Many factors may contribute to the development of cancer, such as smoking, radiation, genetic factors, carcinogens. On the other hand, some herbs and food may have anti-tumor activity. We know colon cancer is one of the leading cancers in US and EU. One thing that is different in Asia/China from US/EU, among others, is much more Tofu in every day food. We know tyrosine kinase inhibitors are potent anti-cancer products, some are already approved for the treatment of some types of leukemia. A fact is that Tofu contains quite a lot of nature tyrosine kinase inhibitors, such as genistein.