Balance is key. The body needs all the food groups. I try to get them all in for lunch and dinner. Grain, protein, fruit, and vegetable. The grain is best if it's whole wheat, no enriched flour. No need to deprive of any one thing, just eat all in moderation.
Make sure to eat lots of fiber (you can look up breads and other foods with fiber). Also get lots of water in (I drink about 10 glasses a say and it really helps).
Red