PlainVitamins

Quercetin Synergy 500

by Gaia Herbs Pro · tablet or pill · 100 tablets

  • On the market (NIH)
  • DSLD label 329508
  • Serving 1 tablet
  • 100 servings

Quercetin Synergy 500 by Gaia Herbs Pro lists 7 ingredients, 7 with an amount per serving of 1 tablet, such as 250 mg of vitamin C, 10 mg of manganese, 500 mg of quercetin and 50 mg of bromelain. Its current label entered the NIH Dietary Supplement Label Database on April 24, 2025.

What is in Quercetin Synergy 500?

Each row as the label prints it, per serving of 1 tablet. 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 Synergy 500: Supplement Facts rows against the market (DSLD label 329508, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Ascorbic Acid250 mg278%Vitamin C in Quercetin Synergy 500 against 18,583 products250 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg250 mg

Higher than 68% of 18,583 products listing vitamin C (median 100 mg).

Manganeseas Manganese Amino Acid Chelate10 mg435%Manganese in Quercetin Synergy 500 against 7,016 products10 mg per serving; the middle half of products list 1 mg to 3.92 mg, the median 2 mg.DV 2.3 mgUL 11 mg10 mg

Higher than 93% of 7,016 products listing manganese (median 2 mg).

Quercetin500 mgQuercetin in Quercetin Synergy 500 against 1,548 products500 mg per serving; the middle half of products list 26.5 mg to 250 mg, the median 100 mg.500 mg

Higher than 84% of 1,548 products listing quercetin (median 100 mg).

Bromelainas Ananas comosus Fruit Extractstandardized to 1800 GDU/g50 mgBromelain in Quercetin Synergy 500 against 1,337 products50 mg per serving; the middle half of products list 25 mg to 200 mg, the median 50 mg.50 mg

50% of 1,337 products listing bromelain give more (median 50 mg).

Turmeric Rhizome Extract50 mgTurmeric in Quercetin Synergy 500 against 2,369 products50 mg per serving; the middle half of products list 50 mg to 500 mg, the median 150 mg.50 mg

71% of 2,369 products listing turmeric give more (median 150 mg).

Curcuminoids47.5 mgCurcuminoid in Quercetin Synergy 500 against 309 products47.5 mg per serving; the middle half of products list 40 mg to 300 mg, the median 100 mg.47.5 mg

69% of 309 products listing curcuminoid give more (median 100 mg).

Citrus Bioflavonoids100 mgFlavonoid in Quercetin Synergy 500 against 2,343 products100 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.100 mg

Higher than 62% of 2,343 products listing flavonoid (median 50 mg).

Source: NIH ODS Dietary Supplement Label Database, label 329508 (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?

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 10 mg of manganese is higher than 93% of the 7,016 manganese products that print an amount; 228 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 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 Quercetin Synergy 500'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 else is on the label?

Other ingredients: Cellulose, Cellulose Gum, Silica, Food Glaze, Vegetable Stearine, Magnesium Stearate, Calcium Silicate, Modified Cellulose.

How many labels does Quercetin Synergy 500 have?

One label is on file, entered on April 24, 2025.

  1. Label 329508 (current) Entered April 24, 2025 · on the market · 100 tablets

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

Who makes it?

The label names Gaia Herbs, Inc. (distributor), Brevard, NC. All Gaia Herbs Pro products.

Where next?