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

• Optimal Prenatal ChewableSeeking Health25 mg
• Optimal Prenatal ChocolateSeeking Health25 mg
• Optimal Prenatal Methyl-FreeSeeking Health25 mg
• Optimal Prenatal VanillaSeeking Health25 mg
• Optimal SleepSeeking Health50 mg
• Optimal Sleep IISeeking Health15 mg
• Optimal Solutions Hair, Skin & NailsEsmond Natural25 mg
• Optimal StartSeeking Health100 mg
• Optimal Vitamin BLongevity Medical Clinic50 mg
• OptimenON Optimum Nutrition75 mg
• OptiMetaboliX 2:1 Vanilla DelightXYMOGEN40 mg
• OptiMetaboliX ChaiXYMOGEN40 mg
• OptiMetaboliX Chocolate MintXYMOGEN40 mg
• OptiMetaboliX Vanilla DelightXYMOGEN40 mg
• OptiMetaboliX Vanilla Delight No added Sugar, No SteviaXYMOGEN40 mg
• OptiminAbbott113.5 mg
• Optimized Collagen PeptidesYu6.1 mg
• Optimized NAD+ Cell Regenerator and ResveratrolLife Extension · off the market300 mg
• Optimized NAD+ Cell Regenerator with ResveratrolLife Extension250 mg
• Optimized Resveratrol With NAD + Cell RegeneratorLife Extension100 mg
• Optimized Resveratrol with Nicotinamide RibosideLife Extension100 mg
• Optimized Tryptophan PlusLife Extension66 mg
• Optimized TryptoPure PlusLife Extension66 mg
• Optimmuner PlusHypernaturals35 mg
• Optimum SilverVitamin Research Products50 mg
• Optimum Strength MultiVitaminLife Extension50 mg
• OptiMune Citrus FlavorIVL Institute For Vibrant Living10 mg
• Optismal No Tingle Blueberry GummyEkkovision20 mg
• Optisource Post Bariatric CitrusNestle HealthScience Optisource · off the market4 mg
• Optisource Post Bariatric Surgery Formula CitrusOptisource · off the market5 mg
• Optivite P.M.T.Optimox Corporation · off the market25 mg
• Optivite P.M.T.Optimox · off the market25 mg
• OralNaturally Clear10 mg
• Oral ChelateMicroTech Professional Formulations27 mg
• Orange Hydrapush Juicy WatermelonControlled Labs20 mg
• Orange Hydrapush Sour Green AppleControlled Labs20 mg
• Orange TriadControlled Labs30 mg
• Orange Triad + Greens Orange FlavorControlled Labs100 mg
• Organ ArmouredXcel Sports Nutrition · off the market400 mg as transcribed, likely a slip
• Organic All-In-One Decadent ChocolatePurely Inspired14.7 mg
• Organic All-In-One French VanillaPurely Inspired8.6 mg
• Organic Blue-Green SuperfoodTriquetra Health · off the market0.148 mg
• Organic Blue-Green SuperfoodTriquetra0.148 mg
• Organic ChlorellaSoTru · off the market2 mg
• Organic Chlorella 200 mgGreen Foods · off the market2.94 mg
• Organic Chlorella 500 mgGreen Foods3 mg
• Organic Chlorella PowderGreen Foods2.94 mg
• Organic Chlorella TabletsGreen Foods2.94 mg
• Organic Energy Lemon Green TeaEnerBee20 mg
• Organic Forti-FlaxBarlean's0.46 mg

Where next?

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