Simple carbohydrates (sugar, white bread, potatoes, rice, etc) tend to increase
glucose levels quickly, causing the pancreas to produce more insulin. Over a period of time, body cells can become less sensitive to the insulin, which means we have to produce more in order to reduce the glucose levels.
Exercise and diet will go a long way toward avoiding full blown Diabetes.
Type 1 Diabetes is an autoimmune condition, which can’t be avoided or cured.