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

• Kids Multi Orange Vanilla FlavorVitaMist3 mg
• Kids Multi-Vitamin on the Go! Wildberry Mist24hr Health · off the market2.5 mg
• Kids Multipops Grape FlavorNutrilite15 mg
• Kids Multis Berry Blast FlavorLuckyVitamin20 mg
• Kids Multitarts MultivitaminNutrilite20 mg
• Kids Multivitamin Berry Citrus Flavored GummiesNew Chapter2.1 mg
• Kids Multivitamin Drops Orange FlavorNature's Craft2 mg
• Kids Multivitamin Mixed Berry FlavoredDr. Berg5 mg
• Kids Multivitamin PowderGarden of Life2 mg
• Kids Multivitamin Powder Fruit Punch FlavorCountry Life Realfood Organics3.5 mg
• Kids Multivitamins Very BerryEspira by Avon16 mg
• Kids Natural CALM Multi Fruity Splash FlavorNatural Vitality5 mg
• Kids Natural CALM Multi Organic Fruity Splash FlavorNatural Vitality · off the market5 mg
• Kids Non-GMO Multivitamin Fruit Punch FlavorSundown Naturals5 mg
• Kids One DailyMegaFood7 mg
• Kids One Daily Multivitamin Soft Chews GrapeMegaFood7 mg
• Kids One Daily Multivitamin Soft Chews Grape FlavorMegaFood7 mg
• Kids Optimal MultivitaminSeeking Health75 mg
• Kids Optimal Multivitamin Iron-and Copper-FreeSeeking Health · off the market75 mg
• Kids SprayMarz Sprays10 mg
• Kids Super Vitamins Mixed Berry FlavoredOrgain · off the market7.2 mg
• Kids Vita Plus Natural Orange FlavorGuardian Health5 mg
• Kids Vitamins & Minerals Chewable Natural Black Cherry FlavorSolaray16 mg
• Kids Yummy Cherry BerryGarden of Life Vitamin Code · off the market20 mg
• Kids' MultiNatrol Gummies · off the market16 mg
• Kids' Multi-VitaminTropical Oasis20 mg
• Kids' Multivitamin Completeup&up15 mg
• KidsActive Fruit Punch FlavorZahler · off the market18 mg
• KidsActive Fruit Punch FlavorAdvanced Nutrition by Zahler18 mg
• Kidstiks Groovy GrapeAmerican Health5 mg
• Kidstiks Tropical PunchAmerican Health5 mg
• Kidz 250 mg Vitamin C Fruit PunchEmergen-C4 mg
• Kidz Vitamin C 250 mg Fruit GrapeEmergen-C5 mg
• Kidz Vitamin C 250 mg Fruit OrangeEmergen-C5 mg
• Kidz Vitamin C 250 mg Fruit PunchEmergen-C4 mg
• Kill Cliff The Recovery DrinkKill Cliff6 mg
• Kill It Fruit PunchRich Piana 5% Nutrition30 mg
• Kill It Reloaded Blue RaspberryRich Piana 5% Nutrition30 mg
• Kill It Reloaded Cosmic CandyRich Piana 5% Nutrition30 mg
• Kill It Reloaded Fruit PunchRich Piana 5% Nutrition30 mg
• Killer BeesHypergenetic Labs20 mg
• Kinder LoveFloradix4.5 mg
• Kinder LoveFlora9.8 mg
• Kindermins Natural Fruit FlavorHerbalife · off the market8 mg
• KingCutler Nutritionin a blend
• King Mass XL Dark ChocolateRonnie Coleman Signature Seriesin a blend
• King Mass XL Strawberry MilkshakeRonnie Coleman Signature Seriesin a blend
• King Mass XL Vanilla Ice CreamRonnie Coleman Signature Seriesin a blend
• Klean B-ComplexKlean Athlete50 mg
• Klean Gummy Multivitamin Natural Raspberry-Lemonade FlavorKlean Athlete11 mg

Where next?

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