Your metabolism

It is in every cell in your body. It refers to a series of chemical processes in each cell that turn the calories you eat into fuel to keep you alive.

The body's major organs — the brain, liver, kidneys, and heart — account for about half of the energy burned at rest, while fat, the digestive system, and especially the body's muscles account for the rest.

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Your metabolism starts slowing down at age 18, and other facts about a widely misunderstood process

Your metabolism starts slowing down at age 18, and other facts about a widely misunderstood process

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