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

• Niacin 500 mg Flush FreeNature's Truth · off the market400 mg
• Niacin 500 mg Flush Free FormulaGood Neighbor Pharmacy400 mg
• Niacin 500 mg Sustained ReleaseNOW · off the market500 mg
• Niacin 500 mg Sustained ReleaseBronson500 mg
• Niacin 500 mg Time ReleaseSundown Naturals · off the market500 mg
• Niacin 500 mg Time ReleasedSundown Naturals500 mg
• Niacin 500 mg Timed ReleaseSundown Naturals · off the market500 mg
• Niacin 500 mg Timed ReleaseWonder Laboratories · off the market500 mg
• Niacin 500 mg Timed ReleaseNature's Blend500 mg
• Niacin 500 mg Vitamin B-3NOW · off the market500 mg
• Niacin 500 Vitamin B3 500 mgDr. Clark Store500 mg
• Niacin B-6Nutri-West100 mg
• Niacin CR 750 mgDesigns for Health750 mg
• Niacin CRT 500 mgDesigns for Health500 mg
• Niacin Flush Freeup&up400 mg
• Niacin Flush Free 250 mgNatural Grocers by Vitamin Cottage250 mg
• Niacin Flush Free Inositol Hexanicotinate 500 mgup&up400 mg
• Niacin Hex - No Flush 525 mgAnabolic Laboratories · off the market400 mg
• Niacin Inositol Hexanicotinate 500 mgSimply Right · off the market400 mg
• Niacin Inositol Hexanicotinate 500 mgSundown Naturals400 mg
• Niacin Inositol Hexanicotinate 500 mg21st Century400 mg
• Niacin Inositol Hexanicotinate 500 mgNature's Bounty400 mg
• Niacin Inositol Hexanicotinate 500 mg Flush FreeNature's Bounty400 mg
• Niacin Inositol Hexanicotinate Capsules, 500 mgMember's Mark400 mg
• Niacin Long Acting Vitamin B-3 500 mgMartin Avenue Pharmacy500 mg
• Niacin Lozenge 50 mgSeeking Health50 mg
• Niacin No Flush 300 mgBIOVEA · off the market300 mg
• Niacin No-FlushAOR Advanced Orthomolecular Research Premium500 mg
• Niacin No-Flush 400 mgMartin Avenue Pharmacy400 mg
• Niacin PlusHighland Laboratories250 mg
• Niacin SEF 250 mgPhysician's Preference · off the market500 mg
• Niacin SRNuMedica500 mg
• Niacin Sustained Release 500 mgPL Progressive Laboratories500 mg
• Niacin T.R. 400 mgDouglas Laboratories400 mg
• Niacin Time Release 250 mgAN Amazing Nutrition Amazing Formulas250 mg
• Niacin Time Release 500 mgWonder Laboratories500 mg
• Niacin Time Release 500 mgWonder Labs500 mg
• Niacin Time-Release With NiaXtend 500 mgDoctor's Best · off the market500 mg
• Niacin TR Time Release 500 mgNatrol · off the market500 mg
• Niacin USPPureBulk.com500 mg
• Niacin Vitamin B-3, 100 mgVitabase100 mg
• Niacin Vitamin B3Allergy Research Group250 mg
• Niacin Vitamin B3 50 mgDr. Mercola50 mg
• Niacin Vitamin B3 Capsules 500 mgBulkSupplements.com500 mg
• Niacin-SR 500 mgKlaire Labs · off the market500 mg
• Niacin-TimeCarlson · off the market500 mg
• Niacin-Time 500 mgCarlson500 mg
• NiacinamideBronson · off the market500 mg
• NiacinamideDaVinci Laboratories Of Vermont500 mg
• NiacinamideCarlson500 mg

Where next?

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