PlainVitamins

Niacin 250 mg

by 21st Century · tablet or pill · 110 tablets

  • On the market (NIH)
  • UPC 7 40985 22849 4
  • DSLD label 258478
  • Serving 1 tablet
  • 110 servings

Niacin 250 mg by 21st Century lists 2 ingredients, 2 with an amount per serving of 1 tablet, such as 250 mg of niacin and 125 mg of calcium. Its current label entered the NIH Dietary Supplement Label Database on January 22, 2022.

What is in Niacin 250 mg?

Each row as the label prints it, per serving of 1 tablet. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Niacin 250 mg: Supplement Facts rows against the market (DSLD label 258478, January 2026 release)
IngredientAmount% DVAmong products listing it
Niacin250 mg1,563%Niacin in Niacin 250 mg against 12,413 products250 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg250 mg

Higher than 96% of 12,413 products listing niacin (median 20 mg). 7.1 times the adult UL a day.

Calciumas Calcium CarbonateCalcium (Form: as Calcium Carbonate)125 mg10%Calcium in Niacin 250 mg against 17,831 products125 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg125 mg

Higher than 53% of 17,831 products listing calcium (median 115 mg).

Source: NIH ODS Dietary Supplement Label Database, label 258478 (entered January 22, 2022), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • At 1 serving a day, the most its directions give, the label lists 250 mg of niacin, 7.1 times the adult Tolerable Upper Intake Level.

The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

6 products list the very same ingredients; the nearest amounts come first.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
Directions: As a vitamin supplement, adults take one (1) tablet daily with any meal or as directed by a healthcare provider. Do not exceed recommended dosage.
Warnings
Do not exceed recommended dosage.
Warning: Consult a healthcare provider prior to use if pregnant, nursing, on medications, have a medical condition or are planning a medical procedure.
Stop use and contact a physician if adverse reactions occur.
Keep out of reach of children.
Do not use if product appears to be tampered with or seal is broken.
Allergens and what it does not contain
No added Sugar, Yeast, Preservatives, Artificial Flavors or Colors.
Gluten free
Storage
Store at room temperature.

Source: label statements in DSLD label 258478.

What else is on the label?

Other ingredients: Hydroxypropyl Methylcellulose, Cellulose, Stearic Acid, Maltodextrin, Contains Less Than 2% of.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Guaranteed quality Laboratory tested.

How many labels does Niacin 250 mg have?

4 labels are on file under this name since July 25, 2012: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 258478 (current) Entered January 22, 2022 · on the market · 110 tablets · UPC 7 40985 22849 4
  2. Label 206568 Entered October 23, 2019 · off the market August 6, 2021 · 110 tablets · UPC 7 40985 22849 4
  3. Label 46274 Entered June 25, 2015 · off the market June 28, 2019 · 110 tablets · UPC 7 40985 22849 4
  4. Label 11479 Entered July 25, 2012 · off the market May 18, 2015 · 110 tablets · UPC 7 40985 22849 4

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names 21st Century HealthCare, Inc. (manufacturer), Tempe, AZ. All 21st Century products.

Where next?