The significance of the glycemic index (GI) in nutrition lies in its ability to categorize foods based on their impact on blood sugar levels. Foods with a high GI cause rapid spikes in blood glucose, potentially promoting weight gain and increasing the risk of diabetes. Conversely, low-GI foods promote stable blood sugar levels and sustained energy, making them more suitable for health and weight management. Incorporating low-GI foods into the diet can support overall well-being and help prevent chronic health issues. Thus, understanding GI can inform better dietary choices.