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Human physiology is the science of the mechanical, physical, and biochemical functions of humans in good health, their organs, and the cells of which they are composed. The principal level of focus of physiology is at the level of organs and systems within systems.

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Does men's testosterone increase with age?

One study argues the opposite, that testosterone drops with age: In the present study in 890 generally healthy, middle class, American men in the BLSA, we found that both T and free T index (a c …
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