Good hygiene creates an imbalance in the immune system

Scientists do not know what causes the immune system to attack insulin-producing pancreatic cells, so that they can no longer produce insulin. However, suspicions directed against excessively good hygiene, such as the immune system out of balance, because the clean environment does not create sufficient challenges. It can give a violent overreaction to a harmless infection, which ends with the attack might temporarily directed to the pancreas.

The theory is supported by the type 1 - diabetes is most prevalent in the Western world and the Arab Gulf States, where virtually all residents have access to clean drinking black and sanitation. However, before the disease is largely absent in Afghanistan, where only ten percent a population has the same benefits. Surveys suggest that genes play only a minor role.