What fasting blood glucose level indicates hyperglycemia?

Hyperglycemia is defined as having an elevated level of glucose in the blood. For fasting blood glucose levels, a level of 126 mg/dL or higher is the standard criterion used to diagnose diabetes, as established by organizations such as the American Diabetes Association. This threshold indicates that the body's regulation of glucose is impaired, which is indicative of hyperglycemia.

In the context of other fasting blood glucose levels, a level less than 100 mg/dL is considered normal, while a level between 100 and 125 mg/dL is categorized as impaired fasting glucose, which is a warning sign but not yet diagnosed as diabetes. Therefore, a fasting blood glucose level of 126 mg/dL or higher distinctly indicates hyperglycemia and is a critical marker for diagnosing and managing diabetes.