I recently received an interesting question (which I paraphrase below):

Nondiabetics' mean blood sugar level is around 83 mg/dl, whereas our teachers and the ADA recommend keeping it between 80 to 120 mg/dl. This is allowing patients to leave it >30% higher than where they could have been with better control.

Is this not the reason of having a lot of vascular and neurological complications?
Are the advisors giving loose and harmful advice?

Is there a way to have a real fact and clinical study to...