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

• Night Pack: New MoodOnnit15 mg
• Nighttime RecoveryAdvoCare7 mg
• Ninja MojoNinja America · off the market20 mg
• NirvanaAmerican Muscle Sports Nutrition · off the market20 mg
• NITRABURST Black CherryGSI Giant Sports International25 mg
• NITRABURST Blue RaspberryGSI Giant Sports International25 mg
• NITRABURST Fruit PunchGSI Giant Sports International25 mg
• NITRABURST Guava MangoGSI Giant Sports International25 mg
• NITRABURST PineappleGSI Giant Sports International25 mg
• NITRABURST WatermelonGSI Giant Sports International25 mg
• Nitraflex Advanced Blue RaspberryGAT Sport25 mg
• Nitraflex Beach BlastGAT Sport25 mg
• Nitraflex Blackberry LemonadeGAT Sport25 mg
• Nitraflex Blood OrangeGAT Sport25 mg
• Nitraflex Blue RaspberryGAT Sport25 mg
• Nitraflex Burn Tropic ThunderburstGAT Sport25 mg
• Nitraflex Fruit PunchGAT Sport25 mg
• Nitraflex Green AppleGAT Sport25 mg
• Nitraflex Guava DragonfruitGAT Sport25 mg
• Nitraflex KAOS Stim-Free White Cherry LimeadeGAT Sport2.5 mg
• Nitraflex Lemon TeaGAT Sport25 mg
• Nitraflex Strawberry MangoGAT Sport25 mg
• Nitraflex Ultra Peach PineappleGAT Sport5 mg
• Nitric BoostInfoWars M.D30 mg
• Nitric OxideBuilt By Nature30 mg
• Nitric Oxide BoosterIron Brothers Supplements30 mg
• Nitric Oxide BoosterSNAP10 mg
• Nitric Oxide Organic BeetsSNAP16 mg
• Nitric Oxide Organic BeetsSNAP Supplements16 mg
• Nitric Oxide Organic Beets Apple FlavorSNAP16 mg
• Nitric Oxide Organic Beets Cherry Lime FlavorSNAP16 mg
• Nitric Oxide Plasma Water Cherry LimeGood State Plasmain a blend
• Nitric Oxide Plasma Water WatermelonGood State Plasmain a blend
• Nitric Oxide PreWorkoutSNAP Supplements25 mg
• Nitric Oxide PreWorkout Organic BeetsSNAP16 mg
• Nitric Oxide Synthesis Pumped Blue RaspberryMET-Rx · off the market20 mg
• Nitric Oxide Synthesis Pumped Fruit PunchMET-Rx · off the market20 mg
• Nitric Oxide Synthesis Pumped Nitro GrapeMET-Rx · off the market20 mg
• Nitric Oxide Synthesis Pumped Strawberry LemonadeMET-Rx · off the market20 mg
• Nitric Oxide Synthesis Pumped WatermelonMET-Rx · off the market20 mg
• Nitric Rush Fruit PunchNature's Best · off the market20 mg
• Nitric Shock Blue RaspberrySNI Hardcore Series · off the marketin a blend
• Nitric Shock Fruit PunchSNI Hardcore Series · off the marketin a blend
• Nitric Shock Fruit PunchiPro Organic Supplements · off the market20 mg
• Nitric Shock WatermelonSNI Hardcore Series · off the marketin a blend
• Nitrix 2.0BSN12 mg
• NitroKinobody25 mg
• Nitro WoodINNOSUPPS10 mg
• Nitro Wood MagnumINNOSUPPS10 mg
• Nitro-Tech Advanced Protein Bar Peanut Butter Chocolate ChipMuscleTech9 mg

Where next?

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