A friend writes that she limits the sugar intake of her two kids because they get very wired when they eat it. They are both falling behind in school because of inability to stay focused.  Her ex has visitation every weekend and gives the children chocolate and soda. He says their behavior and short attention span is unrelated to sugar, despite studies that show some ADHD kids are “turned on” by sweet stuff.  She’s experimented and has seen that they focus better without sugar and processed foods. He won’t listen. She is open to suggestions.