Which fasting blood glucose range indicates prediabetes?

Which fasting blood glucose range indicates prediabetes?

• A. 70-99 mg/dL
• B. 100-125 mg/dL (impaired fasting glucose)
• C. 126-139 mg/dL
• D. 140-199 mg/dL

Answer: (B)

Prediabetes is identified by a fasting blood glucose level that’s elevated above normal but not high enough to be diabetes. The range 100–125 mg/dL is specifically labeled impaired fasting glucose, which is the category for prediabetes. It signals increased risk for developing type 2 diabetes and cardiovascular issues, and it’s a window for lifestyle changes to prevent progression. Normal fasting glucose is below 100 mg/dL, so 70–99 mg/dL fits that normal range. Values 126 mg/dL or higher meet the typical criteria for diabetes (usually confirmed with a second test or supported by additional tests like HbA1c or an oral glucose tolerance test). The ranges 126–139 and 140–199 mg/dL lie in the diabetes territory, not prediabetes, so they indicate hyperglycemia consistent with diabetes rather than impaired fasting glucose.

Prediabetes is identified by a fasting blood glucose level that’s elevated above normal but not high enough to be diabetes. The range 100–125 mg/dL is specifically labeled impaired fasting glucose, which is the category for prediabetes. It signals increased risk for developing type 2 diabetes and cardiovascular issues, and it’s a window for lifestyle changes to prevent progression.

Normal fasting glucose is below 100 mg/dL, so 70–99 mg/dL fits that normal range. Values 126 mg/dL or higher meet the typical criteria for diabetes (usually confirmed with a second test or supported by additional tests like HbA1c or an oral glucose tolerance test). The ranges 126–139 and 140–199 mg/dL lie in the diabetes territory, not prediabetes, so they indicate hyperglycemia consistent with diabetes rather than impaired fasting glucose.