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

• Max Out Blueberry PomegranateiFN iForce Nutrition25 mg
• Max RelaxMaxi Health250 mg
• Max Strength Blueberry LemonadeINNOSUPPS10 mg
• Max Strength Sour Watermelon CandyINNOSUPPS10 mg
• MaX ThyroidXYMOGEN5 mg
• Max Vit-Acell Anti-Oxidant Berry BlastMM Sports Nutrition20 mg
• Max Vit-Acell Citrus BlastMM Sports Nutrition20 mg
• Max Vit-Acell Energy Citrus ChargeMM Sports Nutrition20 mg
• Max-BHoltraCeuticals50 mg
• Max-EnergyViMulti30 mg
• MaxHealthTaylor MD Formulations25 mg
• Maxi Baby CareCountry Life8 mg
• Maxi Baby Care Liquid Natural Raspberry FlavorCountry Life8 mg
• Maxi MultiHigher Nature80 mg
• Maxi OneBluebonnet20 mg
• Maxi One Iron-FreeBluebonnet20 mg
• Maxi Pre-NatalCountry Life · off the market20 mg
• Maxi PrenatalMaxi Health20 mg
• Maxi Prenatal CapsMaxi Health20 mg
• Maxi Teen Supreme Her'sMaxi Health10 mg
• Maxi TwoBluebonnet100 mg
• Maxi Two Iron-FreeBluebonnet100 mg
• Maxi-HairCountry Life50 mg
• Maxi-Hair 50+Country Life18 mg
• Maxi-Hair for MenCountry Life40 mg
• Maxi-Hair PlusCountry Life50 mg
• Maxi-Hair Plus 5,000 mcg BiotinCountry Life50 mg
• MaxiFlowElevate Recovery Supplements · off the market10 mg
• Maximin PackNature Made120 mg
• MaximumBayer One A Day20 mg
• Maximum B-ComplexWonder Laboratories100 mg
• Maximum B-Complex B-100Wonder Laboratories100 mg
• Maximum CLAGNC Pro Performance20 mg
• Maximum FemaleNutritionWorks50 mg
• Maximum FoodInnate Response Formulas20 mg
• Maximum FormulaTop Care20 mg
• Maximum HairSupplement Spot33 mg
• Maximum Hardcore Xenadrine RippedXenadrine4 mg
• Maximum MaleNutritionWorks50 mg
• Maximum MaleCybergenics50 mg
• Maximum Nutrition BerryGNC Ultra Mega Green25 mg
• Maximum Nutrition Milk ChocolateGNC Women's Ultra Mega50 mg
• Maximum Nutrition Milk ChocolateGNC Mega Men50 mg
• Maximum Nutrition Vanilla BeanGNC Mega Men50 mg
• Maximum Nutrition Vanilla CremeGNC Women's Ultra Mega50 mg
• Maximum Once A DayQuest · off the market75 mg
• Maximum OneVitaCeutical Labs · off the market100 mg
• Maximum Potential For MenGood 'N Natural · off the market50 mg
• Maximum Soy-Spirulina Protein Powder Natural Chocolate FlavorVitaCeutical Labsin a blend
• Maximum Soy-Spirulina Protein Powder Natural Vanilla FlavorVitaCeutical Labsin a blend

Where next?

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