![](https://www.diabetesnews.com/wp-content/uploads/2014/03/diabetes_mellitus_-_insulin_treatment-2-150x150.jpg)
Different types of insulin are used to manage type 1 diabetes with insulin injections. Long-acting insulin takes about one hour to begin lowering blood sugar levels and lasts up to 26 hours, while intermediate-acting insulin takes one to three hours to begin lowering blood sugar levels and lasts up to 16 hours.