Page 95 - General Biochemistry

• Low GI carbs prolong physical endurance

• High GI carbs help re-fuel carbohydrate stores after exercise.

Glycemic load

• Glycemic Index alone does not provide enough information about the glycemic

affect of a food.

• For instance a carrot is high on GI, but you would have to eat pounds of this

vegetable to have any effect on blood glucose. This is due to that the amount of
carbs in a carrot is very small.

• To calculate glycemic load - multiply the GI by the amount of carbohydrate and

divide by 100.

• For example:

an 100g serve of carrot with a GI of 92 has 4.2 g per serve.
92 x 4.2 / 100 = 3.9

an 100g serve of water melon with a GI of 72 has 5,6 g per serve.
72 x 5,6/100 = GL = 4

Foods with a low GI usually have a low GL.

Low GL = 10 or less
Medium GI = 11-19
High GI = 20 or more

Objectives:
By the end of this chapter, students should Analyze and interpret the

biochemical data obtained in the practical sessions

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