The last couple of checkups showed elevated levels, though, and after some other tests, I was diagnosed as having Type 2 diabetes mellitus. Type 1 diabetes is when the pancreas is unable to produce and release insulin. More common is Type 2 diabetes; this occurs when the pancreas can still produce and release insulin, but can’t keep up with the demand, so blood glucose levels remain elevated. Type 2 diabetes used to be known as “adult-onset” diabetes because it was seen mainly in adults, but now it is prevalent in children, as well. Here’s the connection between Type 2 diabetes and weight: As fat cells increase in size, they tend to become less sensitive to insulin.