Blood sugar or glucose is the main sugar in your blood. It comes from the food you eat and is your body's main source of energy. Your blood carries glucose to every cell in your body to use as energy.
The blood sugar level or blood glucose level is the amount of glucose present in the blood of a human or animal. Blood sugar is a tightly regulated biochemical parameter in the blood. It is important for metabolic homeostasis.
High blood sugar can be a dangerous condition. It can cause many symptoms, including blurring vision, incredible thirst, and even weight loss.