Weekly email tips: A1C vs. Time-in-Range: Which One Matters Day-to-Day?


What to track weekly and how to talk to your doctor. Hello Reader, For years, doctors have used A1C as the “gold standard” for diabetes care. It’s helpful — but it only shows your average blood sugar over 2–3 months. That means two people with very different daily swings could have the same A1C. That’s why more experts are focusing on Time-in-Range (TIR). This is the percentage of time your glucose stays in the healthy zone (70–180 mg/dL). Unlike A1C, it shows what’s happening day to day. 📌...