A dietitian may also go by “registered dietitian nutritionist” or RDN. In short, nutritionist refers to a broader category of professionals that help people eat healthy, whereas dietitians are nutritionists with specialized training. All dietitians are nutritionists, but not all nutritionists are dietitians.

From common gastrointestinal-related ailments like constipation, diarrhea, bloating, gas and heartburn, to more serious issues like celiac disease or Crohn's disease, an RD can suggest dietary changes that can help to pinpoint triggering foods and manage symptoms of your condition.

Dietitians and nutritionists counsel clients on nutrition issues and healthy eating habits. Dietitians and nutritionists are experts in the use of food and nutrition to promote health and manage disease. They plan and conduct food service or nutritional programs to help people lead healthy lives.

Bachelor of Science in Nutrition and Dietetics is an undergraduate full-time course in nutrition and dietetics. The course is generally of 3-years duration.