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

• EnergyFizz Raspberry FlavorArbonne10 mg
• EnergyFizz Strawberry FlavorArbonne10 mg
• EnergyFizz Tart Cherry FlavorArbonne · off the market10 mg
• EnergyFizz Watermelon FlavorArbonne10 mg
• EnergyMDPremium Certified25 mg
• Energysyl +BioPerineApproved Science · off the market25 mg
• Enervimin Stress FocusEnergique Nutrition120 mg
• EnerVitalSource Naturalsin a blend
• ENGN Pre-Workout Blue RazEvlution Nutrition35 mg
• ENGN Pre-Workout Cherry LimeadeEvlution Nutrition35 mg
• ENGN Pre-Workout Engine Blue RazEvlution Nutrition · off the market35 mg
• ENGN Pre-Workout Engine Fruit PunchEvlution Nutrition35 mg
• ENGN Pre-Workout Engine Furious GrapeEvlution Nutrition35 mg
• ENGN Pre-Workout Engine WatermelonEvlution Nutrition35 mg
• ENGN Pre-Workout Pink LemonadeEvlution Nutrition35 mg
• ENGN Pre-Workout Pink StarblastEvlution Nutrition35 mg
• ENGN Pre-Workout Ring CandyEvlution Nutrition35 mg
• ENGN Shred Pre-Workout Blue RazEvlution Nutrition35 mg
• ENGN Shred Pre-Workout Cherry LimeadeEvlution Nutrition35 mg
• ENGN Shred Pre-Workout Engine Shred Blue RazEvlution Nutrition · off the market35 mg
• ENGN SHRED Pre-Workout Engine Shred Cherry LimeadeEvlution Nutrition · off the market35 mg
• ENGN SHRED Pre-Workout Engine Shred Fruit PunchEvlution Nutrition · off the market35 mg
• ENGN Shred Pre-Workout Engine Shred GrapeEvlution Nutrition · off the market35 mg
• ENGN Shred Pre-Workout Engine Shred Pink LemonadeEvlution Nutrition35 mg
• ENGN Shred Pre-Workout Fruit PunchEvlution Nutrition35 mg
• ENGN Shred Pre-Workout GrapeEvlution Nutrition35 mg
• Enhanced Electrolytes Black CherryZeal Naturals20 mg
• Enhanced Electrolytes Raspberry GuavaZeal Naturals20 mg
• Enhanced Energy Once Daily Whole Food MultivitaminKAL20 mg
• Enhanced Energy Teen Stay Sharp MultivitaminKAL30 mg
• Enhanced Energy Whole Food Multivitamin Mango Pineapple FlavorKAL20 mg
• Enhanced FocusENP20 mg
• Enhanced MultivitaminDivine Health16 mg
• Enhanced QM-1Country Life40 mg
• Ennercell Island PunchEST · off the market22.5 mg
• eNRG LQ Quantum Cellular ATP EnergySystemic Formulasin a blend
• eNRG Quantum Cellular ATP EnergySystemic Formulas30 mg
• Entire Family! MultiVitaminHerbaSway Laboratories20 mg
• Enz-Factors PlusDouglas Laboratories10 mg
• Enzyme Nutrition Multi-Vitamin Two DailyEnzymedica · off the market20 mg
• Enzyme Nutrition Multi-Vitamin Women'sEnzymedica20 mg
• Enzyme Nutrition Multi-Vitamin Women's 50+Enzymedica19 mg
• EnzyteVianda20 mg
• Enzyte E3 Triple IntensityVianda20 mg
• Eo2 VmaxMRI Endurance5 mg
• EP BalancePlusEvinceNaturals16.7 mg
• EPD Basic MultivitaminAllergy Research Group20 mg
• EPD Basic MultiVitaminNutriCology20 mg
• EPD FormulaDouglas Laboratories · off the market190 mg
• EPD II FormulaDouglas Laboratories190 mg

Where next?

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