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

• Prenatal Plus1st Phorm4 mg
• Prenatal PlusMama's Select18 mg
• Prenatal PlusRon Teeguarden Nutraceuticals25 mg
• Prenatal Plus 1 mg Folic AcidQuest · off the market7 mg
• Prenatal Plus DHAPink Stork18 mg
• PreNatal Plus DHA CompleteBuried Treasure Liquid Nutrients · off the market25 mg
• PreNatal Plus DHA Daily MultiBuried Treasure Liquid Nutrients25 mg
• Prenatal Plus IronBlenheim Pharmacal · off the market20 mg
• Prenatal Plus Iron TabletsMajor Pharmaceuticals20 mg
• PreNatal Plus Iron TabletsNationwide Laboratories · off the market20 mg
• Prenatal Plus MultivitaminPNV Prenatal Health20 mg
• Prenatal Plus Multivitamin TabletsPNV Prenatal Health20 mg
• Prenatal Plus Vitamin & Mineral TabletNexgen Pharma20 mg
• Prenatal Plus Vitamin And Mineral TabletAmneal Pharmaceuticals20 mg
• Prenatal Plus Vitamin and Mineral TabletBlenheim Pharmacal · off the market20 mg
• Prenatal Plus Vitamin and Mineral TabletAvKARE20 mg
• Prenatal Plus VitaminsPatrin Pharma20 mg
• Prenatal Precious Gems Delicious Orange Zest FlavorRainbow Light · off the market20 mg
• Prenatal ProDesigns for Health30 mg
• Prenatal SAPNFH50 mg
• Prenatal SupportWindmill10 mg
• Prenatal Support Prenatal VitaminsKroger20 mg
• Prenatal SupremeAdaptogen Research30 mg
• Prenatal TabletEsmond Natural22 mg
• Prenatal TabletsLongs Wellness · off the market20 mg
• Prenatal TabletsMajor18 mg
• Prenatal Triple Power MultivitaminsSuper Nutrition SimplyOne · off the market40 mg
• Prenatal Ultra Blend PremiumNatural Goal · off the market13 mg
• Prenatal Vita AntioxidantUSANA CellSentials · off the market20 mg
• Prenatal Vita AntioxidantUSANA20 mg
• Prenatal Vitamin & Mineral FormulaSundown Naturals20 mg
• Prenatal Vitamin & Mineral FormulaNatural Wealth20 mg
• Prenatal Vitamin GummyDr. Tobias18 mg
• Prenatal Vitamin TabletsMajor Pharmaceuticals18 mg
• Prenatal VitaminsSafeway Care · off the market20 mg
• Prenatal VitaminsFinest Nutrition20 mg
• Prenatal VitaminsHealthy Accents20 mg
• Prenatal VitaminsDG Health20 mg
• Prenatal VitaminsSmart Sense20 mg
• Prenatal VitaminsDrFormulas20 mg
• Prenatal VitaminsSignature Care20 mg
• Prenatal VitaminsRugby20 mg
• Prenatal VitaminsCVS Health18 mg
• Prenatal VitaminsCentral Texas Community Health Centers20 mg
• Prenatal VitaminsBasic Vitamins18 mg
• Prenatal VitaminsSunmark20 mg
• Prenatal VitaminsPuritan's Pride20 mg
• Prenatal Vitaminsup&up20 mg
• PreNatal Vitamins PlusBoca Pharmacal20 mg
• Prenatal Vitamins PlusNnodum Pharmaceuticals20 mg

Where next?

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