PlainVitamins

Activated Quercetin

by Source Naturals · tablet or pill · 200 tablets

  • On the market (NIH)
  • UPC 0 21078 00101 0
  • DSLD label 295557
  • Serving 3 to 6 tablets; amounts per 3 tablets
  • 66 servings

Activated Quercetin by Source Naturals lists 4 ingredients, 4 with an amount per serving of 3 tablets, such as 646 mg of vitamin C, 50 mg of magnesium, 1 g of quercetin and 300 mg of bromelain, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on August 23, 2023.

What is in Activated Quercetin?

Each row as the label prints it, per serving of 3 tablets. 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).

Activated Quercetin: Supplement Facts rows against the market (DSLD label 295557, January 2026 release)
IngredientAmount% DVAmong products listing it
Calories5 Calories
Total Carbohydrates1 g1%Carbohydrate in Activated Quercetin against 21,979 products1 g per serving; the middle half of products list 1 g to 6 g, the median 3 g.1 g

74% of 21,979 products listing carbohydrate give more (median 3 g).

Vitamin Cas Magnesium Ascorbate646 mg1,076%Vitamin C in Activated Quercetin against 18,583 products646 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg646 mg

Higher than 90% of 18,583 products listing vitamin C (median 100 mg).

Magnesiumas Magnesium Ascorbate50 mg13%Magnesium in Activated Quercetin against 14,003 products50 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg50 mg

59% of 14,003 products listing magnesium give more (median 86 mg).

Quercetin1 gQuercetin in Activated Quercetin against 1,548 products1,000 mg per serving; the middle half of products list 26.5 mg to 250 mg, the median 100 mg.1,000 mg

Higher than 96% of 1,548 products listing quercetin (median 100 mg).

Bromelain2,000 G.D.U. per gram, GDU is a standard measure of activity for bromelain300 mgBromelain in Activated Quercetin against 1,337 products300 mg per serving; the middle half of products list 25 mg to 200 mg, the median 50 mg.300 mg

Higher than 84% of 1,337 products listing bromelain (median 50 mg).

Source: NIH ODS Dietary Supplement Label Database, label 295557 (entered August 23, 2023), 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:

  • Its 1,000 mg of quercetin is higher than 96% of the 1,548 quercetin products that print an amount; 15 list more.

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 Activated Quercetin's, rare ingredients counting for more.

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: 3 to 6 tablets daily in divided doses, between meals. If you have a delicate, easily irritated stomach, take with meals.
Warnings
Caution: If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.
Do not use if either tamper-evident seal is broken or missing.
Keep out of the reach of children.
Allergens and what it does not contain
Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.

Source: label statements in DSLD label 295557.

What else is on the label?

Other ingredients: Sorbitol, Stearic Acid, modified Cellulose Gum, Silicon Dioxide, Colloidal, Magnesium Stearate.

How many labels does Activated Quercetin have?

14 labels are on file under this name since October 25, 2013: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 295557 (current) Entered August 23, 2023 · on the market · 200 tablets · UPC 0 21078 00101 0
  2. Label 295555 Entered August 23, 2023 · off the market July 6, 2022 · 100 capsules · UPC 0 21078 01690 8
  3. Label 295556 Entered July 18, 2023 · off the market July 6, 2022 · 200 capsules · UPC 0 21078 01691 5
  4. Label 295554 Entered May 24, 2023 · off the market July 6, 2022 · 100 tablets · UPC 0 21078 00746 3
  5. Label 273309 Entered January 23, 2023 · on the market · 200 capsules · UPC 0 21078 01691 5
  6. Label 273306 Entered January 23, 2023 · on the market · 100 capsules · UPC 0 21078 01690 8
  7. Label 272338 Entered August 23, 2022 · off the market July 6, 2022 · 200 tablets · UPC 0 21078 00101 0
  8. Label 181636 Entered November 21, 2018 · on the market · 50 capsules · UPC 0 21078 01689 2
  9. Label 181642 Entered September 21, 2018 · off the market December 22, 2021 · 200 capsules · UPC 0 21078 01691 5
  10. Label 181640 Entered September 21, 2018 · off the market December 22, 2021 · 100 capsules · UPC 0 21078 01690 8
  11. Label 181576 Entered September 21, 2018 · on the market · 50 tablets · UPC 0 21078 00713 5
  12. Label 72703 Entered April 25, 2017 · off the market December 22, 2021 · 200 tablets · UPC 0 21078 00101 0
  13. Label 72701 Entered April 25, 2017 · on the market · 100 tablets · UPC 0 21078 00746 3
  14. Label 26288 Entered October 25, 2013 · off the market March 24, 2017 · 200 tablets · UPC 0 21078 00101 0

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

Who makes it?

The label names Source Naturals, Inc. (distributor), Santa Cruz, CA. All Source Naturals products.

Where next?