Red Raspberry Leaves Kill Colon Cancer
Researchers from Coatia’s University of Zagreb have determined that red raspberry leaves contain bioactive substances that kill colon cancer cells and produce significant antioxidant potential that helps prevent throat cancer.
The researchers tested raspberry leaves against human cancer cell lines for laryngeal carcinoma (throat cancer) and colon adenocarcinoma (colorectal cancer). They found that the raspberry leaves had a significant cytotoxic (cancer cell-killing) effect upon the colon cancer cells, and a “chemoprotective” antioxidant effect against throat cancer cells.
They analyzed the leaves and found them rich in a variety of polyphenols and antioxidants.
To test their relative antioxidant effects, they treated the cells with hydrogen peroxide.
Red raspberry leaves – notably from the Meeker variety – are one of the few plants that contain an anti-carcinogenic substance called ellagitannins. As the ellagitannins are absorbed, the tannins are released, which releases highly absorbed ellagic acid. Real Natural has reported previously on anticancer research involving ellagic acid. Ellagic acid cleanses cells of oxidative radicals, and stimulates a cell death switch in cancer cells.
Red raspberries are native to North America. They grow profusely in nature, especially in the northwestern U.S.
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Durgo K, Belščak-Cvitanović A, Stančić A, Franekić J, Komes D. The Bioactive Potential of Red Raspberry (Rubus idaeus L.) Leaves in Exhibiting Cytotoxic and Cytoprotective Activity on Human Laryngeal Carcinoma and Colon Adenocarcinoma. J Med Food. 2012 Mar;15(3):258-68.