Quercetin Bioflavonoid Complex
by Natural Factors · capsule · 90 capsules
- Off the market since May 2017 (NIH)
- UPC 0 68958 01387 9
- DSLD label 8221
- Serving 1 capsule
Quercetin Bioflavonoid Complex by Natural Factors lists 4 ingredients, 4 with an amount per serving of 1 capsule, such as 235 mg of quercetin, 235 mg of citrus bioflavonoids, 45 mg of bromelain and 45 mg of rutin, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on April 26, 2012.
What is in Quercetin Bioflavonoid Complex?
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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Total Carbohydrates | less than 1 g | 1% | |
| Quercetin | 235 mg | Higher than 71% of 1,548 products listing quercetin (median 100 mg). Per day at the most servings: 705 mg. | |
| Citrus Bioflavonoidsas citrus peelsCitrus Bioflavonoids (Form: from citrus peels) | 235 mg | Higher than 88% of 2,343 products listing flavonoid (median 50 mg). Per day at the most servings: 705 mg. | |
| Bromelainas PineappleBromelain 1000 GDU (Form: from pineapple stems) | 45 mg | 61% of 1,337 products listing bromelain give more (median 50 mg). Per day at the most servings: 135 mg. | |
| Rutin | 45 mg | Higher than 68% of 1,232 products listing rutin (median 25 mg). Per day at the most servings: 135 mg. |
Source: NIH ODS Dietary Supplement Label Database, label 8221 (entered April 26, 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?
Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.
The NIH database records 1 to 3 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?
The products whose ingredient lists overlap most with Quercetin Bioflavonoid Complex's, rare ingredients counting for more.
- Bioflavonoid ComplexKlaire Labs 3 shared, 69% alike
- Mega QuercetinSolaray · off the market 4 shared, 65% alike
- Mega Quercetin 600 mgSolaray 4 shared, 65% alike
- Poly CUSANA 3 shared, 63% alike
- Aller-CQVQ Verified Quality 3 shared, 59% alike
- Quercetin Complex with Ester-C PlusSolgar · off the market 5 shared, 57% 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: 1 capsule, 1-3 times per day or as directed by a health professional.
- Warnings
- Keep out of reach of children.
- Sealed for your protection. Do not use if seal is broken.
- Allergens and what it does not contain
- Contains no artificial preservatives, color or sweeteners; no dairy, soy, starch, wheat or yeast.
- Storage
- For freshness store in a cool, dry place.
Source: label statements in DSLD label 8221.
What else is on the label?
Other ingredients: Gelatin capsule, Rice Flour, Magnesium Stearate, Silicon Dioxide.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): (recycle) Recyclable container; Purity & Potency Guaranteed.
How many labels does Quercetin Bioflavonoid Complex have?
2 labels are on file under this name since April 26, 2012: other sizes, label designs and reformulations. The current one leads this page.
- Label 8221 (current) Entered April 26, 2012 · off the market May 6, 2017 · 90 capsules · UPC 0 68958 01387 9
- Label 8220 Entered April 26, 2012 · off the market May 6, 2017 · 60 capsules · UPC 0 68958 01386 2
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Natural Factors Canada (manufacturer). All Natural Factors products.