My question is about whether labs have different reference values because of the reagents used in processing. My lab report shows an A1C value of 6, and the lab normal range shows up to 6.2. I understand that normal values are usually less than 5.7, but in this case, can 6 be considered normal since the lab range shows up to 6.2? I understand fasting is high, but please restrict your answer to differences in lab normal ranges.

Question

Dr. Dhankecha Mayank · Accepted Answer

Lab normal ranges can slightly vary, but medically, A1C of 6 is considered prediabetic. Even if your lab marks it as normal, aim to bring it below 5.7 with lifestyle changes. Repeat every 3 to 6 months and consult if it trends higher.

Lab normal ranges can slightly vary, but medically, A1C of 6 is considered prediabetic. Even if your lab marks it as normal, aim to bring it below 5.7 with lifestyle changes. Repeat every 3 to 6 months and consult if it trends higher.

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My father does not have diabetes. However, today his fasting glucose was 121 mg/dL, and his postprandial blood sugar (PPBS) was 88 mg/dL. Is this a concern? Why is the PPBS lower than the fasting glucose? How should we proceed? His HbA1c is 6.2 percent