The work of a dietitian is very important. They promote people's health by scientifically and reasonably distributing people's diet, reduce the occurrence of various chronic diseases, and improve the nutritional awareness of the whole people by popularizing nutritional knowledge to the whole society, so as to achieve the purpose of enhancing the physical fitness of the whole people.

Nutritionists are also divided into clinical nutritionists, public nutritionists, food nutritionists, sports nutritionists and catering nutritionists because of their combination with different objects.

Clinical nutritionist: Mainly engaged in nutrition related to diseases, making reasonable meals for patients and designing recipes suitable for different patients. She mainly works in a hospital and is often called a nutritionist. Most of these nutritionists graduated from the preventive medicine department of medical college/university.

Therefore, nutritionist, a new profession, has matured in response to social needs. The official establishment of this profession by the state will play a positive role in standardizing the professional behavior of this profession, improving the professional ability of practitioners and building a team of nutrition professionals in China.

Broadly speaking, it refers to professionals engaged in nutrition work, who not only have rich nutrition professional knowledge, but also have certain nutrition-related work experience and accumulated certain experience, and have rich professional qualifications in this industry.