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Glucose is the simplest form of carbohydrate that can be easily broken down to give energy. Hence, we get instant energy from glucose.
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Glucose is the simple form of carbohydrate which is readily used up by our body cells to provide energy. Glucose (dextrose) is the sole source of energy to the brain. Glucose undergoes oxidation inside the cell to produce ATP molecules which are said to be energy coins.
For example, during football match, the person run fast and his body loses some electrolytes along with water by dehydration process. As he consumes glucose, immediately his body gets rehydrated with energy also.
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Glucose is a simple sugar. Carbohydrates, when consumed, gets digested into glucose. As glucose can be easily absorbed in blood, it provides instant energy to the body.Hence, when glucose is taken directly, it does not have to be digested and thus acts as an instant source of energy.

Carbohydrates are absorbed in the form of glucose which provides instant energy.
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