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

• Organic Freeze-Dried Beet Juice PowderGroovy Bee0.1 mg as transcribed, likely a slip
• Organic GreensBluebonnet Super Earth0.3 mg
• Organic GreensAntler Farms0.6 mg
• Organic GreensPurely Inspired · off the market5 mg
• Organic Juce Garden BerryTerra Kai10 mg
• Organic Men's MultiLuckyVitamin18.4 mg
• Organic Men's MultiPuritan's Pride4.8 mg
• Organic Men's Multi Fresh Strawberry Flavorvitafusion16 mg
• Organic Men's Multivitamin Liposomal Vanilla PeachMary Ruth's · off the market10 mg
• Organic Men's Multivitamin Liposomal Vanilla Peach FlavoredMary Ruth's10 mg
• Organic Multi VitaminWindmill Natural Vitamins · off the market25 mg
• Organic MultivitaminSpring Valley10.5 mg
• Organic MultivitaminKirkland Signature7.9 mg
• Organic Multivitamin DropsWellements0.71 mg
• Organic Noni 100% Island StyleTahiti Trader0.127 mg as transcribed, likely a slip
• Organic Plant Collagen BuilderGarden of Life MyKind Organics3 mg
• Organic Plant-Based Recovery Blackberry LemonadeGarden of Life Sport · off the market3.5 mg
• Organic Plant-Based Recovery Blackberry Lemonade FlavorGarden of Life Sport2.5 mg
• Organic Prenatal Multi Ripe Raspberryvitafusion · off the market9 mg
• Organic Prenatal Multi Ripe Raspberry Flavorvitafusion9 mg
• Organic Reds + Probiotics Delicious Mixed Berry FlavorHealthy Delights Naturals10 mg
• Organic Soy PowderSwanson Certified Organic · off the market0.4 mg
• Organic SpirulinaTriquetra Health0.45 mg
• Organic Spirulina PowderSmart Organics1 mg
• Organic Spirulina Tablet FormTriquetra Health0.297 mg
• Organic Super Greens + MultivitaminAncient Nutrition1.7 mg
• Organic Super Greens Gummies Strawberry Watermelon FlavorAncient Nutrition1.4 mg
• Organic Total NutritionGenesis Today22 mg
• Organic Ultra JuiceNatures Plus3 mg
• Organic Ultra Juice Green PowderNaturesPlus6 mg
• Organic Vegan Protein Naturally Flavored ChocolateBoomer Nutrition19.8 mg
• Organic Vegan Protein Naturally Flavored VanillaBoomer Nutrition19.8 mg
• Organic Wheat GrassAntler Farms0.26 mg
• Organic Wheat GrassNatural Elements4 mg as transcribed, likely a slip
• Organic Wheat GrassBluebonnet0.32 mg
• Organic WheatGrassBluebonnet Super Earth0.32 mg
• Organic WheatgrassAmazing India0.2 mg
• Organic Wheatgrass PowderHerbal Hills0.2 mg
• Organic Whole Food B ComplexAmazon Elements16 mg
• Organic Whole Food Men's MultiAmazon Elements18.4 mg
• Organic Whole Food PrenatalAmazon Elements20 mg
• Organic Whole Food Women's MultiAmazon Elements18.4 mg
• Organic Women's MultiLuckyVitamin18.4 mg
• Organic Women's MultiPuritan's Pride1.9 mg
• Organic Women's Multi Wild Cherry Flavorvitafusion16 mg
• Organic Women's Multivitamin Liposomal Vanilla PeachMary Ruth's7.9 mg
• OrganicGreensBluebonnet Super Earth0.3 mg
• OrganicGreensBluebonnet0.3 mg
• OrganIQ Eats Chocolate HazelnutGNC Earth Genius · off the market4 mg
• OrganIQ Eats Mixed BerryGNC Earth Genius · off the market4 mg

Where next?

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