Have you made the big change to go through your child's diet and cut out sugar?
I am heading towards that with DS, but I don't know how he will cope. At the moment his favourite food is biscuits, and I have never found a sugar free option. Admittedly he will eat fruit, but other than that his snack repertoire is very limited.
If you cook and aren't using sugar, what do you use to sweeten cakes, pikelets etc?