Type I daibetes mellitus - The lack of production of Insulin
Pathology: The loss of beta cells in the Islet of Langerhaans of the pancreas, therefore no more Insulin can be secreted into the blood stream. Without insulin, blood glucose levels jump extremely fast as the body cannot translocate glucose across membranes fast enough
I would recommend talking to your doctor for answers specific to your body. For one person, this could be totally fine, but it may cause complications for you.