my mom is a diabetic and she is required by her docs to eat foods rich in sugar sparingly. her diet consists of mostly starches like bread and cereal. she also needs to eat lots of veggies to help regulate her blood sugar.
some diabetics have stricter diet but my mom's is more flexible but she always adheres to it :)
Most diabetics are required by their physician to go on a diet. This type is typically low in sugar. However, sugar is also a good source of energy so doctors will only want to minimize intake and not stop it all together.