Quercetin 500
by GNC · tablet or pill · 60 tablets
- Off the market since December 2022 (NIH)
- UPC 0 48107 05983 5
- DSLD label 1408
- Serving 1 tablet
Quercetin 500 by GNC lists 2 ingredients, 2 with an amount per serving of 1 tablet, such as 146 mg of calcium and 500 mg of quercetin dihydrate. Its current label entered the NIH Dietary Supplement Label Database on October 26, 2011.
What is in Quercetin 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 |
|---|---|---|---|
| Calciumas Calcium CarbonateCalcium (Form: as Calcium Carbonate) | 146 mg | 15% | Higher than 58% of 17,831 products listing calcium (median 115 mg). |
| Quercetin Dihydrate | 500 mg | Higher than 84% of 1,548 products listing quercetin (median 100 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 1408 (entered October 26, 2011), 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.
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 Quercetin 500's, rare ingredients counting for more.
- Quercetin 1000 mgGNC Preventive Nutrition 1 shared, 69% alike
- QuercetoneThorne Research · off the market 1 shared, 69% alike
- Quercetin 600 mgVitamin World · off the market 1 shared, 69% alike
- Quercetin 500 mgNature's Harmony 1 shared, 69% alike
- Quercetin Dihydrate PurePureBulk.com 1 shared, 69% alike
- Quercetin-SNutri-West 1 shared, 69% 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: As a dietary supplement, take one tablet daily.
- Warnings
- KEEP OUT OF REACH OF CHILDREN
- Allergens and what it does not contain
- No Sugar, No Artificial Colors, No Artificial Flavors, No Preservatives, Sodium Free, No Wheat, No Gluten, No Soy, No Dairy, Yeast Free.
- Storage
- Store in a cool, dry place.
Source: label statements in DSLD label 1408.
What else is on the label?
Other ingredients: Calcium Carbonate, Dicalcium Phosphate, Cellulose, Pharmaceutical Glaze.
How many labels does Quercetin 500 have?
One label is on file, entered on October 26, 2011.
- Label 1408 (current) Entered October 26, 2011 · off the market December 13, 2022 · 60 tablets · UPC 0 48107 05983 5
DSLD also links this label to: Quercetin 500 mg (image difference, same product), Quercetin 500 mg (image difference, same product), Quercetin 500 mg (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 General Nutrition Corp. (distributor), Pittsburgh, PA. All GNC products.