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

• Power Nutrient Natural Cranberry Flavored Vitamins and Minerals BlendVitamins Direct20 mg
• Power OnPoweronoff5 mg
• Power Pak Acai BerryTrace Minerals Research5 mg
• Power Pak Cherry LimeadeTrace Minerals Research5 mg
• Power Pak Concord GrapeTrace Minerals Research5 mg
• Power Pak CranberryTrace Minerals Research5 mg
• Power Pak Lemon LimeTrace Minerals Research5 mg
• Power Pak Mixed BerryTrace Minerals Research5 mg
• Power Pak Orange BlastTrace Minerals Research5 mg
• Power Pak Pina ColadaTrace Minerals Research · off the market5 mg
• Power Pak Pineapple CoconutTrace Minerals Research5 mg
• Power Pak Pomegranate BlueberryTrace Minerals Research5 mg
• Power Pak RaspberryTrace Minerals Research5 mg
• Power Pak TangerineTrace Minerals Research5 mg
• Power Protein 90 Apricot-Maracuya FlavourBody Attack Sports Nutrition14.6 mg
• Power Protein 90 Banana FlavourBody Attack Sports Nutrition14.6 mg
• Power Protein 90 Blueberry-Yoghurt CreamBody Attack Sports Nutrition24 mg
• Power Protein 90 Coconut CreamBody Attack Sports Nutrition15 mg
• Power Shake ChocolatePower Blendz · off the market4 mg
• Power Shake VanillaPower Blendz · off the market4 mg
• Power SoursRainbow Light · off the market10 mg
• Power TeenNatures Plus Source of Life · off the market50 mg
• Power TeenNaturesPlus50 mg
• Power Teen for Her Natural Wild Berry FlavorNatures Plus Source of Life · off the market25 mg
• Power Teen for Her Natural Wild Berry FlavorNaturesPlus Source of Life · off the market25 mg
• Power Teen for Her Wild BerryNaturesPlus Source of Life25 mg
• Power Teen for Him Natural Wild Berry FlavorNatures Plus Source of Life · off the market25 mg
• Power Teen for Him Natural Wild Berry FlavorNaturesPlus Source of Life25 mg
• Power VNature's Bounty45 mg
• Power Weight Gainer Banana FlavourBody Attack Sports Nutrition16 mg
• Power-MultiMixReturn Healthy · off the market4 mg
• Power-Zinc PlusPhysician's Strength1.81 mg
• Powerhouse FormulaGreens Today · off the market17 mg
• PowerPak + Immunity Lemon BerryTrace Minerals5 mg
• PowerPak Acai BerryTrace Minerals5 mg
• PowerPak CitrusTrace Minerals5 mg
• PowerPak Concord GrapeTrace Minerals5 mg
• PowerPak CranberryTrace Minerals5 mg
• PowerPak Guava Passion FruitTrace Minerals5 mg
• PowerPak Lemon LimeTrace Minerals5 mg
• PowerPak Mixed BerryTrace Minerals5 mg
• PowerPak Orange BlastTrace Minerals5 mg
• PowerPak Pineapple Coconut FlavorTrace Minerals5 mg
• PowerPak Pomegranate BlueberryTrace Minerals5 mg
• PowerPak RaspberryTrace Minerals5 mg
• PowerPak TangerineTrace Minerals5 mg
• PowerPak WatermelonTrace Minerals5 mg
• Pqq 20ProCaps Laboratories · off the market5 mg
• PQQ 20 mgProCaps Laboratories · off the market5 mg
• PQQ 20 mgProCaps5 mg

Where next?

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