Something in your digestive tract is causing a problem. It may be temporary, or it may be permanent, but either way it means restricting what you eat. The best thing to do is to accept the fact that you need to follow a special diet. Special diets are designed for people who discover that what they are eating is undermining their health. You may find out that you suffer from allergies to food, or have diabetes or high cholesterol. Proper nutrition is an important part of health; it’s also an important part of managing illness, and it’s a tool to use in the fight against disease. When faced with a diagnosis that involves a carefully controlled diet, it’s important to remember that proper nutrition, calorie intake, and appealing and appetizing foods do go together. Because of nutrition’s recognized role in health care, many people now consult a registered dietitian to create an eating plan that provides the energy and nutrients needed to maintain or improve health. This chapter addresses some of the most common special dietary needs. Many such conditions require oversight or a diagnosis from a health care provider. The information in this chapter is not intended to be a substitute for that; it is intended only to supplement information from a doctor or a qualified nutrition professional.