Dr Peter Glidden discusses the 12 Bad Foods to avoid if you want optimum health. When you eliminate these foods you’ll find your digestive system begins to work more efficiently. This means you’ll be receiving more nutrition from your food. It’s the lack of nutrition which often causes weight gain as the body can go into patterns of binge eating in an attempt to receive enough nutrition. All chronic diseases are directly related to nutrient deficiencies, so it’s vital to ensure your digestive system is working at its best.