Food is an essential part of human existence. Eating is often perceived as an act designed only to "refuel" the body with energy, described often in terms of calories and vitamins. Unfortunately this mindset might be detrimental to our health. Instead we should begin viewing food also as a way to preserve and enhance our health! 

Let’s follow Hippocrates’ advice, "Let food be thy medicine, and let medicine be thy food!”

We eat to feed our bodies. We also eat to celebrate and socialize. But food can also be a disease fighting weapon. Scientific research highlights the powerful cancer-protective properties of many foods.  Research indicates that a healthy diet can be very beneficial for people diagnosed with cancer, or those seeking to prevent cancer. 30% of cancer is a result of poor dietary habits!  Many foods possess therapeutic properties similar to, or even better than, synthetic drugs. We can use these anticancer compounds that occur naturally in certain foods to prevent cancer as well as a complement to common cancer 
therapies 

Link to TED talk on nutrition

It is worthwhile mentioning an important report that came as a combined document from AICR ( American Institute of Cancer Research) and WCR (World Cancer Research). WCRF/AICR Expert Report, Food, Nutrition, Physical Activity and the Prevention of Cancer: a Global Perspective. This report discusses all the accumulated evidence that support current approach to nutrition and cancer. 
Link

2012    Nutrition and physical activity guidelines for cancer survivors 

Nutritionfacts.org- A website with extensive information on nutrition

 A video by  worthwhile watching on the value of Plant Based Diet and its effect on mortality

Dean Ornish Approach

HEALTHY FOOD PYRAMID