Testosterone levels naturally decline with age, about 2% every year for men over 35. This happens because the function of the testicles and HPA axis both decline, leading to a drop in testosterone.

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Testosterone levels naturally decline with age, about 2% every year for men over 35. This happens because the function of the testicles and HPA axis both decline, leading to a drop in testosterone.

Testosterone levels naturally decline with age, about 2% every year for men over 35. This happens because the function of the testicles and HPA axis both decline, leading to a drop in testosterone.

Testosterone levels naturally decline with age, about 2% every year for men over 35. This happens because the function of the testicles and HPA axis both decline, leading to a drop in testosterone.