What is Glycemic Index (GI)? The Glycemic Index (GI) tells us how quickly a food raises our blood sugar. Some foods raise it fast (high GI), and some raise it slowly (low GI). For people with diabetes, this matters because fast sugar spikes can be harmful. Why GI Matters in Diabetes Diabetics should eat mostly low GI foods because they help keep blood sugar stable and support weight loss. High...