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

• Stress B-Complex with Zinc and Vitamin CGSL Technology10 mg
• Stress DefensePrescribed Choice · off the market450 mg
• Stress DefenseMDR Medical Doctors Research20 mg
• Stress EaseAN American Nutriceuticals20 mg
• Stress EndEnzymatic Therapy · off the market10 mg
• Stress EndNature's Way10 mg
• Stress EssentialIntegrative Therapeutics10 mg
• Stress FormulaWindmill100 mg
• Stress FormulaPuritan's Pride Premium · off the market100 mg
• Stress FormulaThe Vitamin Shoppe100 mg
• Stress FormulaMajor100 mg
• Stress FormulaPuritan's Pride100 mg
• Stress Formula With IronWindmill100 mg
• Stress Formula with IronMajor100 mg
• Stress Formula with IronBasic Vitamins100 mg
• Stress Formula With ZincWindmill100 mg
• Stress Formula with ZincMajor100 mg
• Stress Formula with ZincBasic Vitamins100 mg
• Stress GuardOregon's Wild Harvest0.9 mg
• Stress LessRise-N-Shine · off the market33 mg
• Stress Management SystemAltrum100 mg
• Stress PackNeoLife200 mg
• Stress PlusDC103 mg
• Stress Plus With Valerian RootNOW150 mg
• Stress Redux PlusVinco's · off the market15 mg
• Stress Redux PlusVinco15 mg
• Stress ReliefETST Earth Science Tech50 mg
• Stress ReliefVimerson Health28 mg
• Stress Relief PlusEB Earth's Bounty · off the market20 mg
• Stress Relief PlusEarth's Bounty20 mg
• Stress ResetMegaFood20 mg
• Stress ShieldCountry Life1.95 mg
• Stress SupportZoi Research100 mg
• Stress Support FormulaElevate Recovery Supplements · off the market10 mg
• Stress Support PackDouglas Laboratories120 mg
• Stress Vitamin B Complex With Vitamin CNature's Harmony100 mg
• Stress-B 100Highland Laboratories100 mg
• Stress-B-PlusDouglas Laboratories200 mg
• Stress-B-Plus (Vitamin B Complex)Douglas Laboratories · off the market200 mg
• Stress-Calm 160 PlusGreat Earth · off the market160 mg
• Stress-Free B W/CSource For Wellness · off the market50 mg
• Stress-PlexDouglas Laboratories100 mg
• Stress-PlexPriority One Nutritional Supplements100 mg
• Stress-Plex-ForteDouglas Laboratories200 mg
• Stress-XTrace Minerals Research18 mg
• Stress/PAN-FNutri-West15 mg
• StressArrestDesigns for Health100 mg
• StressAssistFuturebiotics100 mg
• Stressed OutVita Logic100 mg
• StresstabsInternational Vitamin Corporation50 mg

Where next?

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