© by AlishaV

Glucose (also known as blood sugar), which is a monosaccharide that can be found in foods but not eaten directly, provides almost all the energy in the human brain and it is the body’s preferential source of energy during exercise.  The body takes carbohydrates, breaks them down, derives glucose, and converts it via glycolysis to ATP (adenosine triphosphate), which is the immediate source of energy for muscle cells. The body uses ATP for immediate energy needs or stores it in the form of glycogen to be used at later time.

When the blood glucose level falls below normal ranges (70 – 110 mg/dL) then glucose can be made in the liver from carbohydrates and protein but not from fat; no body fat can be converted into glucose but glucose can be converted into fat in the liver! The conversion of protein to glucose is called gluconeogenesis and it happens in the liver, where proteins from the lean body mass (muscles) are converted into glucose.


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