It is the situation where is the blood glucose levels turns higher but not high enough to be called a diabetes. If you have pre-diabetes, you are at a 50 percent increased risk for heart disease or stroke.
Doctors generally say if you are 45 or older and overweight, you must go fro pre-diabetes test. If you’re normal weight and over 45, ask your doctor if testing is appropriate. For adults younger than 45 and overweight, your doctor may suggest testing if you have other risk factors, including high blood pressure, family history of diabetes. Your chance to get diabetes is higher if you belong to any communities like African-American, Latino, Asian-American, Native American or Pacific Islanders.
Doctors can use two different blood tests to find out your blood glucose level, which determines if you have a normal metabolism or if you are pre-diabetic or diabetic. The fasting plasma glucose test (more commonly used) requires a person to fast overnight and the blood glucose is measured first thing in the morning before eating.
For the oral glucose tolerance test, a person’s glucose is checked after fasting overnight and two hours after drinking a glucose-rich drink. This test measures how high glucose goes and how long it takes to go back down (two hours is normal).
For the fasting plasma glucose testing, a normal level is below 100 miligrams/deciliter; pre-diabetes level is between 100 mg/dl and 125 mg/dl; diabetes level is 126 mg/dl or greater.For the oral glucose tolerance test, a normal level is below 140 mg/dl; pre-diabetes level is 140 mg/dl to 199 mg/dl; diabetes level is 200 mg/dl or greater.
Source: Health & Fitness