A Dietitian is a medical doctor who specializes in nutrition. It is important to note that it is a doctor, and not a personal trainer, teacher or psychologist. He deals with obesity issues, gives recommendations related to diet and healthy lifestyle.
The key activity of the nutritionist is the development of proper nutrition methods. Such systems will be useful not only for patients with obesity, anorexia or problems of the gastrointestinal tract. These systems are also important for healthy people, who realize that the right diet is the foundation for their future health problems.