There are reasons I adapted the Mediterranean diet for folks with diabetes. the article linked below lists some of them.
“If there’s one so-called diet that is widely acclaimed for its health benefits, it’s the Mediterranean diet. In fact, U.S. News & World Report ranked the Mediterranean diet No. 1 on its 2019 41 Best Diets Overall list, citing a “host of health benefits, including weight loss, heart and brain health, cancer prevention, and diabetes prevention and control.” More of an eating pattern than a calorie-restricted diet, the Mediterranean regimen emphasizes eating lots of vegetables, fruits, nuts, legumes, seeds, and fish, with liberal use of olive oil, a moderate amount of dairy foods, and a low amount of red meat — a way of eating common in Mediterranean countries such as Spain, Italy, and Greece, noted an article published in June 2018 the journal Current Atherosclerosis Reports.”