Nutritionist is a profession that combines many professional characteristics such as chef, medical staff, medical practitioners, traditional Chinese medicine, psychologists, marketers and administrators. Nutritionists can promote people's health and reduce the occurrence of various chronic diseases by scientifically and reasonably distributing people's diets, and improve people's nutrition awareness by popularizing nutrition knowledge to the whole society.

Nutritionists can be divided into clinical nutritionists, public nutritionists, food nutritionists, sports nutritionists and catering nutritionists according to their different functions.