C Buffered with Bioflavonoids
by Progressive Professional from Progressive Laboratories · capsule · 90 vegetable capsules
- On the market (NIH)
- UPC 3 51821 00899 8
- DSLD label 261469
- Serving 1 vegetable capsule
- 90 servings
C Buffered with Bioflavonoids by Progressive Professional from Progressive Laboratories lists 6 ingredients, 3 with an amount per serving of 1 vegetable capsule, such as 500 mg of vitamin C, 58 mg of calcium and 50 mg of citrus bioflavonoid complex; 3 sit inside a blend without their own amounts. Its current label entered the NIH Dietary Supplement Label Database on February 23, 2022.
What is in C Buffered with Bioflavonoids?
Each row as the label prints it, per serving of 1 vegetable 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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Vitamin Cas Calcium Ascorbate, Calcium Threonate | 500 mg | 833% | Higher than 81% of 18,583 products listing vitamin C (median 100 mg). |
| Calciumas Calcium Ascorbate Complex, Calcium Threonate | 58 mg | 6% | 70% of 17,831 products listing calcium give more (median 115 mg). |
| Citrus Bioflavonoid Complex | 50 mg | 46% of 2,343 products listing flavonoid give more (median 50 mg). | |
| Hesperidin | no amount given | ||
| Rutin | no amount given | ||
| Quercetin | no amount given |
Source: NIH ODS Dietary Supplement Label Database, label 261469 (entered February 23, 2022), version 9.4.0. See the label on DSLD or its label image (PDF). 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; 3 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 C Buffered with Bioflavonoids's, rare ingredients counting for more.
- Complete C-1000AA Anabolic Agents · off the market 5 shared, 82% alike
- Bio Ascorbate Buffered Vitamin C ComplexSolgar · off the market 5 shared, 81% alike
- Buffered Vitamin C 500 mgWhole Foods 5 shared, 81% alike
- Ultimate C 500Highland Laboratories 5 shared, 81% alike
- Buffered Vitamin C 500 mgBluebonnet 5 shared, 81% alike
- Buffered Vitamin C 1000 mgBluebonnet 5 shared, 81% 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
- Directions: One vegetable capsule daily, or more, as directed by a health care professional.
- Warnings
- Pregnant and/or lactating women should consult their physician prior to use.
- Tamper evident band around cap and seal on bottle. Do not use if either seal is broken or missing.
- Keep out of the reach of children.
Source: label statements in DSLD label 261469.
What else is on the label?
Other ingredients: Rice Flour, Hydroxypropyl Methylcellulose, L-Leucine.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GMP Good Manufacturing Practice Certified GMP Compliant 21 CFR 111.
How many labels does C Buffered with Bioflavonoids have?
One label is on file, entered on February 23, 2022.
- Label 261469 (current) Entered February 23, 2022 · on the market · 90 vegetable capsules · UPC 3 51821 00899 8
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Progressive Laboratories, Inc. (manufacturer), Irving, Texas. All Progressive Professional from Progressive Laboratories products.