What would happen if i substituted 2 of my 3 mealsa day, for a bowl of bran flakes (cereal)?

You most likely will lose weight if you keep this diet up. But even with the third meal being healthy, you still won't be getting enough vitamins and protein. That's at least my point of view. I would think that you would need to eat maybe yogurt for breakfast with a banana, and bran cereal for lunch and then a healthy protien filled meal for dinner.