Quercetin 20x Plus
by XYMOGEN · capsule · 60 vegetarian capsules
- On the market (NIH)
- UPC 7 22537 51269 5
- DSLD label 335557
- Serving 2 capsules
- 30 servings
Quercetin 20x Plus by XYMOGEN lists 3 ingredients, 3 with an amount per serving of 2 capsules, such as 200 mg of vitamin C, 200 mg of nettle leaf extract and 100 mg of N-acetyl cysteine. Its current label entered the NIH Dietary Supplement Label Database on September 25, 2025.
What is in Quercetin 20x Plus?
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 | 200 mg | 222% | Higher than 63% of 18,583 products listing vitamin C (median 100 mg). |
| Quercefitas Quercetin Phospholipid | 250 mg | ||
| Nettle Leaf Extractas Urtica dioica Leaf Extract, Urtica urens Leaf Extract | 200 mg | Higher than 61% of 710 products listing stinging nettle (median 120 mg). | |
| N-Acetyl Cysteine | 100 mg | 57% of 1,259 products listing N-acetyl cysteine give more (median 150 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 335557 (entered September 25, 2025), 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?
1 product lists the very same ingredients; the nearest amounts come first.
- PollenaseEcological Formulas same ingredients
- NAC 500 N-Acetyl CysteineProCaps Laboratories · off the market 2 shared, 59% alike
- NAC 500 mgProCaps Laboratories · off the market 2 shared, 59% alike
- NAC 500ProCaps Laboratories 2 shared, 59% alike
- NanoNAC+BioPharma Scientific 2 shared, 59% alike
- Natural D-HistOrtho Molecular Products 3 shared, 58% 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 two capsules daily, or use as directed by your healthcare professional.
- Warnings
- Consult your healthcare professional before use. Do not use if tamper seal is damaged.
- Individuals taking medication should discuss potential interactions with their healthcare professional.
- Storage: Keep tightly closed in a cool, dry place out of reach of children.
- Allergens and what it does not contain
- Formulated to exclude: Wheat, gluten, yeast, soy, animal and dairy products, fish, shellfish, peanuts, tree nuts, egg, sesame, ingredients derived from genetically modified organisms (GMOs), artificial colors, and artificial sweeteners.
Source: label statements in DSLD label 335557.
What else is on the label?
Other ingredients: Hypromellose, Water, Ascorbyl Palmitate, Silica.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): ePV (ePedigree Verification); GMP Compliant Third-Party Verified.
How many labels does Quercetin 20x Plus have?
2 labels are on file under this name since July 24, 2025: other sizes, label designs and reformulations. The current one leads this page.
- Label 335557 (current) Entered September 25, 2025 · on the market · 60 vegetarian capsules · UPC 7 22537 51269 5
- Label 335558 Entered July 24, 2025 · on the market · 120 vegetarian capsules · UPC 7 22537 51270 1
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names XYMOGEN Exclusive Professional Formulas (manufacturer), Orlando, FL. All XYMOGEN products.