Hi my dad aged 57 is recently diagnosed with diabtetes he is not overweight. he does hard work daily but i donot understand why he got diabetes?

Diabetes: Most cases of type 1 diabetes are associated with having a genetic disposition for the disease from both parents. For people with a family history of type 1 diabetes, autoimmune disorders and viral infections can trigger the disease. Heredity may also play a factor in causing type 2 diabetes, a stronger link than type 1 for people living in the U.S., according to the american diabetes association.

Genetics: Most diabetes is inherited. The genetics may be slightly or greatly prominent , so the age of onset and severity will vary accordingly. Diet, aerobic fitness, and % body fat also influence the age and severity. If habits are unhealthy, dm shows up sooner.