Blood sugar is a term used to refer to the amount of
glucose in the
blood. Glucose, transported via the bloodstream, is the primary source of energy for the body's cells. Blood sugar concentration, or glucose level, is tightly
regulated in the human body. Normally, the blood glucose level is maintained between about 4 and 8 mmol/L (70 to 150 mg/dL). The total amount of glucose in the circulating blood is therefore about 3.3 to 7g (assuming an ordinary adult blood volume of 5 liters). Glucose levels rise after meals and are usually lowest in the morning, before the first meal of the day.
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the main sugar found in the blood and the body's main source of energy. Also called blood sugar.
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