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

• Nitro-Tech Crunchy Chocolate CrispMuscleTech10 mg
• Nitro-Tech Delicious Vanilla SwirlMuscleTech10 mg
• Nitro-Tech S'Mores SensationMuscleTech10 mg
• NitroPro Double Dutch Chocolate - FlavorHi-Tech Pharmaceuticals10 mg
• NitroPro Fresh Strawberry Milkshake - FlavorHi-Tech Pharmaceuticals10 mg
• NitroPro Vanilla Milkshake - FlavorHi-Tech Pharmaceuticals10 mg
• NitroVarinNovex Biotech45 mg
• Niva-PlusNivagen Pharmaceuticals20 mg
• NMN PlusEsmond Natural320 mg
• No Flush Niacin (Inositol Hexanicotinate) 800 mgLife Extension · off the market640 mg
• No Flush Niacin 500 mgWindmill · off the market500 mg
• No Flush Niacin 500 mgBronson Laboratories · off the market500 mg
• No Flush Niacin 500 mgFoods Plus · off the market500 mg
• No Flush Niacin 500 mgThompson500 mg
• No Flush Niacin 500 mgGNC · off the market500 mg
• No Flush Niacin 500 mgNatural Factors500 mg
• No Flush Niacin 500 mgSolaray500 mg
• No Flush Niacin 500 mgBronson500 mg
• No Flush Niacin 500 mgWindmill Natural Vitamins500 mg
• No Flush Niacin 640 mgLife Extension640 mg
• No Iron Multi Vitamin & Mineral AntioxiantTrader Joe's · off the market20 mg
• No Iron Multivitamin with MineralsNature's Blend15 mg
• No-Flush NiacinVitaCeutical Labs400 mg
• No-Flush NiacinVitamer Laboratories400 mg
• No-Flush NiacinVillage Vitality · off the market400 mg
• No-Flush NiacinAllergy Research Group430 mg
• No-Flush NiacinNutriCology430 mg
• No-Flush NiacinWoodstock Vitamins400 mg
• No-Flush Niacin (Inositol Hexanicotinate) 500 mgSolgar400 mg
• No-Flush Niacin 400 mgVitabase400 mg
• No-Flush Niacin 400 mgCHK Nutrition400 mg
• No-Flush Niacin 400/100Meijer Naturals400 mg
• No-Flush Niacin 500 mgThe Vitamin Shoppe500 mg
• No-Flush Niacin 500 mgFoster Regal400 mg
• No-Flush Niacin 500 mgSolgar · off the market400 mg
• No-Flush Niacin 500 mgDC400 mg
• No-Flush Niacin 500 mgSource Naturals500 mg
• No-Flush Niacin 500 mgWonder Laboratories400 mg
• No-Flush Niacin 525 mg Inositol HexanicotinateNatural Nutra400 mg
• No. 12 Nutri Hair ComplexWachters' · off the market20 mg
• No. 200 Futura 200Wachters' · off the market200 mg
• No. 21 Vanilla Shake Less 'N LeanWachters' · off the market10 mg
• No. 34 Children's ChewysWachters' · off the market10 mg
• No. 38 High Potency Multi-Vitamin With Minerals And IronWachters' · off the market55 mg
• No. 38 Iron Free High Potency Multi-Vitamin With MineralsWachters' · off the market55 mg
• No. 40 Multi-Vitamin Plus MineralsWachters' · off the market20 mg
• No. 48 Lady NouvelleWachters' · off the market55 mg
• No. 50 Vita-ManWachters' · off the market55 mg
• NO2 Red ExtremeMRI45 mg
• Non Flush NiacinHighland Laboratories500 mg

Where next?

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