Hello and welcome to the forum. Thanks for your question although we are sorry you have a family member recently diagnosed with type 1 diabetes. Please know that this can be managed. Your loved one should work with their doctor closely and perhaps a diabetes nurse educator that the doctor recommends. Here is some helpful information on managing type one diabetes. https://www.mayoclinic.org/diseases-conditions/type-1-diabetes/diagnosis-treatment/drc-20353017
Treatment typically involves:
Carbohydrate, fat and protein counting
Frequent blood sugar monitoring
Eating healthy foods
Exercising regularly and maintaining a healthy weight
While it is a chronic and life long condition, managing diabetes type 1 becomes part of someone's life and they can lead a long, productive life when they are careful with their disease. Best to you and your loved one.
With excellent management her life expectancy should be just about the same as a person without type 1 diabetes. However, she will need to be careful with diet and work to maintain her blood sugars as close to non-diabetic levels as possible. Some people with type 1 diabetes find that a very low carb diet is very helpful for normalizing sugar levels, along with insulin dosing, of course. I have had diabetes for 11 years now and using insulin for 11 years... my a1c is usually 5.0 - 5.2. I eat very low carb. I have no detectable diabetes complications.
I agree that type one diabetes is manageable. Does your loved one work with anyone in the office like a nurse to help get stabilized and used to checking levels and things like that?