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

• Prenatal Gummy Raspberry LemonadeGNC Women's18 mg
• Prenatal Gummy Vitamins With DHA & Folic AcidCVS Pharmacy20 mg
• Prenatal Liquid Natural Tropical Fruit FlavorNatures Plus Source of Life · off the market40 mg
• Prenatal MiniLife Nutrition18 mg
• Prenatal MultiVitaCeutical Labs20 mg
• Prenatal Multi365 Everyday Value20 mg
• Prenatal MultiWindmill · off the market20 mg
• Prenatal MultiVitamer Laboratories20 mg
• Prenatal MultiNatrol Gummies · off the market18 mg
• Prenatal MultiSmartyPants18 mg
• Prenatal MultiNature Made18 mg
• Prenatal MultiGarden of Life MyKind Organics20.7 mg
• Prenatal MultiNatures Plus Source of Life Garden22 mg
• Prenatal MultiWindmill Natural Vitamins20 mg
• Prenatal MultiAncient Nutrition12 mg
• Prenatal Multi + DHAWell At Walgreens18 mg
• Prenatal Multi + DHAGarden of Life Dr. Formulated9 mg
• Prenatal Multi + DHAMama's Select18 mg
• Prenatal Multi + DHANature Made18 mg
• Prenatal Multi + DHA 200 mgNature Made18 mg
• Prenatal Multi + DHA 200mgNature Made18 mg
• Prenatal Multi +DHANature Made18 mg
• Prenatal Multi GoldNutriGold · off the market18 mg
• Prenatal Multi Healthy MomNature's Bounty20 mg
• Prenatal Multi Once Daily CapsVitamer Laboratories20 mg
• Prenatal Multi Organic BerryGarden of Life MyKind Organics8 mg
• Prenatal Multi Tabletsup&up · off the market20 mg
• Prenatal Multi Vitamin & MineralNature's Way · off the market15 mg
• Prenatal Multi Vitamin SupplementBuild Nutrition · off the market20 mg
• Prenatal Multi With 1000 mg CalciumAnabolic Laboratories · off the market20 mg
• Prenatal Multi with DHABIOVEA20 mg
• Prenatal Multi With Omega-3Rexall Naturalist20 mg
• Prenatal Multi With Omega-3Sundown Naturalist20 mg
• Prenatal Multi+DHANutri-Rich20 mg
• PreNatal Multi-NutrientsVital Nutrients25 mg
• Prenatal Multi-VitaminWindmill20 mg
• Prenatal Multi-Vitamin And Multi-MineralNature's Way · off the market15 mg
• Prenatal MultipleProgressive Professional from Progressive Laboratories30 mg
• Prenatal Multiple with DHA & Vitamin D3Carlson · off the market80 mg
• PreNatal Multiple With DHA From Fish OilCarlson · off the market80 mg
• Prenatal MultivitaminAmerifit20 mg
• Prenatal MultivitaminSundown Naturals20 mg
• Prenatal MultivitaminWell At Walgreens20 mg
• Prenatal Multivitaminup&up20 mg
• Prenatal MultivitaminNutricost10 mg
• Prenatal MultivitaminWindmill · off the market20 mg
• Prenatal MultivitaminNATURELO Premium Supplements18 mg
• Prenatal MultivitaminRainbow Light · off the market30 mg
• Prenatal MultivitaminNature's Blend20 mg
• Prenatal MultivitaminLuckyVitamin13 mg

Where next?

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