1) Engaged in this occupation 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 been trained by standard class hours of level-3 public dietitian, and obtained the certificate of completion.
4) College degree or above in medicine or food.
5) Have a college degree or above in non-medical or food specialty, and have been engaged in this occupation for more than 1 year.
6) Have a college degree or above in non-medical or food major, have received the standard hours of formal training of three-level public nutritionists, and have obtained the certificate of completion.