Metabolism: what is it and how it's important?

We hear it often: metabolism is the key for weight management. But what does metabolism mean exactly? Is it simply the way our bodies "burn" energy? First we need to understand how our bodies work in terms of energy expenditure. Foods are energy "IN" and how our bodies process that energy is the energy "OUT". The total amount of energy the body needs during a period of 24 hours is named Daily Total Energy Expenditure. For a sedentary individual, this expenditure of energy is divided into the following: Resting metabolism makes up 70% of the total energy spent; Thermic effect of food makes up about 10% of the total energy spent; and Physical activity (even light ones such as getting up from a

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