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

• Source of Life PrenatalNaturesPlus40 mg
• Source of Life Prenatal Liquid Natural Tropical Fruit FlavorNature's Plus · off the market40 mg
• Source of Life RedNatures Plus · off the market40 mg
• Source of Life RedNaturesPlus40 mg
• Source Of Life Red Energy Shake Natural Exotic Red Fruit FlavorNature's Plus · off the market40 mg
• Source Of Life Red Lightning BarNature's Plus · off the marketin a blend
• Source of Life Red Liquid Natural Delicious Mixed Berry FlavorNatures Plus40 mg
• Source Of Life Red Mini TabsNatures Plus · off the market40 mg
• Source of Life TabletsNature's Plus Source of Life · off the market40 mg
• Source of Life TabletsNatures Plus · off the market40 mg
• Source Of Life With Whole Food Concentrates Mini-TabsNature's Plus · off the market40 mg
• Source of Life With Whole Food Concentrates No IronNatures Plus · off the market40 mg
• Source Of Life with Whole Food Concentrates TabletsNature's Plus · off the market40 mg
• Source of Life WomenNatures Plus · off the market50 mg
• Source of Life WomenNaturesPlus50 mg
• Source Of Life Women Liquid Natural Berry FlavorNatures Plus · off the market50 mg
• Source Of Life Women Liquid Natural Berry FlavorNaturesPlus50 mg
• Source of Life Women TabletsNatures Plus · off the market50 mg
• Source of Life Women TabletsNaturesPlus50 mg
• Source of Life Women with Calcium, Folate & LuteinNature's Plus · off the market50 mg
• Soy Protein FormulaGreens Today10 mg
• Soy Protein Isolate Powder Delicious VanillaRadiance4 mg
• SP250 Blue RaspberryGaspari Nutrition30 mg
• SP250 Fruit PunchGaspari Nutrition30 mg
• SP250 PineappleGaspari Nutrition30 mg
• SparkEu Natural10 mg
• Spark Energy Blue RaspberryAdvoCare60 mg
• Spark Energy CherryAdvoCare60 mg
• Spark Energy Cranberry Peach OrangeAdvoCare60 mg
• Spark Energy Drink Mix Raspberry TeaAdvocare60 mg
• Spark Energy Drink Mix TangerineAdvocare60 mg
• Spark Energy Drink Mix WatermelonAdvocare60 mg
• Spark Energy Fruit PunchAdvoCare60 mg
• Spark Energy GrapeAdvoCare60 mg
• Spark Energy Green AppleAdvoCare60 mg
• Spark Energy LimeadeAdvoCare60 mg
• Spark Energy Mandarin OrangeAdvoCare · off the market60 mg
• Spark Energy Mango StrawberryAdvoCare60 mg
• Spark Energy Pineapple CoconutAdvoCare · off the market60 mg
• Spark Energy Pink LemonadeAdvoCare60 mg
• Spark Energy Raspberry LemonadeAdvocare60 mg
• Spark Energy StrawberryAdvoCare60 mg
• Spark Energy Sunrise GrapefruitAdvoCare · off the market60 mg
• Spark Energy WatermelonAdvoCare60 mg
• Spark Mandarin OrangeAdvoCare60 mg
• Spark Passion FruitAdvoCare60 mg
• Spark Pineapple CoconutAdvoCare60 mg
• Spark Sunrise GrapefruitAdvoCare60 mg
• Sparkling ColaCelsius20 mg
• Sparkling Cucumber LimeCelsius20 mg

Where next?

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