I recently read https://ways2well.com/blog/how-melatonin-affects-testosterone-levels-in-men information on how melatonin may be linked to testosterone levels in men. I liked the approach—not looking for a single cause, but rather viewing the body as a system in which sleep, stress, and lifestyle all play a role. This kind of material helps me better understand why regular rest and healthy habits can be an important part of maintaining well-being.