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

• C4 50x Icy Blue RazzCellucor45 mg
• C4 50X Pre-Workout Icy Blue RazzCellucor45 mg
• C4 50x WatermelonCellucor45 mg
• C4 Berry BombCellucor30 mg
• C4 Energy Zero Sugar Fruit PunchNutrabolt30 mg
• C4 Energy Zero Sugar WatermelonCellucor30 mg
• C4 Energy-Pack Icy Blue RazzCellucor30 mg
• C4 Extreme Energy Cherry LimeadeCellucor60 mg
• C4 Extreme Energy Icy Blue RazzCellucor60 mg
• C4 Extreme Energy Lemon DropCellucor60 mg
• C4 Extreme Energy Strawberry KiwiCellucor · off the market60 mg
• C4 Extreme Green AppleCellucor30 mg
• C4 Extreme Mystery FlavorCellucor30 mg
• C4 Extreme PineappleCellucor30 mg
• C4 Extreme Strawberry MargaritaCellucor30 mg
• C4 Extreme WatermelonCellucor30 mg
• C4 Fruit PunchCellucor30 mg
• C4 Green AppleCellucor30 mg
• C4 Icy Blue RazzCellucor30 mg
• C4 Mass Fruit PunchCellucor30 mg
• C4 Mass Icy Blue RazzCellucor30 mg
• C4 Mass Pink LemonadeCellucor30 mg
• C4 Mass With Creacarb Fruit PunchCellucor30 mg
• C4 Mass With Creacarb Icy Blue RazzCellucor30 mg
• C4 Neuro Icy Blue RazzCellucor30 mg
• C4 Neuro WatermelonCellucor30 mg
• C4 On The Go Berry BlastCellucor65 mg
• C4 On The Go Cherry LimeadeCellucor65 mg
• C4 On The Go Fruit PunchCellucor65 mg
• C4 On The Go Icy Blue RazzCellucor65 mg
• C4 On The Go Orange BurstCellucor65 mg
• C4 On The Go Pink LemonadeCellucor65 mg
• C4 On The Go WatermelonCellucor65 mg
• C4 Orange DreamsicleCellucor30 mg
• C4 Original Cherry LimeadeCellucor30 mg
• C4 Original Frozen BombsicleCellucor30 mg
• C4 Original Frozen BomsicleCellucor30 mg
• C4 Original Fruit PunchCellucor30 mg
• C4 Original Green AppleCellucor30 mg
• C4 Original Juicy Candy BurstCellucor30 mg
• C4 Original On The Go Cotton CandyNutrabolt30 mg
• C4 Original On The Go Fruit PunchCellucor30 mg
• C4 Original On The Go Icy Blue RazzCellucor30 mg
• C4 Original On The Go Orange BurstCellucor30 mg
• C4 Original On The Go Orange SliceNutrabolt30 mg
• C4 Original On The Go Sparkling Frozen BombsicleNutrabolt30 mg
• C4 Original On The Go Sparkling Strawberry Watermelon IceNutrabolt30 mg
• C4 Original On The Go Sparkling Twisted LemonadeCellucor30 mg
• C4 Original On The Go Sparkling Twisted LimeadeNutrabolt30 mg
• C4 Original On The Go Strawberry LemonadeCellucor30 mg

Where next?

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