system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does testosterone affect muscle growth?
gpt
Testosterone is a messenger. It's made by one part of your body (testicals, adrenal glands, ovaries) and the message it sends is basically "be more man like". So when your muscles get the message they are like "f yea let's grow bigger" and they do. It also tells your bones to grow faster, your chin to get broader, your voice to deepen, and other stuff. Everyone has some testosterone in them but men have something like 100x more than women on average.