From ages 20 to 70 we see a loss of lean body mass due to up to 30% loss in the number of muscle cells, atrophy of muscle cells, and a general decrease in muscle strength.

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This statement is true. As we age, we experience a natural loss of lean body mass due to various factors, including a decrease in muscle cells and muscle atrophy. This can contribute to a decrease in muscle strength and overall physical function.

From Ages 20 to 70 We See a Loss of Lean