Every machine or engine needs some sort of fuel and for our body and mind sugar acts as the fuel. We need sugar in our blood for staying active and healthy. Our every activity makes us spend some amount of energy. Our mind is always active, except the time when we are sleeping but even then our mind controls the body functions and makes us dream. The brain requires sugar all the time for producing energy with the help of oxygen. Blood is the carrier of sugar or glucose and if tested at any point of time some amount of sugar will be found in our blood.
