Olive oil and vinegar: prominent features of the Mediterranean diet
“The Mediterranean diet can be described as a dietary pattern characterized by the high consumption of plant-based foods, olive oil as the main source of fat, low-to-moderate consumption of fish, dairy products and poultry, low consumption of red and processed meat, and low-to-moderate consumption of wine with meals. The American Diabetes Association and the American Heart Association recommend Mediterranean diet for improving glycemic control and cardiovascular risk factors in type 2 diabetes. Prospective studies show that higher adherence to the Mediterranean diet is associated with a 20-23 % reduced risk of developing type 2 diabetes, while the results of randomized controlled trials show that Mediterranean diet reduces glycosylated hemoglobin levels by 0.30-0.47 %, and is also associated with a 28-30 % reduced risk for cardiovascular events.”
Source: Mediterranean diet for type 2 diabetes: cardiometabolic benefits. – PubMed – NCBI
Diabetic Mediterranean Diet 
The Great White Hope. Why do I think that there was not a low-carb arm in this study?
They didn’t even include a Low-Carb Mediterranean Diet arm! Shocking!