Your body uses nutrients from your favorite food by breaking it down during digestion and absorbing the useful parts like vitamins, minerals, carbohydrates, proteins, and fats to give you energy and help your body grow and repair itself.The digestive system is the one responsible for this process. It includes parts like the mouth, stomach, and intestines. After breaking down the food, the small intestine absorbs the nutrients and sends them into the bloodstream, so the rest of your body can use them.