Should you take quercetin for immune health? What you need to know
This antioxidant, found in many foods, could boost your immune health.
Mercey LivingstonCNET Contributor
Mercey Livingston is a health and wellness writer and certified Integrative Nutrition Health Coach. She's written about fitness and wellness for Well+Good, Women's Health, Business Insider, and Prevention.com among others. When not writing, she enjoys reading and trying out workout classes all over New York City.
Pandemic or not, supplements can be confusing. And when it comes to immune health, it seems like there's a new supplement on the market everyday, so it's hard to weed out which are worth buying. Taking targeted supplements that are science-backed can be a smart move to keep yourself well, especially as flu season is approaching.
One supplement you may have heard of recently is quercetin -- a flavonoid that acts as a powerful antioxidant and has reported benefits for immune health, lowering inflammation and -- in some cases -- fighting cancer. To find out if it's worth adding to your supplement lineup, keep reading for more on the science behind quercetin and insights from dietician nutritionist, Amy Shapiro.
What is quercetin?
Quercetin is a flavonoid found naturally in many plants and foods like apples, grapes and broccoli. "It donates electrons to free radicals, preventing inflammation and histamine development in the body," Shapiro says.
Quercetin is popular as a supplement, often combined with other nutrients such as bromelain or vitamin C because it is not easily absorbed and used in the body on its own. "When paired with vitamin C, it is more potent [in the body] and vitamin C helps to regenerate quercetin within the body," Shapiro says.
Anti-allergy:Research shows that quercetin may block histamine, making it a natural allergy relief or preventive alternative to medications.
Anti-inflammatory: Research on animals shows that quercetin has anti-inflammatory properties. In human studies, it reduced inflammation in men but it did not seem to help reduce inflammation in women with rheumatoid arthritis.
According to Shapiro, if you're committed to eating a lot of the fruits and veggies on this list, you will probably consume about 100 to 300 mg of quercetin daily. So if you're aiming for 500 mg a day, that will be trickier with food alone -- you'll likely need a supplement too.
"Most people do not eat enough plants during the day, so a supplement would make sense. Supplements usually pair Quercetin with vitamin C or Bromelain which help to improve absorption and potency. Most people can take 500 mg to start and can work their way up to 1000 mg from a supplement daily to get the health protective effects," Shapiro says.
Editor's note, August 31, 2020: A previous version of this article included information about quercetin being studied as a potential preventative for contracting the coronavirus or as treatment for COVID-19, the disease the virus causes. Because there is not sufficient scientific research to support that quercetin can prevent or treat the coronavirus, we've removed that from the article.
The information contained in this article is for educational and informational purposes only and is not intended as health or medical advice. Always consult a physician or other qualified health provider regarding any questions you may have about a medical condition or health objectives.