Quercetin supplements have been used to battle the flu for many years. Now, a new study confirms once again that quercetin has the ability to support immune function.
The new research shows that quercetin significantly reduces susceptibility to the flu, quite encouraging news in the middle of the flu season. A naturally occurring bioflavonoid found in fruits, vegetables, leaves and grains, quercetin contains powerful antioxidant properties and, like other bioflavonoids, has the ability to stabilize cell membranes. Foods containing quercetin include cranberries, lingonberries, blueberries, red grapes, red delicious apples, tomatoes, sweet potato, kale, watercress, red onion, and black plums. Available as a dietary supplement, quercetin has been widely used for many years without major side effects.
In this latest animal study, mice were exposed to the flu virus under various conditions, including increased stress from exercise. The mice given quercetin offset the adverse effects of stress and showed much less susceptibility to the flu. The researchers noted that “a recent human study found that people who took quercetin suffered fewer illnesses following three days of exhaustive exercise compared to those who did not. Unlike the mouse study, the humans were not inoculated with a virus.”
Additionally, previous studies have shown that quercetin may have anti-inflammatory properties, and it is being investigated for a wide range of potential health benefits. It has demonstrated significant anti-inflammatory activity by inhibiting both manufacture and release of histamine and other allergic and inflammatory mediators. It exerts potent antioxidant activity and vitamin C-sparing action. Doctors may recommend 200–500 mg of quercetin taken two to three times per day.
|Bluebonnet Nutrition – Super Quercetin – 100 Vegetarian Capsules|
|Jarrow Formulas – Quercetin 500 mg. – 200 Capsules|
|Twinlab – Quercetin + C – 100 Capsules|