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

• Glyco ResultsPhysician's Signature80 mg
• Glyco-Kinetic ComplexIntegrative Therapeutics266 mg
• GlycogenicsMetagenics200 mg
• GlycoLoad Blue RaspberryMetabolic Nutrition10 mg
• GlycoLoad Fruit PunchMetabolic Nutrition10 mg
• GlycoLoad GrapeMetabolic Nutrition30 mg
• GlycoLoad Green AppleMetabolic Nutrition30 mg
• GlycoLoad LemonadeMetabolic Nutrition10 mg
• GlycoLoad UnflavoredMetabolic Nutrition20 mg
• GlycoLoad WatermelonMetabolic Nutrition10 mg
• GlycoplexProgressive Professional from Progressive Laboratories500 mg
• GlycoSlim ChocolateMannatechin a blend
• GlycoSlim French VanillaMannatechin a blend
• Gnarly Performance Greens Blueberry AcaiGN Gnarly1.25 mg
• Gnarly Performance Greens Lemon MintGN Gnarly1.25 mg
• GNC Longevity Factors MultivitaminGNC Longevity Factors · off the market50 mg
• GoBPI30 mg
• Go Blue RaspEXT · off the market25 mg
• Go Blue RaspberryEXT · off the market30 mg
• Go Fruit PunchEXT25 mg
• Go Grape BubblegumEXT30 mg
• Go WatermelonEXT · off the market30 mg
• Go-Go EnergyKonsyl0.5 mg
• God Of PumpzAggressive Labz · off the market20 mg
• GoldNatures Plus Source of Life Animal Parade · off the market20 mg
• GoldNaturesPlus Source of Life Animal Parade · off the market20 mg
• Gold CapsulesNatures Plus Source of Life · off the market125 mg
• Gold Cobra 79000We Care Distributor · off the market30 mg
• GOLD Immune PlusSystemic Formulas Bio Challenge32 mg
• Gold Liquid Delicious Tropical Fruit FlavorNature's Plus Source of Life · off the market33 mg
• Gold Liquid Delicious Tropical Fruit FlavorNaturesPlus Source of Life33 mg
• Gold Liquid Natural Tropical Berry FlavorNatures Plus Source of Life Animal Parade · off the market20 mg
• Gold Liquid Natural Tropical Berry FlavorNaturesPlus Source of Life Animal Parade20 mg
• Gold Natural Cherry FlavorNatures Plus Source of Life Animal Parade · off the market20 mg
• Gold Natural Grape FlavorNatures Plus Source of Life Animal Parade · off the market20 mg
• Gold Natural Grape FlavorNaturesPlus Source of Life Animal Parade · off the market20 mg
• Gold Natural Orange FlavorNatures Plus Source of Life Animal Parade · off the market20 mg
• Gold Natural Orange FlavorNaturesPlus Source of Life Animal Parade · off the market20 mg
• Gold Natural Watermelon FlavorNature's Plus Source of Life Animal Parade · off the market20 mg
• Gold Natural Watermelon FlavorNaturesPlus Source of Life Animal Parade · off the market20 mg
• Gold Specifics Glucose ModulatorsSolgar · off the market10 mg
• Gold Standard Pre-Work Out Fruit PunchON Optimum Nutrition20 mg
• Gold Standard Pre-Work Out Green AppleON Optimum Nutrition20 mg
• Gold Standard Pre-Work Out WatermelonON Optimum Nutrition20 mg
• Gold Standard Pre-Workout Blueberry LemonadeON Optimum Nutrition20 mg
• Gold Standard Pre-Workout Blueberry LemonadeOptimum Nutrition20 mg
• Gold Standard Pre-Workout Fruit PunchOptimum Nutrition20 mg
• Gold Standard Pre-Workout Strawberry LimeON Optimum Nutrition20 mg
• Gold Standard Pro Gainer Double ChocolateON Optimum Nutrition4 mg
• Gold TabletsNature's Plus Source of Life · off the market125 mg

Where next?

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