Castrated men, who have almost no testosterone, may retain their hair, but men with low testosterone levels can still go bald. That's because it is not the amount of testosterone circulating in the bloodstream that dictates baldness, it's down to genetics. That's it. So if you are lucky and you have good genetics then maybe after having a treatment with testosterone booster supplements, by the way here is a good article about medicines docarzt.com, you will succeed and have your hair back, but if not, then you will have to transplant it from other parts of your body.