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

• ExtressVaxa15 mg
• Eye & Body CompleteBiosyntrx · off the market25 mg
• Eye AntioxidantBluebonnet20 mg
• Eye ComplexDr. Rico Perez20 mg
• Eye HealthGNC Mega Men50 mg
• Eye HealthGNC Women's Ultra Mega50 mg
• Eye HealthMax Drive Nutrition40 mg
• Eye Vitamins 2020eXplicit Supplements40 mg
• EZ FlexMetagenics250 mg
• Fabulous HairLogos Nutritionals30 mg
• FaceXXViatrexx Bio Incorporatedin a blend
• FamilyGarden of Life Vitamin Code20.8 mg
• Family Essentials Multi-Vitamin+D Fruit Chews Mixed Berry FlavorDr Sears · off the market7.5 mg
• Family Multi Mixed Berry FlavorNatures Plus Source of Life Garden · off the market1 mg
• Fast & Be ClearAllergy Research Group5 mg
• Fast Charge Berry Crush Flavoramino VITAL5 mg
• Fast Charge Orange Zest Flavoramino VITAL5 mg
• Fast Dissolving B-Complex With Folic Acid Strawberry BananaGNC · off the market20 mg
• Fast Dissolving Multivitamin Strawberry BananaGNC · off the market20 mg
• Fast Relief Nerve Health SupportPlexus12.5 mg
• Fast-Shake ChocolateQuickTrim20 mg
• Fast-UpBeverly International40 mg
• Fasted XTOutlaw Laboratory · off the market20 mg as transcribed, likely a slip
• FastFuel Lean Complex ChocolateLife Time Fitness · off the market7 mg
• FastFuel Lean Complex VanillaLife Time Fitness · off the market7 mg
• Fastin Multi-Vite For HerHi-Tech Pharmaceuticals24 mg
• Fat Burner NightlyDr. Tobias1 mg
• Fatigue FormulaMicroTech Professional Formulations40 mg
• Fatigued to Fantastic! Energy Revitalization System Berry FlavoredNature's Way · off the market50 mg
• Fatigued to Fantastic! Energy Revitalization System Tropical Citrus FlavorNature's Way50 mg
• FeelFit Pea Protein Shake Banana Pancake FlavorArbonne · off the market4.8 mg
• FeelFit Pea Protein Shake Chocolate FlavorArbonne4.8 mg
• FeelFit Pea Protein Shake Coffee FlavorArbonne4.8 mg
• FeelFit Pea Protein Shake Raspberry Truffle FlavorArbonne4.8 mg
• FeelFit Pea Protein Shake Simply1 Chocolate FlavorArbonne4.8 mg
• FeelFit Pea Protein Shake Simply1 Coffee FlavorArbonne4.8 mg
• FeelFit Pea Protein Shake Simply1 Peppermint Mocha FlavorArbonne4.8 mg
• FeelFit Pea Protein Shake Simply1 Strawberry FlavorArbonne4.8 mg
• FeelFit Pea Protein Shake Simply1 Vanilla FlavorArbonne4.8 mg
• FeelFit Pea Protein Shake Vanilla FlavorArbonne4.8 mg
• Fem EssentialsMetagenics420 mg
• Fem PrenatalMetagenics35 mg
• Fem-BasicDouglas Laboratories10 mg
• Fem-ViteVinco's20 mg
• Femagen Iron PlusGenestra Brands30 mg
• Femagen PMS CapsulesGenestra Brands9 mg
• Femagen PMS TabletsGenestra Brands15 mg
• Femagen TabletsGenestra Brands · off the market15 mg
• Femagen TLIGenestra Brands30 mg
• FemaleCustom Health Centers1 mg

Where next?

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