During fasting, glycogen is broken down and converted into glucose
. This glycogen conversion into glucose
is important in maintaining the blood glucose level
. Therefore, during fasting, maintenance of the blood glucose level depends more on glycogen conversion than on sugars we eat. In severe liver disease, this mechanism can be disrupted, leading to hypoglycemia. Kidney failure also can lead to hypoglycemia, especially when the person is deprived of food.