The glycemic index (GI) is a ranking of carbohydrate-containing foods based on their impact on blood sugar levels. Foods with a high GI cause rapid spikes in blood sugar, while those with a low GI result in slower, steadier increases. Understanding the GI can help individuals make informed dietary choices that promote better blood sugar control, energy levels, and weight management. Incorporating low-GI foods into one’s diet aids in preventing energy crashes, supporting overall health, and optimizing exercise performance.