What are they?
A report in the journal Diabetes Care explains how, ounce for ounce, these foods tend to contain more calories and have been associated with weight gain and elevated blood sugar.
They include highly processed food, fatty foods, meats and calori- laden soft drinks.
In a 12-year study, researchers say those people who consumed the most energy dense diets had a 60-percent higher risk for developing diabetes.
Participants with diets rich in low-energy dense foods, such as fruits and vegetables, were much less likely to develop the disease.