As long as it meets the requirements, self-study is also possible. You can consult the local vocational skill appraisal guidance center. The following information is for your reference: Public Nutritionist-Career Profile 1. 1 Career Name Public Nutritionist. 1.2 Occupation definition is a professional who is engaged in the evaluation and guidance of public dietary nutrition, the dissemination of nutrition and food knowledge, and the promotion of public health. 1.8.2 Application conditions-Level 4 public dietitian (with one of the following conditions) (1) engaged in this professional work 1 year or more. (2) Have a technical secondary school diploma in medicine or food. (3) After formal training of public dietitians in Level 4, they have reached the required standard class hours and obtained a certificate of completion. —— Class III public dietitian (meeting one of the following conditions) (1) has been engaged in this profession for more than 6 years. (2) Having been engaged in this occupation for more than 4 years after obtaining the professional qualification certificate of Grade 4 public dietitian. (3) After obtaining the professional qualification certificate of level 4 public dietitian, he has been engaged in the professional work for more than 3 years continuously, and has reached the required standard hours after being trained by level 3 public dietitian, and obtained the certificate of completion. (4) College degree or above in medicine or food-related major. (5) Have a college degree or above in non-medical or food majors, and have been engaged in this occupation for more than 1 year. (6) have a non-medical or food professional college degree or above, and have reached the required standard hours after training by a three-level nutritionist, and obtained a certificate of completion. —— Class II public dietitian (meeting one of the following conditions) (1) has been engaged in this profession for more than 3 years. (2) Having been engaged in this profession for more than 5 years after obtaining the professional qualification certificate of the third-class public dietitian. (3) After obtaining the professional qualification certificate of the third-level public dietitian, he has been engaged in this profession for more than 4 years continuously, and has reached the required standard hours after formal training by the second-level public dietitian, and has obtained the certificate of completion. (4) Have a bachelor's degree in medicine or food, and have been engaged in this occupation for more than 4 years after obtaining the professional qualification certificate of the third-class public dietitian. (5) Having a bachelor's degree in medicine or food, having obtained the professional qualification certificate of the third-class public dietitian, having been engaged in this profession for more than 3 years continuously, having been trained by the second-class public dietitian to reach the required standard hours, and having obtained the certificate of completion. (6) have a master's degree or above in medicine or food, and have been engaged in this occupation for more than 2 years. —— First-class public dietitian (meeting one of the following conditions) (1) has been engaged in this profession for more than 9 years1. (2) Having been engaged in this profession for more than 4 years after obtaining the professional qualification certificate of Class II public dietitian. (3) after obtaining the professional qualification certificate of the second-class public dietitian, he has been engaged in this profession for more than 3 years continuously, and has been formally trained by the first-class public dietitian to reach the prescribed standard hours, and has obtained the certificate of completion. During the probation period of the new occupation: (4) Have a bachelor's degree certificate in medicine or food, and have worked in this occupation or related occupations 13 years or more. (5) Have a master's degree or doctor's degree certificate in medicine or food, and have been engaged in this occupation or related occupations for more than 0/0 years.