It is a chart that measures how quickly certain foods raise blood sugar levels. The glycemic index or GI ranks foods on a scale from zero to 100 based on how fast foods cause a spike in blood sugar levels after consumption. 

High-GI foods, like sugary snacks and white bread, provide a quick energy boost but lead to a rapid drop in energy. Low GI foods, such as whole grains, fruits, and vegetables, release sugar more slowly, offering a steady and lasting energy source. 

Choosing more low-GI foods helps maintain stable energy levels and can be beneficial for overall health, especially for conditions like diabetes. 

By referencing the GI chart, diabetic patients can create a balanced and sustainable diet, incorporating foods that have a minimal impact on blood sugar and further reducing the risk of complications associated with diabetes.

The glycemic index (GI) has its own limitations too which is also another reason why the chart cannot be the only thing guiding your diet plan. The GI chart doesn`t account for the quantity of carbohydrates consumed or the overall nutritional content of the food.  Therefore, while the GI is a valuable tool for managing blood sugar, it`s advisable to consider it alongside other aspects of a balanced diet. 

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