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

• 43+DC50 mg
• 43+ Vitamin B-6 Magnesium PotassiumDC50 mg
• 4D Pump Artic IceImage Sports30 mg
• 4D Pump Red LemonadeImage Sports30 mg
• 4Life Transfer Factor Cardio4Life · off the market20 mg
• 4Life Transfer Factor Plus RiteStart Men4Life26 mg
• 4th Quarter Energy Tropical TwistSix Star80 mg
• 5 - HTP 200 mgProtocol For Life Balance · off the market20 mg
• 5 StabilizerSystemic Formulas Bio Command15 mg
• 5% Pre Fruit PunchRich Piana 5% Nutrition39 mg
• 5-hour Energy BerryLiving Essentials30 mg
• 5-hour Energy Extra Strength BerryLiving Essentials40 mg
• 5-hour Energy Extra Strength GrapeLiving Essentials40 mg
• 5-hour Energy GrapeLiving Essentials30 mg
• 5-hour Energy OrangeLiving Essentials30 mg
• 5-hour Energy Pink LemonadeLiving Essentials30 mg
• 5-hour Energy PomegranateLiving Essentials30 mg
• 5-hour Energy Regular Strength GrapeLiving Essentials30 mg
• 5-HTP (5-Hydroxytryptophan) 200 mgProtocol For Life Balance20 mg
• 5-HTP (Griffonia Simplicifolia Extract) 100 mgWindmill5 mg
• 5-Htp 100DC5 mg
• 5-HTP 100 mgRadiance5 mg
• 5-HTP 100 mgHighland Laboratories5 mg
• 5-HTP 100 mgFoster Regal5 mg
• 5-HTP 100 mgEveryday Health10 mg
• 5-HTP 50 mgHighland Laboratories5 mg
• 5-HTP 50 mgH&B Holland & Barrett5 mg
• 5-HTP ComplexHigher Nature15 mg
• 5-HTP+Complex with Ashwagandha & L-TaurinePurely Optimal10 mg
• 5-Hydroxy GabaPriority One Nutritional Supplements25 mg
• 5-Way Metabolic Fat FighterProvida Labs20 mg
• 50 & Wiser MenGarden of Life Vitamin Code16 mg
• 50 & Wiser WomenGarden of Life Vitamin Code16 mg
• 50 PlusGNC Women's Ultra Mega50 mg
• 50 PlusGNC Mega Men50 mg
• 50 Plus FormulaSimply Supplements · off the market18 mg
• 50 Plus MiniGNC Women's Ultra Mega22 mg
• 50 Plus MiniGNC Mega Men22 mg
• 50 Plus MultivitaminApex · off the market17.5 mg
• 50 Plus MultivitaminGNC Mega Men50 mg
• 50 Plus One DailyGNC Women's Ultra Mega22 mg
• 50 Plus One DailyGNC Mega Men · off the market22 mg
• 50 Plus One Daily MultiGNC Mega Men22 mg
• 50 Plus One Daily MultiGNC Mega Men Essentials22 mg
• 50 Plus Theratrum CompleteNature's Blend20 mg
• 50+ Advanced Formula A Thru Z SelectWell At Walgreens20 mg
• 50+ Men Multivitamin + Supporting HerbsSuper Nutrition SimplyOne · off the market50 mg
• 50+ Men Multivitamin + Supporting Herbs Iron FreeSuper Nutrition SimplyOne50 mg
• 50+ Mini-TabRainbow Light · off the market30 mg
• 50+ Mini-TabletRainbow Light · off the market30 mg

Where next?

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