He needs to have a balanced diet. Go by the glycemic index, if the carbohydrate content is more in any food then avoid it or have it in minimal amounts. Otherwise follow the normal guidelines of Low Fat, Low Sugar, Low Salt, Plenty of Fruit and Vegetables, and Plenty of Complex Carbohydrates.There are NO foods which must be completely excluded from diabetic diet. It is also NOT necessary to avoid sugar competely. It IS necessary to follow the advice of your medical team and follow a diet that achieves a healthy weight.