From the early stage of diabetes diagnosis, it may necessary to modify lifestyle including nutrition and physical activity. Self-management instruction and support can result in healthy eating habits for effective blood sugar management. Clinical nutritionists must conduct accurate nutritional assessments for successful dietary change and patient health. They must also diagnose and prioritize the nutritional problems to be addressed. Through medical nutrition therapy, nutritionists must instruct and encourage patient self-management skills based on evidence-based nutritional guidelines and education about viable strategies. For this purpose, educators should strive continuously to acquire knowledge and professional training.