Adults with diabetes type 1 or 2 have a target blood sugar level range of 4 to 7 mmol/L, before meals, states Diabetes.co.uk. About two hours after meals, the blood sugar level for adults with diabetes type 1 should be about 9 mmol/L, and 8.5 mmol/L for diabetes type 2.
Higher blood sugar levels than normal may indicate either diabetes or pre-diabetes is present, according to WebMD. The normal blood glucose level in humans is approximately 4 mmol/L or 72 mg/dL, states
Diabetes.co.uk. A normally operating body maintains blood sugar levels to a range of 4.4 to 6.1 mmol/L or 82 to 110 mg/dL. The blood sugar may slightly rise after meals to about 7.8 mmol/L or 140 mg/dL. However, in most healthy people, blood sugar levels may be even lower, reports WebMD.
During the day, blood glucose levels are often at their lowest just before meals. Similarly, a blood sugar level lower than 100 mg/dL is considered normal for a person who is fasting, states WebMD. Blood sugar levels usually never falls below 60 mg/dL, even with a long fasting period. This is because during fasting, the liver maintains normal blood sugar by converting fat and muscles into sugar. However, some people may have their blood sugar levels drop lower than the normal minimum.