A dietitian or dietician (dietitian is the official spelling used within the dietetics profession) is an expert in food and nutrition. Dietitians help promote good health through proper eating. They supervise the preparation and service of food, develop modified diets, participate in research, and educate individuals and groups on good nutritional habits. In a medical setting, a dietitian may provide specific artificial nutritional needs to patients unable to consume food normally. Dietary mod… (More on Dietician)