There is good evidence that the Mediterranean diet, rich in vegetables, fruits, whole grains, beans, nuts, and lean proteins and low in simple sugars, processed foods, and red meats, helps improve the components of metabolic syndrome. In people who struggle with obesity, calorie restriction may also be necessary, along with a comprehensive diet plan.There is good evidence that the Mediterranean diet, rich in vegetables, fruits, whole grains, beans, nuts, and lean proteins and low in simple sugars, processed foods, and red meats, helps improve the components of metabolic syndrome. In people who struggle with obesity, calorie restriction may also be necessary, along with a comprehensive diet plan.