When overweight men eat fewer calories, it raises a protein in their blood that changes how their body uses testosterone, which can impact things like energy and health.

When overweight men eat fewer calories, their bodies slow down the process that turns testosterone into estrogen. This means they have more testosterone relative to estrogen, showing that fat tissue isn't making as much estrogen as before.

Increased levels of sex hormone-binding globulin, which is influenced by fat stored in the hips and thighs, reduce the amount of free testosterone in the body, and this mechanism accounts for about 25% of why this fat distribution is linked to a lower risk of polycystic ovary syndrome.

When overweight men eat fewer calories, it helps their bodies produce testosterone better, which is good for their reproductive health.

When overweight men eat a very low calorie diet for 12 weeks, their testosterone levels go up a lot, which can help improve their health.

When young men eat way less food than usual, giving them a high dose of testosterone helps keep their hunger hormone from spiking and helps them hold onto muscle, but it doesn’t make them feel less hungry or eat more.