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.
- Products listing it
- 12,77912,413 print an amount; 359 list it inside a blend without an amount
- Median per serving
- 20 mgmiddle half 13.2 mg to 48 mg
- FDA Daily Value
- 16 mgthe median is 125% of it
- Adult upper limit (IOM)
- 35 mg4,377 products go above it a day
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).
Products by amount of niacin per serving
12,413 products, log scale; extreme 0.2% at each end left out of the drawing.
Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).
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.
Sources: 21 CFR 101.9(c)(8)(iv) (Daily Values); Institute of Medicine, DRI summary tables (2011) (upper limits); on reading them, the FDA's Daily Value page.
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.
| Year | Products | Median per serving |
|---|---|---|
| 2011 | 287 | 26 mg |
| 2012 | 850 | 25 mg |
| 2013 | 1,066 | 20 mg |
| 2014 | 648 | 20 mg |
| 2015 | 635 | 20 mg |
| 2016 | 566 | 20.2 mg |
| 2017 | 637 | 25 mg |
| 2018 | 565 | 20 mg |
| 2019 | 679 | 20 mg |
| 2020 | 1,065 | 20 mg |
| 2021 | 1,006 | 20 mg |
| 2022 | 1,181 | 20 mg |
| 2023 | 997 | 20 mg |
| 2024 | 1,185 | 20 mg |
| 2025 | 1,046 | 20 mg |
Source: DSLD label entry dates and amounts, current labels.
In which products and brands?
Products listing niacin by DSLD product type
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 221 of 256), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Thera-BProThera · off the market50 mg
- Thera-BKlaire Labs · off the market50 mg
- Thera-MPlus Pharma30 mg
- Thera-MMajor20 mg
- Thera-MGeri-Care20 mg
- Thera-TabsGeri-Care20 mg
- Thera-Tabs MGeri-Care20 mg
- TheraBetic Multi-VitaminWindmill50 mg
- Theramill ForteMiller Pharmacal Group34 mg
- TheraNatal Complete Pink TabletTheralogix Nutritional Science20 mg
- TheraNatal OvaVite TabletTheralogix Nutritional Science20 mg
- Therapeutic FormulaBronson Laboratories · off the market20 mg
- Therapeutic FormulaBronson20 mg
- Therapeutic Formula High Potency Vitamin & Mineral FormulaBronson · off the market20 mg
- Therapeutic Formula Without IronBronson Laboratories · off the market20 mg
- Therapeutic Formula without IronBronson20 mg
- Therapeutic-M21st Century20 mg
- Therapeutic-M with Lutein21st Century · off the market20 mg
- TheraSport Recovery EnhancerBody Basics25 mg
- Theratrum CompleteNature's Blend20 mg
- Theravim-MNature's Bounty20 mg
- TheremsRugby20 mg
- Therems-HRugby33.3 mg
- Therems-MRugby20 mg
- Thermal Infusion X2MET-Rx14 mg
- Thermal Mandarina SolGlaxon50 mg
- Thermo BurnYoli40 mg
- Thermo Burst HardcoreGNC Pro Performance20 mg
- Thermo Fat BurnApex · off the market33 mg
- Thermo Heat MultiAML Advanced Molecular Labs40 mg
- Thermo Hydroxadrine Nitric Xplosion Blazing PunchANSI Advanced Nutrient Science Intl40 mg
- Thermo Igniter 12XGNC Pro Performance AMP Advanced Muscle Performance20 mg
- Thermo Igniter 12XGNC Pro Performance20 mg
- Thermo Igniter 12xGNC Pro Performance AMP20 mg
- Thermo Igniter 12XGNC AMP Advanced Muscle Performance20 mg
- Thermo InfernoGNC Pro Performance AMP · off the market20 mg
- Thermo InfernoGNC AMP Advanced Muscle Performance20 mg
- Thermo RushMET-Rx50 mg
- Thermo Rush Fruit PunchMET-Rx50 mg
- Thermo Tropic Shake Natural Mixed Berry FlavorNature's Plus · off the market20 mg
- Thermo-RevNeon Sport5 mg
- Thermo-XNugenix16 mg
- Thermocut 800Totally Products20 mg
- ThermocutsInfiniti Creations20 mg
- Thermodynamic PreWorkout ExtenderBody Lab · off the market20 mg
- ThermofastEST25 mg
- Thermogenic Energy FactorsCalifornia Academy of Health25 mg
- ThermoKalMetabolic Nutrition20 mg
- ThermoplusAdvocare20 mg
- ThermoscorchNutracore Nutrition · off the marketin a blend