Learn how to read labels. Avoid foods that are processed or that contain trans fats, added sugars (such as high-fructose corn syrup), coloring, preservatives, fillers, stabilizers and chemical additives.
Try to shop in the health food section of your supermarket—but even here, remember to read the label! The label for cottage cheese, for example, should contain nothing more than cultured pasteurized Grade A milk, cream and salt.
Also look for brands that are made from the milk of cows that have not been given hormones or antibiotics.