15. Drink milk
Apparently, calcium can guard against colon cancer. A recent study pointed out that people who consume more than 700 mg of calcium daily may reduce their colon risk by 45 percent compared to those who consume less than 500 mg.
And yeah, 700 mg of calcium may be a lot, but if you consume more dairy products daily, it can add up pretty fast. For example, a cup of low-fat yogurt can give you almost 350 mg of calcium, while a glass of low-fat milk offers about 300 mg.
Spinach is also a good source of calcium. One cup can give you almost 300 mg.