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

• PR Natal 430PruGen, Inc. Pharmaceuticals20 mg
• Pre & Post Natal DHA + Iron Fruit FlavoredNoor Vitamins20 mg
• PRE Blue RaspberryNutraBio30 mg
• Pre Blue SkySteel10 mg
• Pre Candy BlissSteel10 mg
• PRE Cherry LimeadeNutraBio · off the market30 mg
• PRE Dragonfruit CandyNutraBio · off the market30 mg
• PRE Extreme Dragonfruit CandyNutraBio30 mg
• PRE Extreme Grape Berry CrushNutraBio30 mg
• Pre Extreme Green AppleNutraBio30 mg
• PRE Extreme Raspberry LemonadeNutraBio30 mg
• Pre Extreme Stimulant Free WatermelonNutraBio30 mg
• Pre Extreme UnflavoredNutraBio30 mg
• Pre Extreme WatermelonNutraBio30 mg
• Pre Fight Lemon LimeInfinite Labs18 mg
• Pre Fight Tropical BlastInfinite Labs18 mg
• PRE Fruit PunchNutricost Women20 mg
• PRE GrapeNutricost Women20 mg
• PRE Grape Berry CrushNutraBio30 mg
• Pre Green AppleNutraBio30 mg
• PRE Guava LimeVital Performance4 mg
• PRE Lemon GrapeVital Performance4 mg
• PRE Passion FruitVital Performance4 mg
• PRE Peach MangoNutricost Women20 mg
• PRE Pre-Workout Complex Blue RaspberryNutricost Performance25 mg
• PRE Pre-Workout Complex Fruit PunchNutricost Performance25 mg
• PRE Pre-Workout Complex GrapeNutricost Performance25 mg
• PRE Pre-Workout Complex Peach MangoNutricost Performance25 mg
• PRE Pre-Workout Complex WatermelonNutricost Performance25 mg
• PRE Raspberry LemonadeNutraBio · off the market30 mg
• Pre Raw UnflavoredNutraBio30 mg
• Pre Rise Fruit PunchAmazing Muscle40 mg
• PRE Stim-Free Dragonfruit CandyNutraBio30 mg
• Pre Stim-Free Green AppleNutraBio30 mg
• PRE Stim-Free WatermelonNutraBio30 mg
• Pre Stimulant Free WatermelonNutraBio · off the market30 mg
• PRE StrawberryNutricost Women20 mg
• PRE Strawberry Lemon BombNutraBio · off the market30 mg
• Pre Tropical Fruit PunchNutraBio30 mg
• Pre Tropical PunchProMera Sports · off the market20 mg
• Pre UnflavoredNutraBio · off the market30 mg
• PRE V.2 Raw UnflavoredNutraBio30 mg
• Pre W.O. Cherry WatermelonDymatize · off the market30 mg
• Pre W.O. Chilled Fruit FusionDymatize · off the market30 mg
• Pre W.O. Handspun Cotton CandyDymatize · off the market30 mg
• Pre W.O. Pineapple Orange CrushDymatize · off the market30 mg
• Pre W.O. Sweet Cherry LimeDymatize · off the market30 mg
• PRE WatermelonNutricost Women20 mg
• Pre WatermelonNutricost Performance25 mg
• PRE WatermelonNutraBio30 mg

Where next?

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