The study of relationship between health and nutrition is called dietetics. A dietitian applies his/her knowledge about nutrition and health by prescribing proper diet and healthy eating habit to people. A dietitian can only prescribe the right diet for people affected by certain medical conditions. This field of medical science has various applications such as clinical treatment, community outreach and research.

A registered dietitian can only translate the science of nutrition to people. The main aim of dietetics is to prevent the society from nutrition related issues. Dietetics stands for the well-being of individuals and communities in the society. A dietitian will be able to find the responses of the body to different types of food that one consume. A dietitian will also be able to treat people with eating disorders, psychological disorders, and cancers. A healthy diet is necessary for a healthy life. Dietetics and dietitians have become the need-of-the hour, due to modern lifestyle changes.