Similar to glycemic index (GI), glycemic load (GL) is a measurement which ranks the impact of food carbohydrates on blood glucose levels.
However the key difference between GI and glycemic load is that glycemic load reflects a specific foods glycemic index and portion size.
In essence glycemic load takes into account both the quality and quality of the foods carbohydrates.
GL = GI / 100 x CHO* (grams) per serving CHO = carbohydrate content
For example: the glycemic load of a medium sized apple which has 15 grams of carbohydrate 40 /100 x 15 = 6