The dysfunction of the cells that produce the hormone insulin in the human body causes [[1]].

The dysfunction of the cells that produce the hormone insulin in the human body causes diabetes.

The beta cells in the islets of Langerhans in the pancreas produce the hormone insulin. Insulin controls blood sugar levels in the blood. When the beta cells stop or produce less insulin, the blood sugar levels increase in the blood causing the disease. 

Diabetes is a chronic non-infectious disease.