PlainVitamins

Quercetin 300 mg

by Moss Nutrition · capsule · 60 vegetarian capsules

  • On the market (NIH)
  • UPC M091
  • DSLD label 329176
  • Serving 1 capsule
  • 60 servings

Quercetin 300 mg by Moss Nutrition lists one ingredient: 300 mg of quercetin per serving of 1 capsule. Its current label entered the NIH Dietary Supplement Label Database on April 24, 2025.

What is in Quercetin 300 mg?

Each row as the label prints it, per serving of 1 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).

Quercetin 300 mg: Supplement Facts rows against the market (DSLD label 329176, January 2026 release)
IngredientAmount% DVAmong products listing it
Quercetinas Quercetin Dihydrate300 mgQuercetin in Quercetin 300 mg against 1,548 products300 mg per serving; the middle half of products list 26.5 mg to 250 mg, the median 100 mg.300 mg

Higher than 79% of 1,548 products listing quercetin (median 100 mg). Per day at the most servings: 900 mg.

Source: NIH ODS Dietary Supplement Label Database, label 329176 (entered April 24, 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 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?

6 products list 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: 1 capsule with meals, 1 to 3 times per day or as directed by your healthcare professional.
Warnings
Warning: If you are taking medication, have a medical condition or an upcoming medical procedure, or are pregnant or nursing consult a physician before using.
If adverse reactions occur, discontinue use and consult your healthcare practitioner.
Keep out of reach of children.
Allergens and what it does not contain
Does not contain gluten.
Storage
Store sealed in a cool, dry place.

Source: label statements in DSLD label 329176.

What else is on the label?

Other ingredients: Hypromellose, Microcrystalline Cellulose, Stearate, Silicon Dioxide.

How many labels does Quercetin 300 mg have?

5 labels are on file under this name since February 25, 2019: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 329176 (current) Entered April 24, 2025 · on the market · 60 vegetarian capsules · UPC M091
  2. Label 306498 Entered February 22, 2024 · on the market · 60 vegetarian capsules · UPC M091
  3. Label 247320 Entered May 22, 2021 · off the market March 9, 2023 · 60 vegetarian capsules · UPC M091
  4. Label 217785 Entered April 23, 2020 · off the market February 25, 2021 · 60 vegetarian capsules · UPC M091
  5. Label 188909 Entered February 25, 2019 · off the market November 15, 2019 · 60 vegetarian capsules · UPC M091

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

Who makes it?

The label names Moss Nutrition Products (distributor), Hadley, MA. All Moss Nutrition products.

Where next?