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

• N.O BlastNutriSuppz30 mg
• N.o.Natures Craft30 mg
• N.O. ExpressPure Advantage30 mg
• N.O. MonsterGoliath Labs · off the market50 mg
• N.O. MonsterColossal Labs50 mg
• N.O.-Xplode Blue RazBSN20 mg
• N.O.-Xplode Cherry LimeadeBSN20 mg
• N.O.-Xplode Fruit PunchBSN20 mg
• N.O.-XPLODE GrapeBSN20 mg
• N.O.-Xplode Green AppleBSN20 mg
• N.O.-Xplode Igniter Shot Blue RazBSN24 mg
• N.O.-Xplode Igniter Shot Green AppleBSN24 mg
• N.O.-Xplode Raspberry LemonadeBSN20 mg
• N.O.-XPLODE WatermelonBSN20 mg
• N.O.-Xplode XE Edge Blue RaspberryBSN30 mg
• N.O.-Xplode XE Edge Cherry LimeBSN30 mg
• N.O.-Xplode XE Edge Fruit PunchBSN30 mg
• N.O.-Xplode XE Edge Green AppleBSN30 mg
• N.O.-Xplode XE Edge Tropical BurstBSN30 mg
• N.O.370 Pre-Workout Formula Fruit PunchTop Secret40 mg
• N.O.S. Nitric Oxide Synthesis Pumped Blue RaspberryMET-Rx20 mg
• N.O.S. Nitric Oxide Synthesis Pumped Fruit PunchMET-Rx20 mg
• N.O.S. Nitric Oxide Synthesis Pumped Nitro-GrapeMET-Rx20 mg
• N.O.S. Nitric Oxide Synthesis Pumped Strawberry LemonadeMET-Rx20 mg
• N.O.S. Nitric Oxide Synthesis Pumped WatermelonMET-Rx20 mg
• N3 RelaxaSystemic Formulas Bio Function9 mg
• Nad(3)High Performance Nutrition0.84 mg
• NAD(3) Fountain of YouthHigh Performance Nutrition0.81 mg
• Nad+Crystal Star100 mg
• Nad+Rainbow Nutrients1,500 mg as transcribed, likely a slip
• NAD+ ActivateDaVinci Laboratories67.5 mg
• NAD+ Cell RegeneratorLife Extension300 mg
• NAD+ Cell Regenerator 100 mgLife Extension100 mg
• NAD+ Cell Regenerator and ResveratrolLife Extension · off the market300 mg
• NAD+ Cell Regenerator and Resveratrol EliteLife Extension300 mg
• Nail, Hair & Skin ConnectionRainbow Light · off the market10 mg
• Naked EnergyNaked Nutrition40 mg
• NanoLean Natural BerryBioPharma Scientific5 mg
• naNOX9 Next GenMuscleTech Performance Series30 mg
• NataChewEckson Labs20 mg
• Natal-V RX TabletsRochester Pharmaceuticals20 mg
• Nattokinase Heart Health FormulaGNC Preventive Nutrition20 mg
• NaturalAB Combination · off the market17 mg
• Natural 2015Combine2 · off the market10 mg
• Natural AcceleratorIsagenix12 mg
• Natural B Complex with C21st Century · off the market50 mg
• Natural BCAA + EAA Mango TwistINNOSUPPS16 mg
• Natural BCAA Candy AppleINNOSUPPS16 mg
• Natural Berry Flavor Bengal BitesVSN Vital Strength Nutrition · off the market20 mg
• Natural Berry Flavor Bengal BitesVitamer Laboratories20 mg

Where next?

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