Here are two rules to live by when purchasing, eating and making food:
Great Grandmother Rule: If you showed this food to your great grandmother, would she know what it is? If you showed her a sweet potato she would most likely know what it is and how to cook it. If you showed her a deep fried Twinkie she would most likely ask you what it was and would not know how to make it.
Kitchen Counter Rule: When you purchase food ask yourself, “Could I reproduce this in my home/on my kitchen counter?” Say you are purchasing crackers – some have ingredients you have never heard of and don’t have in your kitchen, while others consistent of all ingredients you have heard of and could have in your kitchen. Purchase the ones you could make in your kitchen.