I understand a few conditions may occur despite what you do. However, most are not. Our society is so used to eating fast, cheap, & easy. When you shop at the grocery store, limit your picking up ANYTHING in a box. You're not eating healthy just because you cook it at home. HamburgerHelper, CompleteMeals, boxed TacoDinners or pretty much anything from a box is crap you shouldn't eat. Shop the perimeter of the store for the majority of your food. Frozen veggies are great, too.