PlainVitamins

Ultra-C

by Douglas Laboratories · capsule · 250 capsules

  • On the market (NIH)
  • UPC 3 10539 01843 9
  • DSLD label 9206
  • Serving 1 capsule
  • 250 servings

Ultra-C by Douglas Laboratories lists 3 ingredients, 3 with an amount per serving of 1 capsule, such as 300 mg of vitamin C, 300 mg of lemon bioflavonoids and 50 mg of rutin. Its current label entered the NIH Dietary Supplement Label Database on June 25, 2012.

What is in Ultra-C?

Each row as the label prints it, per serving of 1 capsule. 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).

Ultra-C: Supplement Facts rows against the market (DSLD label 9206, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Ascorbic Acid300 mg500%Vitamin C in Ultra-C against 18,583 products300 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg300 mg

Higher than 75% of 18,583 products listing vitamin C (median 100 mg). Per day at the most servings: 600 mg.

Lemon Bioflavonoids300 mgFlavonoid in Ultra-C against 2,343 products300 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.300 mg

Higher than 92% of 2,343 products listing flavonoid (median 50 mg). Per day at the most servings: 600 mg.

Rutin50 mgRutin in Ultra-C against 1,232 products50 mg per serving; the middle half of products list 10 mg to 50 mg, the median 25 mg.50 mg

Higher than 69% of 1,232 products listing rutin (median 25 mg). Per day at the most servings: 100 mg.

Source: NIH ODS Dietary Supplement Label Database, label 9206 (entered June 25, 2012), 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:

  • Its 300 mg of lemon bioflavonoids (filed by NIH under flavonoid) is higher than 92% of the 2,343 flavonoid products that print an amount; 167 list more.

The NIH database records 2 servings 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
Suggested Usage: As a dietary supplement, adults take 1 capsule 2 times daily or as directed by physician.
Warnings
KEEP OUT OF REACH OF CHILDREN.
Tamper resistant package, do not use if outer seal is missing.
Allergens and what it does not contain
This product contains NO yeast, wheat gluten, soy protein, milk/dairy, corn, sodium, sugar, starch, artificial coloring, preservatives or flavoring.
Storage
For optimal storage conditions, store in a cool, dry place. (59(0)-77(0)F/15(0)-25(0)C) (35-65% relative humidity)

Source: label statements in DSLD label 9206.

What else is on the label?

Other ingredients: Gelatin, Cellulose, Vegetable Stearate.

How many labels does Ultra-C have?

2 labels are on file under this name since June 1, 2012: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 9206 (current) Entered June 25, 2012 · on the market · 250 capsules · UPC 3 10539 01843 9
  2. Label 9204 Entered June 1, 2012 · on the market · 90 capsules · UPC 3 10539 00315 2

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

Who makes it?

The label names Douglas Laboratories (manufacturer), Pittsburgh, PA. All Douglas Laboratories products.

Where next?