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Your body is an energetic machine. It needs a constant supply of energy to do work: moving your muscles to run, carrying objects in your environments and maintain basic cellular processes. To keep a ready supply of energy, your body stores this as potential energy in the form of chemical bonds that make up fat. So when you lose weight, your body breaks down this stored fat, releasing the energy to keep your body functioning. This energy goes towards doing useful work, and much of it is also expelled as heat. A small portion of these metabolized lipids would be excreted, but most are probably recycled in other cellular processes.

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18y ago

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