Diabetes mellitus is a syndrome of chronic hyperglycaemia due to relative insulin deficiency, resistance or both. It is a challenging disease to manage successfully, its treatment aims on achieving adequate control of glucose levels in the blood and to properly manage it, there is need for patients to adhere to the recommended diet. Failure in the management of the disease results in many complications which are the cause of mortality worldwide. The main objective of this study was to determine the prevalence of adhering to recommended diet among diabetic patients at Matero level one hospital Lusaka, Zambia.