The latest rave of diets is to avoid processed foods. Something scientists have been realizing is that our systems cannot handle the new ways we create food over the last century. Based on evolution, the human body spent thousands of years eating natural foods of lean meats, fruits, and vegetables. We cannot expect our bodies to completely adapt to our new food regimin so quickly.
Two popular dietary styles are the paleo diet (aka caveman diet) and the raw foods diet. Both diets avoid processed foods, which is simple when you ask yourself if you can recognize the plant or animal the food came from. The raw foods diet goes a step further by not heating foods above 115 degrees fahrenheit as the cooking process has been proven to destroy some of the nutrients found in the foods.