Why do bodybuilder’s testicles shrink when taking testosterone/growth hormones rather than getting bigger?

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As title says, it seems counterintuitive that a side-effect of steroids and other enhancing drugs is a shrinkage of the testicles when I always associate testicles with testosterone levels.

In: Biology

3 Answers

Anonymous 0 Comments

Your hormonal system is very very regulated. Testosterone level are very tightly maintained to a certain level to make sure everything goes well in terms of spermatogenesis but also for general bodility functions (hormones act on everything).

Anabolic steroids or taking huge amounts of testosterone fucks with your hormonal system. And when your body detect that there is too much testosterone in it, it stops producing. When your testicules stop producing testosterone, they shrink.

That’s why, sometimes on reddit, when I see stuff like “I’m feeling low, I think I have lower testosterone, where should I get supplement ?” it makes me a little upset. You do not take testosteron supplement just because you feel low and too much testosterone is basically the same as no testosterone because your body is set to brake on testosterone production when there is too much. If you feel low, go see a doctor.

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