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

• 50+ Mini-TabletsRainbow Light30 mg
• 50+ Mini-Tablets MultivitaminRainbow Light · off the market30 mg
• 50+ Women Multivitamin + Supporting HerbsSuper Nutrition SimplyOne50 mg
• 50+ Women Triple Power MultivitaminsSuper Nutrition SimplyOne · off the market50 mg
• 50+ Women Triple Power Multivitamins Iron FreeSuper Nutrition SimplyOne · off the market50 mg
• 50+ Women's DailyecoNugenics75 mg
• 50+ Women's Ultimate A Thru Z SelectWell At Walgreens14 mg
• 5150 High Stimulant Pre-Workout Green AppleRich Piana 5% Nutrition30 mg
• 55+ Every Man's Daily MultiNew Chapter · off the market20 mg
• 55+ Every Man's One Daily MultiNew Chapter20 mg
• 55+ Every Man's One Daily Whole-Food MultivitaminNew Chapter16 mg
• 55+ Every Woman's Daily MultiNew Chapter · off the market20 mg
• 55+ Every Woman's One Daily MultiNew Chapter20 mg
• 55+ Every Woman's One Daily Whole-Food MultivitaminNew Chapter16 mg
• 6 Hour Power Extreme Energy Shot GrapeStacker 220 mg
• 6 Hour Power Extreme Energy Shot Very BerryStacker 220 mg
• 6bg+DC30 mg
• 7-Keto MuscLeanBeverly International20 mg
• 75 CompleteVitaCeutical Labs · off the market75 mg
• 8 Hour Blue Ice Pop FlavorMuscle Feast8 mg as transcribed, likely a slip
• 8 Hour Energy Powder Green Apple FlavorMuscle Feast8 mg as transcribed, likely a slip
• 8 Hour Energy Powder Peach MangoMuscle Feast6 mg as transcribed, likely a slip
• 8 Hour Energy Powder Watermelon FlavorMuscle Feast8 mg as transcribed, likely a slip
• 8 Hour GrapeMuscle Feast8 mg
• 8 Hour Tangerine FlavorMuscle Feast8 mg as transcribed, likely a slip
• 8 Hour UnflavoredMuscle Feast6 mg as transcribed, likely a slip
• 8-Hour AlertMHP Maximum Human Performance30 mg
• 80 Hour Energy SprayKickers65 mg
• 800/Ultra DDialyvite20 mg
• 9 A Day+Activz · off the market20 mg
• A Thru ZVelocity20 mg
• A Thru Z Active PerformanceWalgreens40 mg
• A-HdBPI Sports25 mg
• A-HD 250 mgBPI25 mg
• A-HD 250 mg Anti-Aromatase Testosterone BoosterBPI25 mg
• A-HD Blue RaspberryBPI25 mg
• A-HD Fruit PunchBPI25 mg
• A-HD WatermelonBPI25 mg
• A-Z Multivitamins & MineralsSimply Supplements16 mg
• A.J.'s Ultra Multi without IronAltrum · off the market80 mg
• A.J.'s Ultra Multi without IronAltrum Nutrition80 mg
• A.m.EXOS Performance Nutrition · off the market60 mg
• A.m.Thorne Research · off the market60 mg
• A.m.Jigsaw Health15 mg
• A.m.Thorne60 mg
• A.M. ActivatorProCaps Laboratories5 mg
• A.R. FormulaDouglas Laboratories2 mg
• A/ O MaximizersDouglas Laboratories40 mg
• a2z Chewable Natural Watermelon FlavordoTERRA · off the market20 mg
• a2z Chewable Strawberry FlavoreddoTERRA20 mg

Where next?

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