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

• Niacin 100 mgLongs Wellness · off the market100 mg
• Niacin 100 mgVitamer Laboratories100 mg
• Niacin 100 mgExchange Select X100 mg
• Niacin 100 mgPureFormulas · off the market100 mg
• Niacin 100 mgDouglas Laboratories100 mg
• Niacin 100 mgVitaCeutical Labs100 mg
• Niacin 100 mgNature's Way100 mg
• Niacin 100 mgNatures Plus · off the market100 mg
• Niacin 100 mgSolgar · off the market100 mg
• Niacin 100 mgSwanson Premium Brand · off the market100 mg
• Niacin 100 mgCarlson100 mg
• Niacin 100 mgVillage Vitality · off the market100 mg
• Niacin 100 mgRugby100 mg
• Niacin 100 mgStandard Vitamins · off the market100 mg
• Niacin 100 mgNatural Factors100 mg
• Niacin 100 mgNatural Nutra100 mg
• Niacin 100 mgBasic Vitamins100 mg
• Niacin 100 mg21st Century100 mg
• Niacin 100 mgVitalBulk100 mg
• Niacin 100 mgAvPAK100 mg
• Niacin 100 mgNature's Blend100 mg
• Niacin 100 mgSource Naturals100 mg
• Niacin 100 mgNaturesPlus100 mg
• Niacin 100 mgSolaray100 mg
• Niacin 100 mgBluebonnet100 mg
• Niacin 100 mg CapsuleVitalBulk · off the market100 mg
• Niacin 100 mg Nicotinc AcidNature's Way · off the market100 mg
• Niacin 100 mg Nicotinic AcidDouglas Laboratories100 mg
• Niacin 100 mg TabletVitalBulk · off the market100 mg
• Niacin 100 mg Vitamin B-3Martin Avenue Pharmacy100 mg
• Niacin 1000 mgVitalBulk1,000 mg
• Niacin 25 mgDr. Clark Research Association Dr. Clark Zentrum25 mg
• Niacin 25 mgNatural Grocers by Vitamin Cottage25 mg
• Niacin 250Patient One 1 MediNutritionals250 mg
• Niacin 250 mgVitamin World250 mg
• Niacin 250 mgSundown Naturals · off the market250 mg
• Niacin 250 mgExchange Select X · off the market250 mg
• Niacin 250 mgFinest Nutrition250 mg
• Niacin 250 mgSolgar · off the market250 mg
• Niacin 250 mgThe Vitamin Shoppe250 mg
• Niacin 250 mgMajor250 mg
• Niacin 250 mgGNC250 mg
• Niacin 250 mg21st Century250 mg
• Niacin 250 mgTime Cap Labs250 mg
• Niacin 250 mgPure Naturals250 mg
• Niacin 250 mg Sustained ReleaseBronson250 mg
• Niacin 250 mg Sustained ReleaseBronson Laboratories250 mg
• Niacin 250 mg Time ReleaseSundown Naturals250 mg
• Niacin 250 mg Timed ReleasePuritan's Pride250 mg
• Niacin 250 mg Timed-ReleasedSolaray250 mg

Where next?

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