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

• CitraNatal 90 DHA Prenatal TabletsMission Pharmacal CitraNatal20 mg
• CitraNatal 90 DHA Rx Prenatal Supplement TabletMission Pharmacal CitraNatal20 mg
• CitraNatal 90 DHA Rx Prenatal TabletMission Pharmacal CitraNatal20 mg
• CitraNatal Assure Prenatal TabletMission Pharmacal CitraNatal20 mg
• CitraNatal Assure Prenatal Vitamin TabletMission Pharmacal CitraNatal20 mg
• CitraNatal Assure Rx Prenatal Supplement TabletMission Pharmacal CitraNatal20 mg
• CitraNatal Assure Rx Prenatal TabletMission Pharmacal CitraNatal20 mg
• CitraNatal DHA Prenatal TabletMission Pharmacal CitraNatal20 mg
• CitraNatal DHA Prenatal Vitamin TabletMission Pharmacal CitraNatal · off the market20 mg
• CitraNatal RxMission Pharmacal CitraNatal20 mg
• Citrate Formula Basic Nutrients III Without Copper And IronThorne Research · off the market160 mg
• Citrate Formula Basic Nutrients IV With Copper And IronThorne Research · off the market26 mg
• CitriBoostShaklee20 mg
• Citrin PlusDaVinci Laboratories Of Vermont · off the market0.7 mg
• CLA Shake Dark ChocolateAb Cuts Sleek & Leanin a blend
• Clarity Daily NootropicThrivous100 mg
• Clarity Natural Berry FlavorTransformations Medical Weight Loss20 mg
• Clark All-in-OneDr. Clark Research Association Dr. Clark Zentrum77 mg
• Clarocet CSClarocet · off the market10 mg
• Clarocet ERTClarocet · off the market10 mg
• Clarocet JuniorClarocet · off the market2 mg
• Clarocet NRIClarocet · off the market10 mg
• Clarocet PMClarocet · off the market5 mg
• ClassicReliv20 mg
• Classic PrenatalRugby20 mg
• Clean Energy Natural Citrus FlavorAIVIA6 mg
• Clean Isolate CappuccinoGEC Genetic Edge Compounds4 mg
• Clean Isolate Wild BerryGEC Genetic Edge Compounds4 mg
• Clean Pre Workout Raspberry Lemonade FlavorTrace Minerals Research5 mg
• Clean Pre-Workout Fruit PunchBSN20 mg
• Clean SlateReset/36023 mg
• Cleanse & Lean AdvancedMM Sports Nutrition20 mg
• Cleanse For Life Natural Rich BerryIsagenix4 mg
• Clear AirwaysVitinity · off the market60 mg
• Clear Change Daily EssentialsMetagenics398 mg
• Clear EnergyGarden of Life20 mg
• Clear Response VanillaInnate Response Formulas10 mg
• Clear Sound 911PhytAge Labs14 mg
• ClearfaceCodeage · off the market25 mg
• Clearface Vitamins+Codeage25 mg
• Clincally Advanced Hair, Skin & NailsNOW Solutions · off the market18 mg
• Clinical Cholesterol/Anti-Homocysteine SupportNatural Clinician80 mg
• Clinical EssentialsTerry Naturally25 mg
• Clinical Formula Hair VitaminsHair La Vie18 mg
• Clinical LibidoNatural Clinician26.66 mg
• Clinical Nutrients 45 - Plus WomenIntegrative Therapeutics90 mg
• Clinical Nutrients 50-Plus MenIntegrative Therapeutics · off the market120 mg
• Clinical Nutrients 50-Plus Men Iron-FreeIntegrative Therapeutics120 mg
• Clinical Nutrients for Female TeensIntegrative Therapeutics45 mg
• Clinical Nutrients for Male TeensIntegrative Therapeutics45 mg

Where next?

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