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

• Zero Iron Hi-Potency Multi Vitamin-MineralWonder Laboratories100 mg
• ZincAbsolute Immunity16 mg
• Zinc with ElderberryAbsolute Immunity16 mg
• Zinc with HempAbsolute Immunity16 mg
• zipfizz BerryZipfizz · off the market10 mg
• Zipfizz Berryzf Zipfizz8 mg
• Zipfizz Black CherryZipfizz10 mg
• Zipfizz Fruit PunchZipfizz · off the market10 mg
• Zipfizz Fruit Punchzf Zipfizz10 mg
• zipfizz GrapeZipfizz · off the market10 mg
• Zipfizz Grapezf Zipfizz8 mg
• Zipfizz Orange SodaZipfizz · off the market10 mg
• Zipfizz Orange Sodazf Zipfizz8 mg
• Zipfizz Pink Lemonadezf Zipfizz · off the market10 mg
• Zipfizz Pink LemonadeZipfizz8 mg
• Zm6ILN Iron Labs Nutrition3 mg
• ZONE Arnold PalmerCore Nutritionals16 mg
• Zone BedtimeNutranize · off the market16 mg
• ZONE BerryliciousCore Nutritionals16 mg
• ZONE Sour CandyCore Nutritionals16 mg
• Zoo Friends Complete21st Century Zoo Friends7.5 mg
• Zoo Friends with Extra C21st Century Zoo Friends13.5 mg
• Zoo Friends with Iron21st Century Zoo Friends13.5 mg
• Zoo Friends with Xtra C21st Century Zoo Friends13.5 mg
• Zosterex +BioPerineApproved Science13 mg
• Zow Multi-Vites For Teenage BoysNutrition Now · off the market9 mg
• Zow Multi-Vites For Teenage GirlsNutrition Now · off the market9 mg
• Zuum Lytes Strawberry BananaUMZU10 mg
• ZytenzSynergistic Nutritional Compounds · off the market30 mg

Where next?

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