by Geri Walton ~ January 22nd, 2009
Numerous studies have been done on the health benefits of quercetin, which are the pigments found in plants. Many scientists agree quercetin is beneficial to your health in a variety of ways. It is beneficial because quercetin is a natural and abundant phytochemical, known as a flavonoid, and flavonoids are important because they seem to enhance the function of vitamin C so that it is better absorbed by the body. Quercetin is also an antioxidant, and antioxidants are responsible to control and fight disease-causing free radicals.
There have also been many studies about quercetin, and many have indicated significant anti-inflammatory properties may be present in quercetin. For instance, Paul Kroon, lead researcher in one athersclerosis study stated, “we can confirm that eating quercetin-rich foods may help prevent chronic inflammation leading to cardiovascular disease because the metabolites still have an effect on the cells lining the blood vessels.” A study conducted in 2003 also noted quercetin’s ability to modulate the inflammatory response. In the 2003 study inflammation was induced in rats with carrageenan, and quercetin was able to suppress the inflammation successfully.
It also seems quercetin doesn’t just quiet inflammation. The British Journal of Cancer published an article asserting quercetin seems to have anti-tumor properties. Another study conducted in 2005 found quercetin may indeed have “chemotherapeutic potential or chemoprevention of human cancers,” and, for that reason, researchers want further investigations done into quercetin so its true medicinal capabilities can be accurately determined.
As mentioned, quercetin is found primarily in plants, such as fruits, vegetables, and herbs. If you’re interested in making sure you get quercetin into your daily diet, here’s a list of foods that contain some of the highest quercetin levels:
|Quercetin Food||mg/100g||Quercetin Food||mg/100g|
|Green Tea Leaves, dried||255.55||Jalapeno Hot Peppers||5.07|
|Black Tea Leaves, dried||204.66||Coriander, raw||5.00|
|Yellow Wax Hot Peppers||50.63||Watercress||4.00|
|Onions, red, raw||19.93||Yellow Snap Beans||3.03|
|Green Hot Chili Peppers||16.80||Cherry Tomatoes||2.77|
|Cranberry Juice, raw||16.41||Green Snap Peas||2.73|
|Serrano Hot Peppers||15.98||Apricots||2.55|
|Scallions, raw||14.24||Grapes, black||2.54|
|Cranberries, raw||14.02||Iceberg Lettuce||2.47|
|Tarragon, fresh||10.00||Currants, white||1.95|
|Chokeberries, frozen||8.90||Tomato Juice||1.46|
|Kale, raw||7.71||Plums, raw||1.20|
|Black Currants, raw||5.69||Broccoli, cooked||1.06|
|Onions, white raw||5.19||Blackberries||1.03|