1. Clinic nutritionist: Usually working in a hospital, a community fitness center or a health care institution, responsible for diagnosing the nutritional problems of patients, listing health care plans, and supervising the effectiveness of dietary changes.

2. Dietitians in catering service management: Nutritionists join the catering service management industry, so that no matter three meals a day or snacks, they can be prepared and delivered safely, hygienically and cost-effectively.

3. Nutrition consultant: provides experts' advice on nutrition, dietotherapy and catering services for individuals, institutions and business organizations. Such nutritionists generally work in professional consulting institutions.

4. Public health nutritionist: working in the public health care field and social service department, responsible for understanding the nutritional needs of the public, confirming the nutritional problems in the community, proposing nutrition education projects and health promotion strategies, and providing information and consulting services to other public departments, experts and the public.

5. nutritionists in the business field: they mostly serve food and pharmaceutical companies, market associations and catering service providers. Nutritionists assist business leaders in research, give expert opinions on management and market, and urge enterprises to produce better food and nutritional products and put them on the market.

6. Research nutritionist: Usually working in universities, health care institutions and enterprises, responsible for making plans and implementing research projects. These projects can fundamentally improve the level of medical care and save the cost of catering services.