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

• Immuni-V Lemon & Lime EffervescentMRI Performance4 mg
• Immuni-V Orange EffervescentMRI Performance4 mg
• Immuni-V Raspberry EffervescentMRI Performance4 mg
• Immuni-V Sour Apple EffervescentMRI Performance4 mg
• Immunity Health Strawberry Kiwi FlavorNutrilite5 mg
• Immunity Twist Tubes Stawberry Kiwi FlavorNutrilite · off the market5 mg
• Impact Igniter Sport Peach MangoALLMAX7 mg
• iNatal AdvanceZIKS20 mg
• iNatal UltraZIKS20 mg
• Incinerate-X Ice Blue Lemonade ColadaXLSN Xcel Sports Nutrition · off the market15 mg
• IncredivitesShakleekids20 mg
• Incredivites All-Natural Grape FlavorShakleeKids15 mg
• inergy PlusBetter Body Company10 mg
• Infant & Toddler Multivitamin Drops Natural Fruit FlavorRugby4 mg
• Infant & Toddler Multivitamin Drops with IronRugby4 mg
• Inflama TrimSource Naturals10 mg
• InflammaSelectMoss Nutrition150 mg
• Inflammatory HealthCymbiotika20 mg
• IngeniumGuardian Health7 mg
• INHUMAN Orange CreamsicleAfterDark20 mg
• Inner SolaceeXplicit Supplements28 mg
• Inner Sun4Life9.5 mg
• Inner-Getic Exotic PunchDNA Anabolics · off the marketin a blend
• Inno Drive For HerINNOSUPPS10 mg
• Inno Shred GLP-1INNOSUPPS15 mg
• Innospresso Original BlendINNOSUPPS · off the market10 mg
• Inositol HexanicotinateSuperSmart790 mg
• Insane Whey Birthday CakeInsane Labz0.07 mg as transcribed, likely a slip
• Insane Whey ChocolateInsane Labz0.07 mg as transcribed, likely a slip
• Insane Whey Cookies & CreamInsane Labz0.13 mg as transcribed, likely a slip
• Insane Whey Strawberries & CreamInsane Labz0.07 mg as transcribed, likely a slip
• Insane Whey VanillaInsane Labz0.07 mg as transcribed, likely a slip
• Inspira CellVerVita5 mg
• Insport RecoveryLiving Fuel · off the market5 mg
• Instant Clean Herbal CleanseDetoxify10 mg
• Instant Energy B12NOW20 mg
• Instant Energy Peppermint FlavorInstavit · off the market0.5 mg
• Instant Milk & Egg Protein Powder DrinkVitamin Worldin a blend
• IntegraUS Pharmaceutical Corporation3 mg
• Integra PlusUS Pharmaceutical Corporation20 mg
• IntellectThe Enclare Nutrition12.5 mg
• IntelleQAdvocare20 mg
• Intense DefenseWicked Fast Sports Nutrition22 mg
• Intense Pre-Workout Boost Citrus Burst FlavoredXS Energize20 mg
• Intensify BlackNDS20 mg
• Intensify BlackNDS Nutrition20 mg
• Intensify XtremeNDS Nutrition Products · off the market10 mg
• Intensify XtremeFitLife Brands10 mg
• Intensify XtremeNDS10 mg
• Internal SunshineMichael's Naturopathic Programs15 mg

Where next?

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