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 103 of 256), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- IntestiCleanse ChocolatePure TheraPro Rx40 mg
- IntestiCleanse VanillaPure TheraPro Rx40 mg
- Intestinal/GI Support PackDouglas Laboratories120 mg
- Intra Amino Fresh WatermelonAdaptogen Science · off the market20 mg
- Intra Amino Pineapple CoconutAdaptogen Science · off the market20 mg
- Intra Amino Strawberry KiwiAdaptogen Science · off the market20 mg
- intraKID All-In-One All Natural Fresh Raspberry TasteDrucker Labs · off the market20 mg
- intraKID All-In-One All Natural Raspberry FlavorDrucker Labs20 mg
- intraMAX 2.0 Peach Mango FlavorDrucker Labs30 mg
- Invigorate NowInvigorate NOW · off the market40 mg
- Ion Blue IcePerformix30 mg
- Ion Ice PunchPerformix30 mg
- Ionix Supreme Natrural Fruit FlavorIsagenix13 mg
- Ionix Supreme Natural Fruit FlavorIsagenix13 mg
- Irom Free All-In-One MultivitaminThompson20 mg
- Iron AllPuritan's Pride0.5 mg
- Iron BeardZHOU5 mg
- Iron Free AVED-MultiAnabolic Laboratories · off the market60 mg
- Iron Free Basic MultiVitamer Laboratories20 mg
- Iron Free Daily Multiple 50+Sundown Naturals20 mg
- Iron Free Full of Energy Senior MultiVitaCeuticals Laboratories20 mg
- Iron Free Green SourceGood 'N Natural · off the market25 mg
- Iron Free Just OnceRainbow Light · off the market30 mg
- Iron Free Maximum OneVitaCeutical Labs100 mg
- Iron Free Multi CapsVitaCeutical Labs50 mg
- Iron Free Multi CapsVitamer Laboratories50 mg
- Iron Free Multi Super DailyVitaCeutical Labs · off the market100 mg
- Iron Free One Daily Essential Multiple VitaminsLongs Wellness · off the market20 mg
- Iron Free One Daily MultipleVitaCeutical Labs20 mg
- Iron Free Quintabs MFreeda100 mg
- Iron Free Ultimate OneVitamer Laboratories100 mg
- Iron Grape Flavor GummiesBeLive10 mg
- Iron Gummies GrapeLifeCentric Health10 mg
- Iron Multivitamin Premium Grape FlavorOso Yummy10 mg
- Iron SAPNFH4.5 mg
- Iron TabletsFloradix4.5 mg
- Iron Tek Beet Energizer Watermelon flavorCountry Life3.6 mg
- Iron Tek Hydro Recovery Coconut flavorCountry Life3.6 mg
- Iron Vegan Gummies Strawberry FlavorVitamin Friends2 mg
- Iron-Free Formula VM-75Solgar75 mg
- Iron-Free Men's Once DailyVitaCeutical Labs25 mg
- Iron-Free Men's Once DailyVitamer Laboratories25 mg
- Iron-Free Multi OneBluebonnet · off the market25 mg
- Iron-Free MultipleSolgar25 mg
- Iron-Free OrthoLiquid Multi Liquid Vitamin & Mineral Tropical Orange FlavorProtocol For Life Balance25 mg
- Iron-Free Source of Life MenNatures Plus Source of Life · off the market75 mg
- Iron-Free Source of Life MenNaturesPlus Source of Life75 mg
- Iron-Free Ultra INatures Plus · off the market100 mg
- Iron-Free Vegan Multivitamin & Mineral SupplementDEVA50 mg
- Iron-Free Vit-Min 75+NOW75 mg