A well balanced diet will keep anyone healthy. The best foods
for him are the same foods that are good
for you. However, lower
carb foods can help prevent highs.
What a diabetic needs to understand about food is that to accurately count the carbohydrates in the food is essential. If you need help figuring out carbs, Calorie King has an excellent book which lists carbs for most foods and restaurants.
http://www.calorieking.