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

• EMPowerplus Berry BlendTruehope22.5 mg
• EMPowerplus Mint ChocolateTruehope22.5 mg
• EMPowerplus Q96Q Sciences24 mg
• EmpowHERLean Factor30 mg
• eMultiEvolved Natural Solutions · off the market95 mg
• End Fatigue Daily Energy B ComplexIntegrative Therapeutics50 mg
• End Fatigue Daily Energy Enfusion BerryIntegrative Therapeutics50 mg
• End Fatigue Daily Energy Enfusion Berry-FlavoredIntegrative Therapeutics · off the market50 mg
• End Fatigue Daily Energy Enfusion CitrusIntegrative Therapeutics50 mg
• End Fatigue Daily Energy Enfusion Citrus-Flavored Drink MixIntegrative Therapeutics · off the market50 mg
• Endless Energy Lemon ZingerOLLY2 mg
• Endocrine CompleteDouglas Laboratories30 mg
• Endorush Grape FixBSN12 mg
• Endorush Green Apple FixBSN12 mg
• Endothil Fruit PunchNovex Biotech24 mg
• Endothil Pink LemonadeNovex Biotech24 mg
• Endur-acinEndurance Products Company250 mg
• ENDUR-ACIN 250 mgEndurance Products Company250 mg
• ENDUR-ACIN 500 mgEndurance Products Company500 mg
• ENDUR-ACIN 750 mgEndurance Products Company750 mg
• Endur-Acin Extended Release Niacin 750 mgEP · off the market750 mg
• Endur-amideEndurance Products Company500 mg
• Endur-Amide 500 mgEndurance Products Company500 mg
• Endur-Amide Sustained Release Niacinamide 250 mgEP250 mg
• Endur-Amide Sustained Release NIacinamide 500 mgEP500 mg
• Endur-B ComplexEndurance Products Company200 mg
• Endur-ThineEndurance Products Company500 mg
• Endur-VM Multi-Vitamin & MineralEndurance Products Company30 mg
• Endura Lemon-Lime FlavorMetagenics10 mg
• Endura Lemonade FlavorMetagenics10 mg
• Endura Orange FlavorMetagenics10 mg
• EnduranceRyno Power8 mg
• Endurlyte Natural Orange FlavorGenestra Brands1.67 mg
• Enduro Pink LemonadeMTN OPS20 mg
• Ener-C CranberryPauling Labs5 mg
• Ener-C Lemon LimePauling Labs5 mg
• Ener-C OrangePauling Labs5 mg
• Ener-C Pinepple CoconutPauling Labs5 mg
• Ener-C RaspberryPauling Labs5 mg
• Ener-C Tangerine GrapefruitPauling Labs5 mg
• Energetic Mens Formula Multi Vitamin PlusMeijer Naturals50 mg
• Energetic Womens MultiMeijer Naturals50 mg
• EnergevitySource Naturals100 mg
• EnergexNewtonEverett25 mg
• Energie For HerOL Olympian Labs The Optimal Blend35 mg
• EnergiseHigher Nature25 mg
• Energize & Burn Fruit PunchGNC Total Lean Advanced20 mg
• Energize & Burn Fruit PunchGNC Total Lean20 mg
• Energize & Burn UnflavoredGNC Total Lean Advanced20 mg
• Energize Plus Pure PackPure Encapsulations37.5 mg

Where next?

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