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

• NiacinamideGNC Mega Men100 mg
• NiacinamideThorne Research · off the market500 mg
• NiacinamideGNC Women's Ultra Mega100 mg
• NiacinamideDr. David Williams250 mg
• NiacinamidePure Encapsulations1,000 mg
• NiacinamideEarthborn Elements850 mg as transcribed, likely a slip
• NiacinamideThorne500 mg
• Niacinamide (Vitamin B3)BulkSupplements.com500 mg
• Niacinamide (Vitamin B3) 650 mgBulkSupplements.com650 mg
• Niacinamide 1,000 mgNature's Life1,000 mg
• Niacinamide 1,500 mgSource Naturals1,500 mg as transcribed, likely a slip
• Niacinamide 100GNC · off the market100 mg
• Niacinamide 100 mgRugby100 mg
• Niacinamide 1000 mgNatures Plus · off the market1,000 mg
• Niacinamide 1000 mgNOW1,000 mg
• Niacinamide 1000 mgNaturesPlus1,000 mg
• Niacinamide 1000 mgNusaPure1,000 mg
• Niacinamide 1500 mgVital Nutrients1,500 mg as transcribed, likely a slip
• Niacinamide 2000 mgSuperSmart2,000 mg as transcribed, likely a slip
• Niacinamide 250 mgSolgar · off the market250 mg
• Niacinamide 250 mgSwanson Premium Brand · off the market250 mg
• Niacinamide 250 mgJarrow Formulas · off the market250 mg
• Niacinamide 500Progressive Professional from Progressive Laboratories500 mg
• Niacinamide 500 mgVitamin World500 mg
• Niacinamide 500 mgCountry Life500 mg
• Niacinamide 500 mgThompson500 mg
• Niacinamide 500 mgSwanson Premium Brand · off the market500 mg
• Niacinamide 500 mgSwanson500 mg
• Niacinamide 500 mgThe Vitamin Shoppe500 mg
• Niacinamide 500 mgPureFormulas500 mg
• Niacinamide 500 mgDr. Clark Store500 mg
• Niacinamide 500 mgMajor500 mg
• Niacinamide 500 mgSuperSmart · off the market2,000 mg as transcribed, likely a slip
• Niacinamide 500 mgDr. Clark Research Association Dr. Clark Zentrum500 mg
• Niacinamide 500 mgNatures Plus · off the market500 mg
• Niacinamide 500 mgDouglas Laboratories500 mg
• Niacinamide 500 mgNutraBio · off the market500 mg
• Niacinamide 500 mgNOW500 mg
• Niacinamide 500 mgRugby500 mg
• Niacinamide 500 mgBronson500 mg
• Niacinamide 500 mgFoster Regal500 mg
• Niacinamide 500 mgDaVinci Laboratories of Vermont · off the market500 mg
• Niacinamide 500 mgDC500 mg
• Niacinamide 500 mgBest Naturals500 mg
• Niacinamide 500 mgLuckyVitamin500 mg
• Niacinamide 500 mgNaturesPlus500 mg
• Niacinamide 500 mgDaVinci Laboratories500 mg
• Niacinamide 500 mgNutricost500 mg
• Niacinamide 500 mgBluebonnet500 mg
• Niacinamide 500 mgWonder Laboratories500 mg

Where next?

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