Researchers have found that the levels fell by a small, but significant, amount in children with type I diabetes. In a review of 29 trials, which involved 543 children, researchers discovered that children saw their glycaemic levels fall by an average of 0.5 per cent when they had some form of psychological therapy, such as counselling, cognitive behaviour therapy, and psychodynamic therapy.

Interestingly, the therapies had absolutely no effect on adults who were also tested.

(Source: British Medical Journal, 2006; 333: 65-8).