Registered dietitians, namely nutrition hygienists, are jointly trained by the National Talent Flow Center of the Ministry of Personnel and the Mental Health Committee of china health care association. The issuing authority is the national talent flow center, and the certificate issued is a nutrition hygienist.

On-the-job nutritionist refers to a nutrition professional who can guide people in the fields of diet, disease prevention, adjuvant therapy, sub-health prevention and health management. And can design a good plan and follow-up service after passing strict basic nutrition theory study and professional clinical nutrition skills training and examination. In the legislation of nutritionist law, obtaining qualification certificate will be regarded as a qualified post.

The emergence of dietitian profession is to meet the needs of social health. Nutritionist is a comprehensive profession, which combines the characteristics of chefs, health care professionals, medical practitioners, Chinese medicine practitioners, psychologists, catering practitioners and managers. They are not only experts in food, but also experts in the fields of nutrition detection, nutrition fortification, nutrition evaluation, etc., helping people to prevent diseases and recuperate their bodies, so as to obtain health.