Quercetin belongs to the flavonoid group and is found in many different food types (fruits, vegetables, leaves, and seeds). It has shown promise as both a chemopreventive factor and as a direct anti-cancer drug. The chemoprevention is achieved by modulating a number of pathways that lead to malignant tumor development. It is also available both as an oral drug and as an intravenous infusion.
Several studies suggest that Quercetin, like some other flavonoids, may be of service as chemoprevention for cancer as well as an anti-cancer therapy. It has been shown to interfere with many molecules inside cancer cells (pro-apoptotic proteins, matrix metalloproteinases, and growth factors) and it can also bind to a protein (called G protein) that can activate a pathway that leads to tumor cell death.
Quercitin (and the flavonoid family) could have an effect on a number of different cancer types because all cancer cells are influenced by the apoptosis processes. Quercitin is manly used against prostate cancer and prostate hyperplasia (benign growth), pancreas, gastric, and breast cancers for example. It has been shown also to be a good chemopreventive drug.
We believe that Quercetin can be useful under the scope of a comprehensive integrative oncological care when coupled with other treatment options. We understand that when speaking about its anti-cancer properties, the oral intake is not enough to reach high enough levels of the drug in the bloodstream, therefore we recommend intravenous use in this setting. It is also a therapy that is usually well tolerated by patients without any major side effects.