Type 1 diabetes is a condition where your body cannot make a hormone called insulin.
Insulin helps your body use glucose (sugar) for energy. Without insulin the level of glucose in your blood becomes too high.

If you have type 1 diabetes, you'll need to take insulin every day to manage your blood glucose levels.
Type 1 diabetes often starts in children and young adults, but it can happen at any age.

There's currently no cure for type 1 diabetes, but it can be managed by checking your blood glucose regularly, tracking what you eat and drink, and adjusting how much insulin you take.

It's not possible to prevent type 1 diabetes. It's caused by a problem with your immune system (autoimmune condition).

Type 1 diabetes is different from type 2 diabetes, which is more common in older people and people who are overweight.


https://www.nhs.uk/conditions/type-1-diabetes/