Simplify the following text for a Grade 11 native English-speaking person.
Original: The type of diabetes a patient has is determined only by the causeâ '' fundamentally by whether the patient is insulin resistant ( type 2 ) or insulin deficient without insulin resistance ( type 1 ) .
Simplified: Diabetes mellitus type 1 , also called type 1 diabetes is an autoimmune disease . People with this condition are insulin dependent-they require insulin injections without which they may die .