According to an article at Diabetes Care:
The Consensus Report highlights the role of weight management, dietary patterns, and technology-enabled tools in diabetes prevention and management. There is a clear consensus on reducing intake of added sugars, sodium, and unhealthy fats, especially trans fat, in the diet, although the panel does not recommend a “one-size-fits-all” eating plan. Instead, multiple eating patterns including the Mediterrranean diet, DASH (Dietary Approaches to Stop Hypertension) diet, and vegetarian and low-carbohydrate diets can be used for weight and diabetes management. However, the quality and food sources of the macronutrients are among the most critical factors determining the efficacy and long-term outcomes of these diets.
Source: Nutritional Strategies for Prevention and Management of Diabetes: Consensus and Uncertainties | Diabetes Care
I follow the well balanced ADA diet plan and have perfect after 41 years type1 diabetic.