What’s the difference between HbA1c and the oral glucose tolerance test (OGTT)?

The HbA1c test measures your average blood sugar levels over the past 2-3 months, while the oral glucose tolerance test (OGTT) measures how your body processes glucose over a few hours after drinking a sugary solution. The OGTT is often used to diagnose gestational diabetes or prediabetes. HbA1c is more commonly used for long-term diabetes management, as it provides a clearer picture of blood sugar control over time. Both tests serve different purposes, and your doctor will decide which test is appropriate based on your specific health needs.