What Is Quercetin?

Quercetin is a flavonoid found in a number of different plants and is claimed to provide many health benefits. The flavonoid can be obtained through the diet (from eating certain fruits and vegetables) but also comes in the form of a dietary supplement.
Quercetin appears to have numerous different actions that could contribute to its medicinal activity. It seems to work as an antioxidant and may also have anti-inflammatory effects. It might inhibit the growth and division of certain cells, including cancer cells, and may have anti-estrogen effects (which could possibly contribute to some effect on hormone-related cancers, such as breast cancer). For allergies, quercetin might work by inhibiting the release of histamine.
These are just a few ways that researchers have suggested that quercetin may work for a variety of conditions. At this time, it is not fully known how the different activities of quercetin may work together (or even if the flavonoid really works for most uses).
(Click Quercetin for more information on what quercetin is and what it is used for, to find out what side effects may occur with this supplement, and to learn about warnings and precautions associated with the product.)
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