Does eating fruit play a role in managing Fruits that have been processed such as What is fruit? · How much fruit should I eat? · Fruits for people with. While some forms of fruit, like juice, can be bad for diabetes, whole fruits like berries have to be smart about counting carbohydrates and tracking what you eat. Fruit does have a place in a healthy diabetes diet. Learn about the best fruits to eat, and why whole fruits are better than fruit juice.