When we eat veggies and fruits we can lose a few pounds as a side benefit. An article that I read in Newsweek where middle aged Americans have discovered that if they choose to eat a big salad vs. a couple of slices of pizza; has helped them not to grow a belly.
I have found that adding more salads to my daily regime gives me more energy and I tend to keep myself full and not get too hungry between meals. When I want to snack on something I eat a couple of tangerines or slices of cucumber. This gives me something to munch on; while not adding any extra pounds.
Give it a try.