Natural C Plus 500
by Douglas Laboratories · tablet or pill · 100 tablets
- Off the market since February 2018 (NIH)
- UPC 3 10539 00668 9
- DSLD label 56630
- Serving 1 tablet
- 100 servings
Natural C Plus 500 by Douglas Laboratories lists 7 ingredients, 2 with an amount per serving of 1 tablet, such as 500 mg of vitamin C and 100 mg of bioflavonoid complex; 5 sit inside a blend without their own amounts. Its current label entered the NIH Dietary Supplement Label Database on February 23, 2016.
What is in Natural C Plus 500?
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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Vitamin Cas Ascorbic Acid | 500 mg | 833% | Higher than 81% of 18,583 products listing vitamin C (median 100 mg). |
| Bioflavonoid ComplexBioflavonoid Complex Note: including | 100 mg | Higher than 62% of 2,343 products listing flavonoid (median 50 mg). | |
| Rutin | no amount given | ||
| Hesperidin | no amount given | ||
| Proprietary Blend (Herb/Botanical) | 21 mg | ||
| Alfalfa | no amount given | ||
| Rose Hips | no amount given | ||
| Acerola | no amount given |
Source: NIH ODS Dietary Supplement Label Database, label 56630 (entered February 23, 2016), 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?
Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient; 5 ingredients sit inside a blend, so their amounts cannot be compared.
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?
The products whose ingredient lists overlap most with Natural C Plus 500's, rare ingredients counting for more.
- C 1000 mg + Rose Hips & BioflavonoidsMason Natural 6 shared, 86% alike
- Ester-C 1000 mgVitabase 6 shared, 81% alike
- PureWay-C 1000 mg Caps with 100 mg BioflavonoidsNewflower Farmers Markets 6 shared, 81% alike
- C 500 mg with Rose Hips and BioflavonoidsMason Natural 6 shared, 81% alike
- Optimum-C FormulaBluebonnet 6 shared, 73% alike
- C Extra 500 mg Plus 500 mg BioflavonoidsNatural Factors 5 shared, 70% alike
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 tablet daily or as directed by your healthcare professional.
- 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, milk/dairy, corn, sodium, sugar, starch, artificial coloring, artificial flavoring, artificial preservatives or genetically modified organisms (GMOs).
- 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 56630.
What else is on the label?
Other ingredients: Cellulose, Vegetable Stearate, Silica.
How many labels does Natural C Plus 500 have?
6 labels are on file under this name since January 25, 2012: other sizes, label designs and reformulations. The current one leads this page.
- Label 56630 (current) Entered February 23, 2016 · off the market February 26, 2018 · 100 tablets · UPC 3 10539 00668 9
- Label 26855 Entered October 25, 2013 · off the market February 26, 2018 · 250 tablets · UPC 3 10539 00720 4
- Label 26854 Entered October 25, 2013 · off the market December 15, 2015 · 100 tablets · UPC 3 10539 00668 9
- Label 8187 Entered June 25, 2012 · off the market August 27, 2013 · 100 tablets · UPC 3 10539 00668 9
- Label 8192 Entered April 26, 2012 · off the market August 27, 2013 · 250 tablets · UPC 3 10539 00720 4
- Label 5226 Entered January 25, 2012 · off the market January 20, 2012 · 100 tablets · UPC 3 10539 00668 9
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.