It is a source of energy for the cells and an intermediary in the body metabolism. It is used as easily digestible nutrient for the organism. Glucose is one of the most important sources of energy for all human cells, such as 1 g of glucose is equal to 4 kilocalories. When absorbed in our body, glucose synthesizes ATP - the universal molecule energy carrier in the cells. Glucose is extremely important in the production of proteins and muscle tissue of the body, as well as in the production of reserve fats.