Bio-Quercetin
by Life Extension · capsule · 30 vegetarian capsules
- On the market (NIH)
- UPC 7 37870 23023 6
- DSLD label 325831
- Serving 1 vegetarian capsule
- 30 servings
Bio-Quercetin by Life Extension lists 2 ingredients, 2 with an amount per serving of 1 vegetarian capsule. Its current label entered the NIH Dietary Supplement Label Database on November 22, 2024.
What is in Bio-Quercetin?
Each row as the label prints it, per serving of 1 vegetarian 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 |
|---|---|---|---|
| Bio-Quercetin Proprietary Blend | 30 mg | ||
| Quercetinas Japanese Sophora Concentrate35% | 10 mg | 90% of 1,548 products listing quercetin give more (median 100 mg). | |
| Galactomannansas Fenugreek30% | 8 mg |
Source: NIH ODS Dietary Supplement Label Database, label 325831 (entered November 22, 2024), 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:
- 90% of the 1,548 products that print an amount of quercetin list more than its 10 mg of quercetin (median 100 mg).
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 Bio-Quercetin's, rare ingredients counting for more.
- Vegan Digestive FibersKala Health 1 shared, 68% alike
- Optimized ResveratrolLife Extension 2 shared, 56% alike
- Professional Strength Curcumin 500 mgH!D Hallelujah Diet 1 shared, 53% alike
- Resveratrol EliteLife Extension 1 shared, 50% alike
- Bio-FisetinLife Extension 1 shared, 41% alike
- Vitamin CLife Extension 1 shared, 40% 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 one (1) capsule daily, or as recommended by a healthcare practitioner.
- 1 daily
- Warnings
- Read the entire label and follow directions carefully.
- Do not exceed recommended dose. Do not purchase if outer seal is damaged.
- Consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.
- To report a serious adverse event or obtain product information, contact 1-866-280-2852.
- Allergens and what it does not contain
- Gluten Free
- Non GMO LE Certified
- Storage
- Store tightly closed in a cool, dry place.
Source: label statements in DSLD label 325831.
What else is on the label?
Other ingredients: Microcrystalline Cellulose, Cellulose, Stearate, Sunflower Lecithin, Silica, Sunflower Oil.
How many labels does Bio-Quercetin have?
4 labels are on file under this name since January 25, 2020: other sizes, label designs and reformulations. The current one leads this page.
- Label 325831 (current) Entered November 22, 2024 · on the market · 30 vegetarian capsules · UPC 7 37870 23023 6
- Label 232797 Entered August 23, 2020 · off the market July 14, 2020 · 30 vegetarian capsules · UPC 7 37870 23023 6
- Label 232452 Entered August 23, 2020 · on the market · 30 vegetarian capsules · UPC 7 37870 23023 6
- Label 210981 Entered January 25, 2020 · on the market · 30 vegetarian capsules · UPC 7 37870 23023 6
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Quality Supplements and Vitamins, Inc. (distributor), Ft. Lauderdale, FL. All Life Extension products.