MH -- advice for six year old please

I want to help a six year old get rid of a very large tummy (from years of eating wrong -- she's my foster/adopted child). I promised her I would help her this summer, so clothes can fit her properly. Her waist measures 27". I'm thinking she is full of lots of old foods that are stuck in the intestines. I've had her for one year and we eat healthy, no sweets or starches, except what she gets at school. She eats probably 45% raw. I would of thought in one year we would of seen some improvements, well actually, her waist did get down to 25", but is is back up to 27".

I desperately want to help her -- please help me figure out how. I'm thinking this summer all raw is the way to go -- if I can -- SAD husband makes that hard. But is there any thing you can think of about getting the system cleaned out. I've questioned before and all seem to think she just needs lots of love. If love were the answer, she would be skin and bones!

Advice please!! Thanks!