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

• Reno CapsNnodum Pharmaceuticals20 mg
• RenuvetrolNutriPharm · off the market5 mg
• Replenish Women's MultivitaminCenegenics Naturals · off the market20 mg
• Rerform Matrix Island FruitHIT Supplements · off the market10 mg
• Resist-XMetagenics50 mg
• Resistance C Lemon Lime Flavored Drink MixResistance C20 mg
• Resistance C Raspberry Flavored Drink MixResistance C20 mg
• Resistance C Tangerine Flavored Drink MixResistance C20 mg
• Resistance Support FormulaDouglas Laboratories120 mg
• Respawn BombsicleGorilla Mind32 mg
• Respawn Cherry BlackoutGorilla Mind16 mg
• Respawn Jungle JuiceGorilla Mind16 mg
• ResplenishRoar Back Nutrition · off the market20 mg
• Rest Well Tasty Minty Flavour SprayHigher Nature3.2 mg
• RestorKatalyst Nutraceuticals16 mg
• RestoreTorii Labs · off the market3 mg
• RestoreHerbal Nutrition7 mg
• RestorXBioclinic Naturals6 mg
• Resurgence Pina ColadaBlackstone Labs · off the market20 mg
• ResveracelThorne Research · off the market300 mg
• ResveraCelThorne · off the market415 mg
• Resveratrol Anti-Aging Complex Liquid Delicious Mixed Berry FlavorNature's Plus AgeLoss · off the market6 mg
• Resveratrol MaxJustified Laboratories50 mg
• Rev Diet EnergyNeon Sport · off the market5 mg
• ReversirolJustified Laboratories2.5 mg
• Revisionnutra4health · off the market40 mg
• Revital XNatural Factors · off the market6 mg
• RevitalAge UltraPure Encapsulations50 mg
• Revitalizing Hair BlendHair La Vie5 mg
• RevitalXNatural Factors8 mg
• RevitalX Intestinal Rejuvenation Formulanatural Factors · off the market6 mg
• RevitalX Step 1Natural Factors8 mg
• ReviveFNX20 mg
• Revive Post-Workout Double Fudge ChocolateSheer Strength Labs8 mg
• RexaVarIncredible Health Decisions45 mg
• RezistafLifeLink5,000 mg as transcribed, likely a slip
• Ribo-ZipMedifood · off the market5 mg
• Rich ChocolateDymatize Nutrition · off the market15 mg
• Rich Mocha SlimStyles Weight Loss Drink Mix With PGXNatural Factors · off the market10 mg
• Rico Women's BalanceDr. Rico Perez20 mg
• Right 1 DailyCarlson40 mg
• Right StepPD-Rx Pharmaceuticals10 mg
• Ripped Force Fruit PunchA.B.B. American Body Building · off the market10 mg
• Ripped Force GrapeA.B.B. American Body Building · off the market10 mg
• Ripped Fuel 5XTwinlab10 mg
• Ripped Juice Fruit PunchBetancourt Nutrition · off the market15 mg
• Riptek V2 ThermogenicQNT90 mg
• RiteStart Kids & Teens4Life27 mg
• RiteStart KIds & Teens Apple & Orange Flavors4Life · off the market9 mg
• RivalmenRivalus75 mg

Where next?

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