Says a 2007 version of the National Cancer Institute (NCI) Cancer Trends Progress Report, "as many as 50 to 75 percent of cancer deaths in the United States are caused by human behaviors such as smoking, physical inactivity, and poor dietary choices." Eat healthier. * Drink fat-free or low-fat milk. * Eat five or more servings of fruits and vegetables each day to decrease the risk of lung, esophageal, stomach, and colorectal cancers. * Choose whole grains instead of processed (refined) grains and sugars. * Limit consumption of processed meats (hot dogs, lunch meats) and eat poultry, fish, legumes, and nuts. 2.