1. Nutrition major in universities or vocational schools: These schools provide basic nutrition, clinical nutrition, food science and other related courses, including professional nutritionist training.

2. Nutritionist training institutions: These institutions provide professional nutritionist training courses, covering theoretical knowledge, practical skills and other aspects. For example, Luyou Education, Global Online School and Shangyuan Education are all professional institutions that provide nutritionist training.

3. Online courses and learning platforms: There are many online courses and learning platforms that provide nutritionist-related courses, which are flexible and convenient and suitable for autonomous learning.

4. Nutritionists in hospitals or clinics: Some hospitals or clinics will also recruit nutritionists to provide nutritional consultation and treatment for patients. Working in these places can gain rich practical experience and medical knowledge.

5. Internship and work experience: Looking for internship opportunities or work experience related to nutritionists can not only improve their skills, but also establish a professional network.

6. Self-study and continuing education: A dietitian is a profession that needs constant learning and renewal. Self-study and continuing education can be carried out by reading professional books, attending seminars or workshops.