Type 1 diabetes is caused by the immune system destroying the cells in the pancreas that make insulin. This causes diabetes by leaving the body without enough insulin to function normally.
This is called an autoimmune reaction, or autoimmune cause, because the body is attacking itself.
There is no specific diabetes causes, but the following triggers may be involved:
Viral or bacterial infection
Chemical toxins within food
Unidentified component causing autoimmune reaction
Underlying genetic disposition may also be a type 1 diabetes cause