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Fasting glucose shows current blood sugar; HbA1c reflects average control over 2–3 months. Both are used for diagnosis and monitoring type 2 diabetes.
Adults over 35, those with family history, obesity, PCOS, or gestational diabetes history should screen regularly. Your doctor sets personalised intervals.
Fasting glucose and comprehensive panels require 10–12 hours without food. HbA1c alone typically does not require fasting.
General reference ranges are below 5.7% for normal and 5.7–6.4% for prediabetes — your physician interprets results in context.