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

• OrganIQ Eats VanillaGNC Earth Genius · off the market4 mg
• Organs BlendAncient Nutrition1 mg
• Original FormulaGreens Today · off the market17 mg
• Original Formula UnflavoredAll One100 mg
• Original Iron FreeCooper Complete · off the market20 mg
• Original Meal Replacement Extreme ChocolateMET-Rxin a blend
• Original Meal Replacement Original VanillaMET-Rxin a blend
• Original Prenatal FormulaBronson Laboratories15 mg
• Original Superfood Veggie CapsulesGreens+2.3 mg
• Original with IronCooper Complete · off the market20 mg
• Ortho B ComplexOrtho Molecular Products50 mg
• Ortho MultiProtocol For Life Balance50 mg
• Ortho Multi For MenProtocol For Life Balance35 mg
• Ortho Multi For WomenProtocol For Life Balance50 mg
• Ortho Multi GreensProtocol For Life Balance25 mg
• Ortho Multi Softgels for MenProtocol For Life Balance · off the market35 mg
• Ortho Multi Softgels for Men Iron FreeProtocol For Life Balance35 mg
• Ortho Multi Softgels for WomenProtocol For Life Balance25 mg
• Ortho Multi Super Fruits Acai FlavorProtocol For Life Balance25 mg
• Ortho Multi Women's 40+Protocol For Life Balance30 mg
• Orti BGenestra Brands120 mg
• OspMannatech8 mg
• Osteo-B IIBiotics Research Corporation20 mg
• Osteo-B PlusBiotics Research Corporation20 mg
• Osteo-Support FormulaDouglas Laboratories90 mg
• OsteoPrimeNature's Way50 mg
• Osteoprime ForteIntegrative Therapeutics50 mg
• OsteoPrime PlusNature's Way · off the market50 mg
• OsteoPrime Plus Calcium & MagnesiumNature's Way50 mg
• Osteoprime UltraIntegrative Therapeutics50 mg
• Outrage Blackberry LemonadeNutrex Research30 mg
• Outrage Blue RaspberryNutrex Research30 mg
• Outrage Fruit PunchNutrex Research60 mg
• Outrage WatermelonNutrex Research60 mg
• Over 30 Hormone SupportGleeFull Supplements1 mg
• Overkill Blood Orange KiwiRising Labs · off the market15 mg
• Overkill Necrosis Sour Black CherryRising Labs · off the market15 mg
• Overkill V2 Wolf BloodRising Labs · off the market15 mg
• OxMTN OPS20 mg
• Oxy Lean EliteGenOne Laboratoriesin a blend
• Oxydrene [Crenulin-RCC2] 255 mg EliteNovex Biotech30 mg
• OxyDrene NAD+ EnhancerNovex Biotech500 mg
• OxygenicsMetagenics5.6 mg
• Oxylent 5-In-1 Formula Sparkling Berries FlavorOxylent · off the market20 mg
• Oxylent 5-In-1 Formula Sparkling Blackberry Pomegranate FlavorOxylent · off the market20 mg
• Oxylent 5-in-1 Formula Sparkling Mandarin FlavorOxylent · off the market20 mg
• Oxylent 5-In-1 Multivitamin Supplement Drink Sparkling BerriesOxylent · off the market20 mg
• Oxylent 5-In-1 Multivitamin Supplement Drink Sparkling Blackberry PomegranateOxylent · off the market20 mg
• Oxylent 5-In-1 Multivitamin Supplement Drink Sparkling Blackberry Pomegranate FlavorOxylent · off the market20 mg
• Oxylent 5-in-1 Multivitamin Supplement Drink Sparkling MandarinOxylent · off the market20 mg

Where next?

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