2026 Glucose Management Complete Practice Test

A1C reflects the average blood glucose over roughly three months, capturing both fasting periods and after-meal (postprandial) glucose. When A1C is near the goal, fasting glucose is often close to target, so the remaining elevation is usually driven by postprandial spikes. Reducing those post-meal rises can therefore move the A1C further toward goal. This is why postprandial glucose contributes significantly to A1C, whereas fasting glucose also matters; the influence is not limited to type 2 diabetes, and A1C is not independent of postprandial glucose.