Type 2 diabetes mellitus (T2DM) is regarded as one of the most widespread illnesses on a global scale. Complex risk variables, including age,genetics,race,and ethnicity, as well as modifiable risk factors,including dietary habits, physical activity levels, and smoking,are linked to the aetiology of T2DM. This review's goals are to look at diverse research to study how T2DM and various dietary patterns, practices, and behaviors relate to one another, as well as the difficulties that can result. The main causes of the rapidly increasing incidence of diabetes mellitus in emerging countries are dietary practices and a sedentary lifestyle. Recent studies have linked raised HbA1c levels in type 2 diabetics to a higher risk of microvascular and macrovascular problems. Dietary control is one way to reduce the increased HbA1c level; Thus, the patients' development of diabetes problems might be stopped. Better nutritional knowledge, attitudes, and habits are brought about by increased awareness of the problems of diabetes. Patients should be encouraged to appreciate the significance of nutrition, which may aid in disease management,adequate self-care, and higher quality of life,by the stakeholders (healthcare providers,health facilities,agencies involved in diabetes care,etc.). Keywords:Type 2 diabetes mellitus, Diet, Complications,Knowledge,Practices