mg
• Marine Coral Calcium ComplexCORALadvantage · off the market12.8 mg
• Marnatal-FMarnel20 mg
• Marvel The Amazing Spider-Man CompleteSundown10 mg

Where next?

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