Diet plays a very important role in our life, because for doing any kind of work we require energy which is provided by the diet we consume. Therefore, a healthy diet is fundamental to sustaining life, supporting vital body functions and maintaining a disease free body.

Diet Therapy is a method of eating prescribed by a doctor to improve health. A number of conditions are treated in part with therapeutic diets. Treatments involve including foods that improve specific health conditions, while avoiding foods that may make the condition worse. Some health conditions require temporary therapeutic diets, while some times a therapeutic diet may become a permanent change necessary to keep the person healthy. Medical doctors or dietitians normally formulate therapeutic diets. The diet may change over time based on the person's response and improvement in health status.

A gluten-free diet is an example of a dietary change that you must maintain to remain healthy. People with a gluten intolerance must avoid gluten-containing foods to prevent damage to their intestines. The diabetic diet is a very common therapeutic diet involving limiting high-sugar foods to help control blood sugar levels. Other therapeutic diets limit nutrients such as salt, to control blood pressure, or saturated fat, to manage cholesterol.

To maintain a healthy lifestyle, one should take a balanced diet, containing all types of Carbohydrates, Proteins, Vitamins and Mineral. Lack or excess of any of these may lead to severe health problems. Correct dietary combinations are also necessary in supporting the patient’s healing and recovery process.