Insulin resistance is caused by obesity and a family history of insulin resistance. You can develop insulin resistance without these, but it's rare. Insulin resistance leads to type 2 diabetes. A type 1 diabetic can develop insulin resistance the same way anyone else does, but becoming obese and by having insulin resistance in the family. In this case, the insulin resistance and the type 1 diabetes are totally unrelated.

Diabetes Mellitus

Genetic factors contributing to insulin resistance cannot be changed as of the early 2000s.

In its mildest form, insulin resistance causes no symptoms, and is only recognizable on laboratory tests.

High blood sugar from food stimulates the pancreas to secrete insulin into the blood. However, in insulin resistance, the insulin is secreted but is only partially absorbed by the tissues.