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

• Green Tea Energy Mixed BerryNature's Answer20 mg
• Green Tea Triple Fat BurnerApplied Nutrition20 mg
• GreensGT Genesis Today0.7 mg
• Greens + Reds Mixed BerryMillecor13 mg
• Greens + Reds Natural OrangeSwolverineno amount
• GREENS Arnold PalmerCore Nutritionals16 mg
• GREENS Berry BlissCore Nutritionals16 mg
• GREENS Berry Bliss SampleCore Nutritionals16 mg
• GREENS Chocolate DecadenceCore Nutritionals16 mg
• GREENS Chocolate Decadence SampleCore Nutritionals16 mg
• Greens CompleteAkasha Naturals20 mg
• GREENS Grape CandyCore Nutritionals16 mg
• GREENS Vanilla BeanCore Nutritionals16 mg
• Grey Defence GeneJOLT!COORGA Nutraceuticals · off the marketin a blend
• GroloidGoliath Labs75 mg
• GroundedPacific BioLogic1,542 mg as transcribed, likely a slip
• Growth & ShineBioSchwartz15 mg
• Growth Vitamins Vanilla FlavoredThe Beard Club10 mg
• Grunt CandyCombat Nutra30 mg
• Gt ThymusSystemic Formulas Bio Function0.46 mg
• Gtc #2Bronson · off the market62.5 mg
• GTC FormulaBronson125 mg
• GTC Formula #2Bronson Laboratories · off the market62.5 mg
• GTF Chromium ComplexHigher Nature10 mg
• Guggul 250Wonder Laboratories125 mg
• GuggulXtraDC125 mg
• Gugu LipoPriority One Nutritional Supplements138 mg
• GugulplexIntegrative Therapeutics250 mg
• GugulPlexEnzymatic Therapy · off the market250 mg
• GugulPlusEnzymatic Therapy · off the market250 mg
• Gummi Yummi Sour Citrus21st Century20 mg
• Gummie Multi Vitamin Daily FormulaSpring Valleyin a blend
• GummiesNatures Plus Source of Life Animal Parade20 mg
• GummiesNaturesPlus Animal Parade20 mg
• Gummies Kids Multi with Iron Orange FlavorGarden of Life Vitamin Code1.6 mg
• Gummies Men's Multi Lemon Berry FlavorGarden of Life Vitamin Code1.6 mg
• Gummies Multi Vitamin With MineralsTreehouse1.5 mg
• Gummies Prenatal Multi with Iron 27 mg & Folate 600 mcg Cherry Lemonade FlavorGarden of Life Vitamin Code1.8 mg
• Gummy Bear EssentialsRainbow Light · off the market10 mg
• Gummy Mega Multi-Vitamin for Children Raspberry Naturally FlavoredVitables4 mg
• Gummy Multivitamin Mixed BerryGNC Women's Ultra Mega · off the market8 mg
• Gummy Power SoursRainbow Light · off the market10 mg
• Gummy Prenatal DXNatural Dynamix20 mg
• Gummy VitsMusclegen Performance Nutrition20 mg
• Gummy VitsGenepro Protein12 mg
• Gynovite PlusOptimox Corporation · off the market20 mg
• Gynovite PlusOptimox20 mg
• H HeartSystemic Formulas Bio Function7.5 mg
• H Hydro Recovery Coconut FlavorBiochem3.6 mg
• H-Proof Black CherryH-Proof10.8 mg

Where next?

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