What is the best diet for improving long-term glycemic control in a patient with type 2 diabetes?
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A low-calorie diet resulting in maintenance of weight loss has been shown to reduce HbA1c for up to 4 years in overweight or obese patients with type 2 diabetes. (SOR: B, based on a single RCT.) Over a similar time frame, a low-calorie Mediterranean-style diet (low carbohydrate, high monounsaturated fat) reduces the need for medication compared with a caloric restriction diet relatively higher in carbohydrate and lower in fat. (SOR: B, based on a single RCT.)
Evidence Based Practice 15(4): 08.