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

• Wholly ImmuneAllergy Research Group25 mg
• Wild Thing Tropical TornadoAssault Labs40 mg
• Wild-Caught Marine Collagen Peptides UnflavoredCodeage18 mg
• WireD4 Blue RazImage Sports30 mg
• WireD4 Fruit PunchImage Sports30 mg
• Wise WomanHigher Nature18 mg
• Withdrawal SupportCrystal Star30 mg
• Wolf's ManeVigor Labs30 mg
• Woman's Multivitamin Post Pregnancy Herbal Supplement for LactationPrescribed Choice · off the market17 mg
• Woman's Nutra PacksNature's Plus · off the market100 mg
• Woman's Prenatal 1Bayer One A Day18 mg
• WomenNature's Plus Source of Life · off the market50 mg
• WomenGarden of Life MyKind Organics16 mg
• WomenHighT4 mg
• WomenGarden of Life Vitamin Code16 mg
• Women 50+ MultivitaminSimply Right · off the market14 mg
• Women 50+ MultivitaminMember's Mark14 mg
• Women 50+ Multivitamin TabletsMember's Mark14 mg
• Women 55+Garden of Life MyKind Organics16 mg
• Women Multivitamin + Supporting HerbsSuper Nutrition SimplyOne40 mg
• Women Multivitamin + Supporting Herbs Iron FreeSuper Nutrition SimplyOne · off the market40 mg
• Women Over 40MegaFood20 mg
• Women Over 40Innate Response Formulas20 mg
• Women Over 40 One DailyMegaFood20 mg
• Women Over 40 One DailyInnate Response Formulas20 mg
• Women Over 50Nature's Code · off the market20 mg
• Women Over 55MegaFood · off the market20 mg
• Women Over 55 One DailyMegaFood16 mg
• Women'sGNC Ultra Mega Green · off the market25 mg
• Women'sBayer One A Day10 mg
• Women'sMegaFood20 mg
• Women'svitafusion8 mg
• Women's 2O Mixed Berry FlavorBayer One A Day10 mg
• Women's 30 Plus MultiHighland Laboratories40 mg
• Women's 40+ Advanced MultivitaminNew Chapter16 mg
• Women's 40+ Advanced MultivitaminMegaFood20 mg
• Women's 40+ Multi GoldNutriGold · off the market8 mg
• Women's 40+ MultivitaminInnate Response Formulas20 mg
• Women's 40+ Once Daily MultiAncient Nutrition5.3 mg
• Women's 40+ One Daily MultivitaminMegaFood20 mg
• Women's 45+ MultiVitaCeutical Labs20 mg
• Women's 45+ MultiVitamer Laboratories20 mg
• Women's 50 Plus MultiHighland Laboratories40 mg
• Women's 50+Nature's Bounty10 mg
• Women's 50+Mt. Angel Vitamins50 mg
• Women's 50+21st Century Wellify!20 mg
• Women's 50+ Advancedup&up20 mg
• Women's 50+ AdvantageBayer One A Day20 mg
• Women's 50+ CompleteBronson ONE20 mg
• Women's 50+ Complete MultivitaminBayer One A Day20 mg

Where next?

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