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

• Healthy Blood Pressure FormulaGNC Preventive Nutrition10 mg
• Healthy Body PackCooper Complete · off the market20 mg
• Healthy CholesterolSupplement Spot50 mg
• Healthy Defense Citrus PomegranateFRS26 mg
• Healthy Defense Pomegranate BlueberryFRS26 mg
• Healthy Dip Cool Mint ChillTeaZa7 mg
• Healthy EnergyFRS20 mg
• Healthy Energy Citrus PomegranateFRS26 mg
• Healthy Energy Lemon LimeFRS26 mg
• Healthy Energy Low Cal OrangeFRS20 mg
• Healthy Energy OrangeFRS20 mg
• Healthy Energy Peach MangoFRS20 mg
• Healthy Energy Pineapple MangoFRS20 mg
• Healthy Energy Pomegranate BlueberryFRS20 mg
• Healthy Energy Raspberry + AcaiAspire11.2 mg
• Healthy Energy Wild BerryFRS26 mg
• Healthy Eyes Extra21st Century40 mg
• Healthy Feet & NervesTerry Naturally10 mg
• Healthy GlucosePriority One Nutritional Supplements100 mg
• Healthy HairNature's Bounty18 mg
• Healthy Hair Skin & Nails Plus Pomegranate 40:40ProCaps Laboratories5 mg
• Healthy Hair, Skin & NailsNature's Blend10 mg
• Healthy Hair, Skin & NailsTerra Origin5 mg
• Healthy Hair, Skin & NailsProCaps Laboratories3 mg
• Healthy Hair, Skin & NailsProCaps3 mg
• Healthy HeartNatures Nectar250 mg
• Healthy HeartNutraPro (Neutraceutical Corp.)12.5 mg
• Healthy JointsSupplement Spot1 mg
• Healthy JointsRise-N-Shine · off the market0.5 mg
• Healthy Kids MultivitaminMason Natural12 mg
• Healthy Ligaments & TendonsTerry Naturally200 mg
• Healthy Ligaments & TendonsEuroMedica200 mg
• Healthy Metabolism Soft Chew Pink LemonadeGNC Total Lean2 mg
• Healthy Mom Prenatal MultiNature's Bounty Optimal Solutions20 mg
• Healthy Protein Blackberry AcaiFRS26 mg
• Healthy Protein Orange CreamFRS26 mg
• Healthy SkinSupplement Spot40 mg
• Healthy Slim TropicalFRS26 mg
• Healthy TestosteroneGNC Men's25 mg
• Healthy Testosterone FormulaGNC Preventive Nutrition · off the market25 mg
• Healthy Transformation Advanced NutritionMetagenics25 mg
• Healthy Weight FormulaVitabase10 mg
• Hear Well1-800-WellMed · off the market40 mg
• HeartGNC Mega Men50 mg
• HeartGNC Women's Ultra Mega50 mg
• Heart & Vascular Health StrawberryHealthyCell32 mg
• Heart AntioxidantBluebonnet25 mg
• Heart DUO MicrosolveFitLine3.2 mg
• Heart EssentialsSwanson Condition Specific Formulas · off the market9 mg
• Heart Essentials Cholest WisePuritan's Pride600 mg

Where next?

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