Type-1 diabetes is caused by substantial loss of pancreatic function and is considered irreversible.  These people have insulin deficiency and need to be on daily insulin injections. 

Slim people who have a partial insulin deficiency and blood sugars above 126 mg/dL are considered to have Type- 1 1/2  and may need insulin injections.

Type- 2 diabetics have insulin sufficiency meaning there is plenty of insulin.  This type of diabetes can be cured wi...