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

• Cardio MiracleCardio Miracle8 mg
• Cardio Mixed Berry FlavorLife's Fortune10 mg
• Cardio ProtectBioGenesis Nutraceuticals · off the market225 mg
• Cardio SupportVitabase25 mg
• Cardio SupportOnly Natural · off the market20 mg
• Cardio SupportAN Amazing Nutrition Amazing Formulas20 mg
• Cardio Support SoftgelsVitaCeutical Labs14 mg
• Cardio Support SoftgelsVitamer Laboratories · off the market14 mg
• Cardio Total HealthMartin Avenue Pharmacy120 mg
• Cardio-CareHealthy Items20 mg
• Cardio-KlenzXtendlife0.8 mg
• Cardio-Lyph ChelateNutri-West10 mg
• Cardio-PlusSP Standard Process14 mg
• Cardio-Plus GFSP Standard Process · off the market14 mg
• CardioDailyCardioTabs20 mg
• CardioFitMD Berry Lemonade1MD Nutrition20 mg
• CardioFlow with EDTARoex20 mg
• CardioMAXRenue By Science125 mg
• Cardiovascular Health PackDouglas Laboratories120 mg
• CarniSlim 1250ProCaps Laboratories2 mg
• CarniSlim 250ProCaps Laboratories5 mg
• Carnitine 2000 mgILN Iron Labs Nutrition4 mg
• Carnitine Liquid 3000 Sour Gummy WormCutler Nutrition16 mg
• CarnitrimBlackstone Labs50 mg
• Carnivor Blue RaspberryMuscleMeds8.2 mg
• Carnivor Cherry VanillaMuscleMeds8.2 mg
• Carnivor ChocolateMuscleMeds8.2 mg
• Carnivor Fruit PunchMuscleMeds8.2 mg
• Carnivor Mass Chocolate MacaroonMuscleMeds28 mg
• Carnivor Vanilla CaramelMuscleMeds8.2 mg
• Carrot-Tein High Protein Energy Meal With Natural Beta CaroteneNature's Plus · off the market20 mg
• Casein Complete Chocolate Fudge BrownieNutracore Nutrition · off the marketin a blend
• Castle Blue RaspberryRoyal Sport · off the market20 mg
• Castle Fruit PunchRoyal Sport · off the market20 mg
• CatalystMannatech10 mg
• Cataplex BSP Standard Process20 mg
• Cataplex B-GFSP Standard Process · off the market20 mg
• Cataplex GSP Standard Process · off the market12 mg
• Cataplex GTFSP Standard Process9.5 mg
• Caveman Hair NutrientsElevate Recovery Supplements · off the market30 mg
• CelebrateONE 45 with Iron Midnight CherryCelebrate40 mg
• CelebrateONE 45 with Iron Tropical TwistCelebrate40 mg
• CelebrateONE Stawberry CremeCelebrate40 mg
• Celi-Vites For Balanced BodyHealthGluten Free Therapeutics20 mg
• Cell K.E.M. PR Sour Watermelon FlavorEvogen Nutrition5 mg
• Cell KEM PR Raspberry LemonadeEvogen5 mg
• Cell-ImmuneNatural Healthy Concepts15 mg
• CellGenixCG CellGenix10 mg
• Cellular CardioCountry Life4 mg
• Cellular EnergyNature's Sunshine2.5 mg

Where next?

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