The oxidative stress-reducing effects of dandelion extract was tested on rats with liver damage from carbon tetrachloride (CCl4), a chemical used in fire extinguishers and refrigerants which is highly toxic to the liver. Water-based dandelion extract, or dandelion tea, was observed to significantly reduce the amount of oxidative stress and inflammation present in the livers of rats.
The International Journal of Oncology published a 2008 clinical study showing the positive effects of dandelion leaf tea. Dandelion leaf tea decreased breast cancer cells, but dandelion root tea did not. Researchers went on to test prostate cancer cells and found similar results. The scientists concluded that dandelion extract may be considered a "novel" anti-cancer agent.
The Journal of Ethnopharmacology published a study in January 2011 which tested the effects of dandelion root tea on leukemia cells. The study showed that dandelion root tea killed leukemia cells through a process called apoptosis. It is believed that dandelion root tea signals a "kill switch" on leukemia cell receptors. Researchers found it "interesting" that dandelion root tea did not transmit the same "kill switch" signal to healthy cells. These scientists also believed that dandelion should be considered a "novel" non-toxic anti-cancer agent.
In yet another 2011 study performed with dandelion, dandelion root extract was clinically proven to induce apoptosis in human drug-resistant melanoma cells without poisoning or damaging healthy cells. Once again, tests proved that dandelion root extract should be considered a "novel" and non-toxic therapy for even drug-resistant forms of cancer.
(Imzaia.com) I always marvel at the fact that the most 'common' plants are the ones that keep our physical husk in the best shape and good health. Traditional herbalists have known this all along and I think it is extremely positive that scientists are now finally going back to nature and rediscover what a powerful healer Gaia truly is. That we should consider any plant a 'weed' and therefore a nuisance just shows how much we have forgotten about our connection with Earth.