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

• Multi Vitamin & Mineral AntioxidantTrader Joe's20 mg
• Multi Vitamin & Mineral Natural Orange/Mango FlavorChildLife Essentials30 mg
• Multi Vitamin + Mineral Formula Yummy Grape FlavorYum-V's12 mg
• Multi Vitamin 2000MaritzMayer Laboratories · off the market20 mg
• Multi Vitamin 2400MaritzMayer Laboratories · off the market20 mg
• Multi Vitamin and Fluoride Supplemental Drops 0.25 mgMayne Pharma8 mg
• Multi Vitamin and MineralDouglas Laboratories190 mg
• Multi Vitamin and Mineral without IronSwanson40 mg
• Multi Vitamin BeautyAdvanced Nutrition by Zahler8 mg
• Multi Vitamin BrainfoodAdvanced Nutrition by Zahler16 mg
• Multi Vitamin CalmAdvanced Nutrition by Zahler16 mg
• Multi Vitamin ComplexETST Earth Science Tech30 mg
• Multi Vitamin DigestionAdvanced Nutrition by Zahler16 mg
• Multi Vitamin EnergyAdvanced Nutrition by Zahler16 mg
• Multi Vitamin Energy Plus Advanced Women's FormulaFuturebiotics50 mg
• Multi Vitamin FormulaGood 'N Natural · off the market3 mg
• Multi Vitamin ImmuneAdvanced Nutrition by Zahler16 mg
• Multi Vitamin Made For WomenShredz200 mg
• Multi Vitamin MetabolismAdvanced Nutrition by Zahler16 mg
• Multi Vitamin One DailyAdvanced Nutrition by Zahler16 mg
• Multi Vitamin Passion Fruit & Mango FlavorSpray For Life20 mg
• Multi Vitamin SoftMelts Natural Orange FlavorChildLife Essentials8 mg
• Multi Vitamin SoftMelts Natural Organge FlavorChildLife Essentials · off the market8 mg
• Multi Vitamin With Black Cohosh & Soy IsoflavonesWindmill20 mg
• Multi Vitamin with D-3Basic Vitamins · off the market20 mg
• Multi Vitamin With Fluoride 0.25 mgLibertas Pharma13.5 mg
• Multi Vitamin With Fluoride 0.5 mgLibertas Pharma13.5 mg
• Multi Vitamin With Fluoride 1 mgLibertas Pharma13.5 mg
• Multi Vitamin with IronBasic Vitamins20 mg
• Multi Vitamin With MineralsRadiance Select75 mg
• Multi Vitamin With Minerals & Green TeaWindmill20 mg
• Multi Vitamin+ Apricot-MangoEmergen-Cin a blend
• Multi Vitamin+ Cherry-PomegranateEmergen-Cin a blend
• Multi Vitamin+ Cherry-Pomegranate Flavored Fizzy DrinkEmergen-C · off the market20 mg
• Multi Vitamin+ CitrusWellesse · off the market20 mg
• Multi Vitamin+ Citrus FlavoredWellesse · off the market20 mg
• Multi Vitamin+ Citrus FlavoredNature's Way20 mg
• Multi Vitamin, MineralEverlast Innergy · off the market95 mg
• Multi Vitamins & MineralsNutribiotic Essentials10 mg
• Multi Vitamins & Minerals Iron FreeVitamin World Green Source25 mg
• Multi Vitamins & Minerals With Lycopene 300 mcgBerkley & Jensen20 mg
• Multi Vitamins & Minerals With Whole Food ConcentratesVitamin World Green Source · off the market25 mg
• Multi ViteGenestra Brands10 mg
• Multi Vits & MineralsHigher Nature · off the market25 mg
• Multi VM 26Wonder Laboratories20,500 mg as transcribed, likely a slip
• Multi with Iron Century FormulaSwanson20 mg
• Multi with Omega-3Nature Made Kids First10 mg
• Multi without IronSwanson20 mg
• Multi without Iron High PotencySwanson60 mg
• Multi without MineralsSwanson20 mg

Where next?

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