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

• PRE-SF Blue RaspberryNutricost Performance75 mg
• PRE-SF Peach MangoNutricost Performance75 mg
• PRE-SF Pink LemonadeNutricost Performance75 mg
• Pre-Teen BoysMNP Michael's Naturopathic Programs · off the market20 mg
• Pre-Teen Boys Daily Multi VitaminMichael's Naturopathic Programs20 mg
• Pre-Teen Boys Daily Multi VitaminMNP Michael's Naturopathic Programs20 mg
• Pre-Teen Boys Multivitamin TabletsMH Michael's Health Naturopathic Programs20 mg
• Pre-Teen GirlsMNP Michael's Naturopathic Programs · off the market20 mg
• Pre-Teen Girls Daily Multi VitaminMichael's Naturopathic Programs · off the market20 mg
• Pre-Teen Girls Daily Multi VitaminMNP Michael's Naturopathic Programs · off the market20 mg
• Pre-Teen Girls Multivitamin TabletsMH Michael's Health Naturopathic Programs20 mg
• Pre-Training Formula Tropical PunchGamma Labs20 mg
• Pre-Vites Children's Chewable Delicious Natural Orange FlavorPuritan's Pride6.75 mg
• Pre-Workout Blue Raspberry IceeSparta Nutrition · off the market20 mg
• Pre-Workout Boost Blue Raspberry FlavoredXS23 mg
• Pre-Workout Boost Green AppleXS23 mg
• Pre-Workout Cherry IceeSparta Nutrition · off the market20 mg
• Pre-Workout Complex Blue RaspberryNutricost30 mg
• Pre-Workout Complex Blue RaspberryNutricost Women20 mg
• Pre-Workout Explosioin Fruit PunchSix Star Pro Nutrition30 mg
• Pre-Workout Explosion Fruit PunchSix Star Pro Nutrition30 mg
• Pre-Workout Explosion Icy Rocket FreezeSix Star Pro Nutrition30 mg
• Pre-Workout Explosion Pink LemonadeSix Star Pro Nutrition30 mg
• Pre-Workout Explosion Ripped Peach MangoSix Star30 mg
• Pre-Workout Explosion Ripped WatermelonSix Star Pro Nutrition30 mg
• Pre-Workout Explosion Ripped WatermelonSix Star30 mg
• Pre-Workout for Women Pina ColadaSheer Strength Labs5 mg
• Pre-Workout For Women StrawberryNutricost15 mg
• Pre-Workout Igniter Blue RaspberryMarked Nutrition · off the market6 mg
• Pre-Workout Igniter Fruit PunchMarked Nutrition · off the market6 mg
• Pre-Workout Nuclear X Citrus SurgeMET-Rx50 mg
• Pre-Workout Nuclear X Radioactive PunchMET-Rx100 mg
• Pre-Workout Nuclear X Sour AppleMET-Rx50 mg
• Pre-Workout Nuclear X WatermelonMET-Rx50 mg
• Pre-Workout Original Smarties FlavorSparta Nutrition · off the market20 mg
• Pre-Workout Primal PotionUC UltraChamp · off the market25 mg
• Pre/Post Natal VitaminsNutri-West7.5 mg
• PreferaOBAlaven Pharmaceutical · off the market17 mg
• PreferaOB OneAlaven Pharmaceutical · off the market17 mg
• PreferaOB TabletAlaven Pharmaceutical · off the market17 mg
• Prefuel Orange FlavorEnergyFirst15 mg
• Preg-Natal + DHAJarrow Formulas · off the market40 mg
• Preg-Natal TabletsJarrow Formulas · off the market10 mg
• Pregna ViteGenestra Brands36 mg
• PregnancyFemMed10 mg
• Pregnancy + GingerFemMed10 mg
• Pregnancy Care AdvancedMetagenics15 mg
• Pregnancy MultinutrientInessa20 mg
• Pregnancy PlanningBayer One A Day18 mg
• Pregnancy PlusHigher Nature90 mg

Where next?

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