Normal values of Blood Glucose in Human Body

Many factors affect a person's blood sugar level. A body's homeostatic mechanism, when operating normally, restores the blood sugar level to a narrow range of about 82 to 110 mg/dL (4.4 to 6.1 mmol/L).

Despite widely variable intervals between meals or the occasional consumption of meals with a substantial carbohydrate load, human blood glucose levels normally remain within the normal range. However, shortly after eating the blood glucose level may rise temporarily up to 140 mg/dL (7.8 mmol/L) or a bit more in non-diabetics. The American Diabetes Association recommends a post-meal glucose level less than 180 mg/dl (10 mmol/L) and a pre-meal plasma glucose of 90–130 mg/dL (5 to 7.2 mmol/L).