I can't believe you said this. My ds (almost 10) has anxiety issues and lately has become extremely moody and we have tried to pay attention to what he was eating before some of his episodes and narrowed it down to when he eats someting sugar-y. He also has many allergies, so I think I'm going to call his allergist and ask about being allergic to something in the sugar. Was your ds tested specifically for white sugar? Thanks for posting this for the OP.