PlainVitamins

Quercetin Bioflavonoids

by NutriCology · capsule · 100 vegetarian capsules

  • On the market (NIH)
  • UPC 7 13947 50050 1
  • DSLD label 234791
  • Serving 1 to 2 capsules; amounts per 2 capsules
  • 50 servings

Quercetin Bioflavonoids by NutriCology lists 4 ingredients, 4 with an amount per serving of 2 capsules, such as 800 mg of lemon bioflavonoid complex, 100 mg of quercetin, 100 mg of citrus (fruit) extract and 100 mg of rutin. Its current label entered the NIH Dietary Supplement Label Database on September 25, 2020.

What is in Quercetin Bioflavonoids?

Each row as the label prints it, per serving of 2 capsules. 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).

Quercetin Bioflavonoids: Supplement Facts rows against the market (DSLD label 234791, January 2026 release)
IngredientAmount% DVAmong products listing it
Lemon Bioflavonoid Complex800 mgFlavonoid in Quercetin Bioflavonoids against 2,343 products800 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.800 mg

Higher than 99% of 2,343 products listing flavonoid (median 50 mg). Per day at the most servings: 2,400 mg.

Quercetin100 mgQuercetin in Quercetin Bioflavonoids against 1,548 products100 mg per serving; the middle half of products list 26.5 mg to 250 mg, the median 100 mg.100 mg

40% of 1,548 products listing quercetin give more (median 100 mg). Per day at the most servings: 300 mg.

Citrus (fruit) extractas HesperidinCitrus (fruit) extract (Form: containing 92% Hesperidin) PlantPart: fruit100 mgCitrus in Quercetin Bioflavonoids against 69 products100 mg per serving; the middle half of products list 28 mg to 200 mg, the median 85 mg.100 mg

Higher than 52% of 69 products listing citrus (median 85 mg). Per day at the most servings: 300 mg.

Rutin100 mgRutin in Quercetin Bioflavonoids against 1,232 products100 mg per serving; the middle half of products list 10 mg to 50 mg, the median 25 mg.100 mg

Higher than 84% of 1,232 products listing rutin (median 25 mg). Per day at the most servings: 300 mg.

Source: NIH ODS Dietary Supplement Label Database, label 234791 (entered September 25, 2020), 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 800 mg of lemon bioflavonoid complex (filed by NIH under flavonoid) is higher than 99% of the 2,343 flavonoid products that print an amount; 30 list more.

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?

1 product lists 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 Use As a dietary supplement, 1 or 2 capsules one to three times daily with meals, or as directed by a healthcare practitioner.
Warnings
Warning: Consuming this product can expose you to lead which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov/food
Storage
Keep in a cool, dry place, tightly capped.

Source: label statements in DSLD label 234791.

What else is on the label?

Other ingredients: Hydroxypropyl Methylcellulose, Microcrystalline Cellulose, L-Leucine.

How many labels does Quercetin Bioflavonoids have?

3 labels are on file under this name since November 21, 2018: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 234791 (current) Entered September 25, 2020 · on the market · 100 vegetarian capsules · UPC 7 13947 50050 1
  2. Label 234790 Entered September 25, 2020 · on the market · 100 vegetarian capsules · UPC 7 13947 50050 1
  3. Label 183749 Entered November 21, 2018 · off the market August 4, 2020 · 100 vegetarian capsules · UPC 7 13947 50050 1

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

Who makes it?

The label names NutriCology (distributor), South Salt Lake, UT. All NutriCology products.

Where next?