Hi there! Low-T is when someone has a low amount of testosterone in their body. Testosterone is a hormone that helps build muscle, gives you energy, and makes you feel like a grown-up.
Just like how you need food to give you energy, your body needs testosterone to do lots of important things. If your body doesn't have enough testosterone, you might feel tired, sad, or like you don't have as much muscle as you want.
Doctors can check how much testosterone you have by looking at your blood. If they see that you have low-T, they might give you medicine to help you feel better. The medicine is like a booster shot for your body to help it make more testosterone.
But remember, even if you have low-T, it's important to still be healthy! That means eating good food, getting enough sleep, and exercising. That way your body can be as strong as possible, with or without a little help from medicine.