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- $Unique_ID{BRK01177}
- $Pretitle{}
- $Title{When You Lose Weight, Where Does the Fat Go?}
- $Subject{fat weight loss nutrition losing burns burning carbohydrates proteins
- oxidation metabolism metabolic food foods diets diet fats burn carbohydrate
- protein oxidize}
- $Volume{C-26}
- $Log{
- Fat Distribution in the Body*0003401.scf}
-
- Copyright (c) 1991-92,1993 Tribune Media Services, Inc.
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- When You Lose Weight, Where Does the Fat Go?
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- QUESTION: I really appreciate your answers to questions about nutrition, fat
- and losing weight. My question is: when you lose weight, where does the fat
- go? What form is it in when it leaves your body? Please go beyond just
- saying that your body burns it. What happens in the burning process?
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- ANSWER: Fats, to use the term in its broadest chemical sense, are composed of
- long chains of carbon and hydrogen atoms, with just an occasional oxygen atom
- here or there. In this fashion they resemble both carbohydrates (which
- contain more oxygen) and proteins (which contain, in addition, atoms of
- nitrogen). In contrast, coal and fuel oils which also give energy when
- burning are simple hydrocarbons, containing only hydrogen and carbon but no
- oxygen. And oxygen is needed for the "burning process," both in and out of
- the body. When it occurs the process is known as "oxidation", and the
- chemical reaction provides the heat and energy we need for all body functions.
- During this process the fats are broken down, their hydrogen and carbon atoms
- combining with the oxygen to form (in the very last stage) water (H2O) and
- carbon dioxide (CO2). Thus you breathe in oxygen but exhale carbon dioxide,
- and a great deal of water vapor too. In many ways the process is identical to
- burning coal, which produces flame in addition to the heat and energy. In the
- body the reaction is not quite as dramatic, and is handled by a wide
- assortment of enzymes and other chemicals. When the body requires more
- energy, to provide for muscle contractions during exercise for example, the
- oxidation process must be turned up. Although the body generally uses its
- carbohydrates (sugars) first for this reaction, it must soon use the reserve
- energy resources contained in the fat tissue when those carbohydrates are used
- up. And when fat supplies are gone, the body starts to burn its proteins
- (contained in muscles) as the fuel for the needed energy. That explains the
- often written statement about balanced nutrition and regular exercise as the
- proper prescription for weight loss. If you keep the fire going, but limit
- the amount of coal you shovel on, your "coal pile" will soon disappear!
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- The material contained here is "FOR INFORMATION ONLY" and should not replace
- the counsel and advice of your personal physician. Promptly consulting your
- doctor is the best path to a quick and successful resolution of any medical
- problem.
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