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  • Writer's pictureDr. Kathleen Jones

The Antioxidant Power of Quercetin

Updated: Jul 19, 2022

What exactly is quercetin? Quercetin is a powerful antioxidant that is being studied more and more for its wide range of promising health benefits. Quercetin belongs to a group of plant nutrients called flavonoids. Besides giving fruits and vegetables their vibrant colors, flavonoids are renowned for counteracting free radicals (unstable atoms) in the body, which are understood to accelerate illness and aging when left unchecked.

What have researchers learned about quercetin?

In a comprehensive study published by the National Institute of Health in 2020, quercetin was found to have positive effects on several types of illness. Researchers confirmed that quercetin supports healthy cell growth, actively suppresses abnormal cell growth, and “exerts a marked effect on immunity and inflammation”, pointing to a lower risk of infection and cancer. It was also noted that quercetin had the ability to improve insulin sensitivity and lower blood sugar, an encouraging sign for diabetes research. Regular quercetin consumption has been shown to improve heart health by lowering systolic blood pressure and by stabilizing angiotensin, a blood protein which controls blood vessel constriction. But wait - there’s more! Quercetin is also being studied for its potential to improve neurological diseases, control prostate inflammation, and even help with allergy symptoms.

Which foods contain the most quercetin?

Many fruits, vegetables, tea, wine, and grains contain quercetin. You’ll find the highest amounts in onions, broccoli, kale, tomatoes, apples, grapes, berries/cherries, and citrus fruits. Buckwheat, red wine, and black tea, bilberry and ginkgo are also rich in quercetin.

What about quercetin supplements?

Taking a quercetin supplement is a great way to make sure your body is getting an extra health boost. Due to the plethora of options available, choosing what kind of supplement to take can be confusing or downright overwhelming - let us help! We source all of our vitamins and supplements from Metagenics, a reputable company renowned in the naturopathic world for their rigorous quality and testing standards. One of our favorite supplements is the Immune Defense Pack - it has it all! Call us at (614) 985-1435 with any questions you may have or visit our online store at to browse the supplements we offer.


Sissons, Beth. 2019. What are the benefits of quercetin? Medical News Today.

DeBusk, Christina. 2022. Vitamin C with quercetin benefits for inflammation, COVID, heart disease, Type II diabetes. Chiropractic Economics.

Various authors. 2020. Therapeutic Potential of Quercetin: New Insights and Perspectives for Human Health. National Institute of Health.


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