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Quercetin is among the most abundant natural flavonoids, and it is found in high concentrations in plants such as onions, apples, berries, red wine, broccoli, capers, pomegranate and Ginkgo biloba. The Quercetin used in Gaia Herbs formulations comes from Dimorphandra mollis tree, which is native to the tropical savannah ecoregion of Brazil. It has been studied for its support of the body’s occasional, normal histamine response.*


Quercetin is combined with Turmeric in synergistic formulations that support cardiovascular health, joint health and the respiratory system to promote the bioavailability of Curcumins, the active constituents in Turmeric.* In research supported by Gaia, Quercetin and Curcumins, as well as Resveratrol and Black Pepper, were found to be better absorbed together than individually.

Uses of Quercetin


This information in our Herbal Reference Guide is intended only as a general reference for further exploration, and is not a replacement for professional health advice. This content does not provide dosage information, format recommendations, toxicity levels, or possible interactions with prescription drugs. Accordingly, this information should be used only under the direct supervision of a qualified health practitioner such as a naturopathic physician.

Active Constituents

Parts Used

Important precautions

Additional Resources

Lund KC, Pantuso T. Combination Effects of Quercetin, Resveratrol and Curcumin on in vitro intestinal absorption. J Rest Med 2014;3:112-120.

Ecologically Harvested is a term that describes all herbs sold by Gaia Herbs that are not Certified Organic. Ecologically Harvested herbs include herbs that are harvested in their natural habitat, (i.e., wild harvested) according to specific guidelines for harvesting these herbs (i.e., away from roads and industry, as well as guidelines to avoid overharvesting). Our term, Ecologically Harvested, also includes herbs that are grown in managed woodland areas, fields designated for specific herbs, and herbs that are grown by indigenous growers, such as Kava Kava. All Ecologically Harvested herbs pass pesticide and heavy metal testing as well as microbial testing, prior to release.