Certified Diabetes Care and Education Specialist (CDCES) Practice Exam

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What is considered a normal fasting blood glucose level in a healthy adult?

70-99 mg/dL
100-125 mg/dL
126-140 mg/dL
141-180 mg/dL

The correct answer is: 70-99 mg/dL

A normal fasting blood glucose level in a healthy adult is indeed 70-99 mg/dL. This range is established by various health organizations, including the American Diabetes Association. Fasting blood glucose levels below 70 mg/dL may indicate hypoglycemia, while levels at or above 100 mg/dL can signal the beginning of insulin resistance or prediabetes. The values above this range represent progressively increasing degrees of potential glucose impairment. For example, a range of 100-125 mg/dL is classified as prediabetes, indicating a higher risk of developing type 2 diabetes in the future. Levels of 126 mg/dL and above are diagnostic criteria for diabetes, highlighting a clear distinction between normal and elevated blood glucose levels. Maintaining blood glucose within the normal range is crucial for overall health, as chronic hyperglycemia can lead to serious complications including cardiovascular disease, nerve damage, and kidney issues. Thus, recognizing the normal fasting blood glucose range is essential for individuals and healthcare providers to monitor and manage blood sugar effectively.