Quercetin Complex
by Natrol · capsule · 50 capsules
- On the market (NIH)
- UPC 0 47469 00908 3
- DSLD label 287525
- Serving 2 capsules
- 25 servings
Quercetin Complex by Natrol lists 3 ingredients, 3 with an amount per serving of 2 capsules, such as 1,000 mg of vitamin C, 500 mg of quercetin and 66 mg of citrus bioflavonoid complex. Its current label entered the NIH Dietary Supplement Label Database on June 22, 2023.
What is in Quercetin Complex?
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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Vitamin Cas Ascorbic Acid | 1,000 mg | 1,110% | Higher than 91% of 18,583 products listing vitamin C (median 100 mg). |
| Quercetin | 500 mg | Higher than 84% of 1,548 products listing quercetin (median 100 mg). | |
| Citrus Bioflavonoid Complex | 66 mg | Higher than 59% of 2,343 products listing flavonoid (median 50 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 287525 (entered June 22, 2023), 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?
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 1,000 mg of vitamin C is higher than 91% of the 18,583 vitamin C products that print an amount; 445 list more.
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?
3 products list the very same ingredients; the nearest amounts come first.
- Quercetin 250 mgBIOVEA same ingredients
- Super Vitamin CNature's Lab same ingredients
- Quercetin with Citrus BioflavonoidsNATURELO Premium Supplements same ingredients
- Vitamin C with QuercetinIntegrative Therapeutics 3 shared, 85% alike
- FlavonoidsIntensive Nutrition · off the market 2 shared, 81% alike
- Vitamin C 500 mg Plus Grape SeedQuest · off the market 3 shared, 74% 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: Take 2 capsules, one time daily, with a meal.
- Warnings
- Warning: Consult your healthcare professional prior to use if you have or suspect a medical condition, are taking prescription drugs, or are pregnant or lactating.
- Keep out of reach of children.
- Allergens and what it does not contain
- No: Milk, egg, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans, yeast, artificial colors or flavors, added sugar or preservatives
- Storage
- Store in a cool, dry place.
Source: label statements in DSLD label 287525.
What else is on the label?
Other ingredients: Gelatin, Magnesium Stearate, Silicon Dioxide.
How many labels does Quercetin Complex have?
One label is on file, entered on June 22, 2023.
- Label 287525 (current) Entered June 22, 2023 · on the market · 50 capsules · UPC 0 47469 00908 3
DSLD also links this label to: Quercetin 500 mg (image difference, same product), Quercetin 500 mg (image difference, same product), Quercetin 250 mg (image difference, same product), Quercetin (image difference, same product).
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Natrol LLC (manufacturer), Chatsworth, CA. All Natrol products.