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Throughout your lifespan......your bones continue to defy the force of gravity. From age 13 to atleast 50, your body's growing rate begins to slow down or decrease. Once that has stopped, your bones can no longer defy the force of gravity and begin to bend downwards. This why your height decreases. Even thought your bones are still healthy enough to produce white blood cells, they cannot stop this action. Once your bones are damaged at your age they will take very long to heal. That is why people lose several inches of height during their old age.......

There might be other factors but this is basically the main one

-Mitch

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14y ago

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