Eating the right food is one way to lower your cancer risk. But there
are a few specific ingredients that are shown to give a boost to those
benefits.
Although further study is needed, tumeric, cinnamon
and soy products have shown promise as cancer fighters. The articles
below explain how chemicals in these ingredients work, and how to best
include them in your diet. 
Turmeric Adds Spice to Your Health
One of the keys to tumor suppression could possibly lie in the Indian spice turmeric. Often used in curry dishes, it's commonly known as "Indian solid gold" for its proven health benefits.
Various scientific studies have shown that the yellow compound in turmeric, curcumin,
contains potent antioxidant and anti-inflammatory properties. These can
inhibit tumor cell growth and suppress enzymes that activate
carcinogens.
Cinnamon: Common Spice Takes a Stand Against CancerBharat Aggarwal, Ph.D., professor in MD Anderson's Department of Experimental Therapeutics, led a 2009 review of 41 common dietary spices and how they impact the various phases of tumorigenesis, the formation of tumors.
Aggarwal's study showed that many spices, including cinnamon, are promising preventive and treatment agents for cancer. Cinnamon nutraceuticals, part of a food that provides medical or health benefits, were given to mice. Results showed that they inhibited multiple pro-inflammatory pathways in cancer cells.
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The Pros and Cons of Soy: More Study NeededSoy milk, tofu and edamame are just a few of the many soy-rich foods touted for helping individuals reduce cholesterol levels and minimize risk of heart disease. But is soy just as beneficial for fighting cancer?
A recent study indicates that it is, but the question of whether tofu and other soy-rich foods can combat tumor growth has not been definitively answered.
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Thank you for this information.
I will work to increase my intake of cinnamon - seems a pleasant task! I already take turmeric (2 tsp daily) and it cleared my fatigue rapidly. I'm interested in others who have had this benefit from turmeric. It seems not to be an effect of curcumin, as taking it allows my fatigue to come back.