Between 72 mg/dL (3.8 to 4 mmol/L) and 108 mg/dL (5.8 to 6 mmol/L).
Blood sugar level (or blood sugar concentration) is the amount of glucose (a source of energy) present in your blood at any given time. A normal blood glucose level for a healthy person is somewhere between 72 mg/dL (3.8 to 4 mmol/L) and 108 mg/dL (5.8 to 6 mmol/L). It, of course, depends on every individual alone. 1 The doctor tests your blood sugar level after fasting for 8 hours and it’s higher than 126 mg/dL. 2  Oral glucose tolerance test. 3  After fasting for 8 hours, you get a special sugary drink. 4  Two hours later your sugar level is higher than 200. Adults. A normal blood sugar level is between 72 mg/dL and 108 mg/dL (4 to 6 mmol/L) for a healthy person. The concentration of glucose in the blood of a healthy person in the morning on an empty stomach is between 68 mg/dL and 108 mg/dL (3.8 and 6.0 mmol/L). 1 A fasting blood sugar level less than 100 mg/dL (5.6 mmol/L) is normal. 2  A fasting blood sugar level from 100 to 125 mg/dL (5.6 to 6.9 mmol/L) is considered prediabetes. 3  If it's 126 mg/dL (7 mmol/L) or higher on two separate tests, you have diabetes. 4  Oral glucose tolerance test. A. At present, the diagnosis of diabetes or prediabetes is based in an arbitrary cut-off point for a normal blood sugar level. A normal sugar level is currently considered to be less than 100 mg/dL when fasting and less than 140 mg/dL two hours after eating. But in most healthy people, sugar levels are even lower.
http://healthiack.com/health/what-is-normal-blood-sugar-level http://www.webmd.com/diabetes/how-sugar-affects-diabetes http://healthiack.com/health/what-is-normal-blood-sugar-level http://www.mayoclinic.org/diseases-conditions/diabetes/basics/tests-diagnosis/CON-20033091 http://answers.webmd.com/answers/1180327/what-blood-sugar-levels-are-considered-normal-and-what-levels-are-diabetic
What is considered normal Glucose level