Quercetin is a plant pigment (flavonoid) found in fruits and vegetables. It is considered to have anti-inflammatory properties that may improve mental or physical performance and reduce the risk of infection.
Quercetin may be used for:
- Treatment of seasonal allergies
- Prevention of diabetic cataracts
- Treatment of viral infections
- Treatment of cardiovascular disease
- As adjunctive therapy in cancer
- Treatment of chronic prostatitis
- Treatment of interstitial cystitis
What Are Side Effects of Quercetin?
Side effects of quercetin include:
What Foods Contain Quercetin?
Foods that contain quercetin-type flavanols include:
- Apples
- Berries
- Cruciferous vegetables (broccoli, Brussels sprouts, cabbage, cauliflower, collard greens, kale, and turnips)
- Capers
- Grapes
- Onions
- Shallots
- Tea
- Tomatoes
- Many seeds, nuts, flowers, barks, and leaves
Certain medicinal botanicals also contain quercetin, including:
- Ginkgo biloba
- Hypericum perforatum
- Sambucus canadensis
What Drugs Interact with Quercetin?
Quercetin may interact with:
- Everolimus
- Topotecan
- Alvimopan
- Armodafinil
- Ciprofloxacin
- Fexofenadine
- Fleroxacin
- Gemifloxacin
- Levofloxacin
- Loratadine
- Moxifloxacin
- Norfloxacin
- Ofloxacin
Can Quercetin Be Used During Pregnancy or While Breastfeeding?
- There is no information available about the use of quercetin during pregnancy or while breastfeeding. As with any other drug or supplement, it's best to consult your doctor on what would be safe for you.
From 
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Reviewed on 6/30/2022
References
REFERENCES:
Image source: iStock Images
https://reference.medscape.com/drug/quercetin-344495
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4808895/
Image source: iStock Images
https://reference.medscape.com/drug/quercetin-344495
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4808895/