The Glycemic Index is a ranking system that rates foods on a scale of 0-100 on how much the food causes a rapid rise in your blood sugar levels.

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A food with a low Glycemic Index is healthier, since it does not cause a sudden spike in your blood sugar levels. A food with a low Glycemic Index will cause a gradual, sustained rise in your blood sugar levels after the meal, helping you to function well until your next meal.

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On the other hand, a food with a high Glycemic Index is not as healthy for you, as it will cause a sudden spike in your blood sugar level after the meal, and can cause you to have a short, sudden burst of energy, followed by you feeling very lethargic and sluggish after your Insulin levels peak and your blood sugar level falls again.

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Always try to pick foods with a low Glycemic Index, since this will help you to maintain a healthy weight, avoid post-meal energy surges and crashes, and avoid developing Insulin Resistance, and Diabetes. (Give our article on Diabetes a read to learn more about Insulin Resistance and Diabetes).

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