What is a blood glucose test?

A blood glucose test is a blood test that screens for diabetes by measuring the level of glucose (sugar) in a person’s blood.

Who is most at risk for developing diabetes?

The following categories of people are considered "high-risk" candidates for developing diabetes:

  • Individuals who are obese
  • Individuals with first-degree relatives with diabetes (such as parents, children, or siblings)
  • Native Americans, Latinos, Asian-Americans, Pacific Islanders, African-Americans
  • Women who developed diabetes while they were pregnant or gave birth to large babies (9 pounds or more)
  • Individuals with high blood pressure (140/90 or higher)
  • Individuals with high-density lipoprotein (HDL, the "good cholesterol level") below 25 mg/dl or triglyceride levels at or above 250 mg/dl
  • Individuals who have impaired fasting glucose or impaired glucose tolerance
  • Individuals who are physically inactive; engaging in exercise less than three times a week

In addition to testing the above individuals at high risk, the American Diabetes Association also recommends screening all individuals age 45 and older.

Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy