My two children (3 & 4) don't appear to have any allergic reactions to food, but their energy levels are sometimes very jittery - poor concentration, can't stay still for love nor money, manic jumping all over the place, even though we get lots of regular exercise and have a reasonable diet. I'm wondering two things - maybe there are more additives in their diet than I realise and I need to be even more careful, plus identify what might be a problem, but also I was reading a thread on here where someone said their children react to fruit acids and get jumpy, which made me think. Is there a reliable way to get a general intolerance test done?