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2017, Number 1

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Rev Cuba Endoc 2017; 28 (1)

What is causing the obesity epidemic?

Kahn R

Language: English
References: 28
Page: 1-5
PDF size: 139.66 Kb.


Text Extraction

Over the last few decades the incidence and prevalence of obesity has become epidemic throughout the world. Why have we seen the swift emergence of this disease? To understand the complexity of the problem, it's necessary to appreciate the concept of "energy balance".
The amount of energy entering the body (as carbohydrate, fat or protein) is used to supply all tissues and organs with metabolizable fuel, or is stored in the form of fat in adipose cells, glycogen in the liver, or protein, or, lastly, is excreted as unabsorbed energy.
Thus, simply put, energy intake is equal to energy expenditure, which is in essence the First Law of Thermodynamics. Intake being all the food we eat, and expenditure being the metabolism necessary for life, the physical activity we perform, along with a relatively miniscule amount of unabsorbed energy. Whereas we have no control over our resting metabolism or the energy necessary to digest food, we can in large part influence the energy expended from physical activity.


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