PlainVitamins

Quercetin 300

by NutriCology · capsule · 60 vegetarian capsules

  • On the market (NIH)
  • UPC 7 13947 50060 0
  • DSLD label 258708
  • Serving 1 to 2 capsules; amounts per 2 capsules
  • 30 servings

Quercetin 300 by NutriCology lists 4 ingredients, 4 with an amount per serving of 2 capsules, such as 150 mg of vitamin C, 94.3 mg NE of vitamin E and 600 mg of quercetin dihydrate. Its current label entered the NIH Dietary Supplement Label Database on January 22, 2022.

What is in Quercetin 300?

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).

Quercetin 300: Supplement Facts rows against the market (DSLD label 258708, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Ascorbic Acid150 mg167%Vitamin C in Quercetin 300 against 18,583 products150 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg150 mg

Higher than 58% of 18,583 products listing vitamin C (median 100 mg). Per day at the most servings: 450 mg.

Vitamin Eas DL-Alpha-Tocopheryl Acetate94.3 mg NE628%
D-Alpha-Tocopheryl Acetate140 IU
Quercetin Dihydrate600 mgQuercetin in Quercetin 300 against 1,548 products600 mg per serving; the middle half of products list 26.5 mg to 250 mg, the median 100 mg.600 mg

Higher than 94% of 1,548 products listing quercetin (median 100 mg). Per day at the most servings: 1,800 mg.

Source: NIH ODS Dietary Supplement Label Database, label 258708 (entered January 22, 2022), version 9.4.0. See the label on DSLD. 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 600 mg of quercetin is higher than 94% of the 1,548 quercetin products that print an amount; 88 list more.

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?

1 product lists 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 As a dietary supplement, 1 or 2 capsules one to three times daily with meals, or as directed by a healthcare practitioner.
Warnings
Warning: Consuming this product can expose you to lead which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov/food
Storage
Keep in a cool, dry place, tightly capped.

Source: label statements in DSLD label 258708.

What else is on the label?

Other ingredients: Hydroxypropyl Methylcellulose, Microcrystalline Cellulose, Silicon Dioxide, L-Leucine.

How many labels does Quercetin 300 have?

6 labels are on file under this name since November 21, 2018: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 258708 (current) Entered January 22, 2022 · on the market · 60 vegetarian capsules · UPC 7 13947 50060 0
  2. Label 258707 Entered January 22, 2022 · off the market December 9, 2022 · 60 vegetarian capsules · UPC 7 13947 50060 0
  3. Label 258706 Entered January 22, 2022 · on the market · 60 vegetarian capsules · UPC 7 13947 50060 0
  4. Label 234793 Entered September 25, 2020 · off the market August 2, 2021 · 60 vegetarian capsules · UPC 7 13947 50060 0
  5. Label 234792 Entered September 25, 2020 · off the market August 2, 2021 · 60 vegetarian capsules · UPC 7 13947 50060 0
  6. Label 183756 Entered November 21, 2018 · off the market August 4, 2020 · 60 vegetarian capsules · UPC 7 13947 50060 0

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

Who makes it?

The label names NutriCology (distributor), South Salt Lake, UT. All NutriCology products.

Where next?