what is the cause of diabetes

Type 1 and type 2 diabetes ¡ª The exact causes of both types of diabetes are still not known. Type 1 diabetes tends to show up after a person is exposed to a trigger, such as a virus, which can start an attack on the cells in the pancreas that make insulin. There is no one cause for type 2 diabetes, but it seems to run in families, and most people who get type 2 diabetes are overweight.

Gestational diabetes ¡ª Changing hormones and weight gain are part of a healthy pregnancy, but these changes make it hard for your body to keep up with its need for insulin. When that happens, your body doesn't get the energy it needs from the foods you eat.