Interesting that on Educating Yorkshire they did some investigation into a disruptive pupil who had previously been well behaved in Year 7 and below. He was assessed for autism And ADHD and other conditions
When they looked into many things including his diet and saw that his intake of sugar and caffeine had increased significantly from year 7 to year 8 it correlated with bad behaviour. when they dialled it back in they saw he returned to relevantly normal behaviour.
and people insist it’s nothing to do with sugar and diet