Testosterone replacement therapy (TRT) is a form of medical treatment that helps restore testosterone levels to a healthy level by providing prescription testosterone. In most cases, injectable testosterone is administered either weekly or bi-weekly. This results in a steady supply of testosterone in the blood and, eventually, the reversal of low T symptoms. Hence, the goal of TRT is to re-establish and maintain proper testosterone levels. After being on TRT for a few weeks, many men notice they are able to sleep better, their sex drive is higher, they have more confidence and motivation, they have an easier time building muscle and losing fat, and their energy levels are greater. Adult males with low T are the ideal candidates for TRT since testosterone levels tend to fade as we age past our 20s. However, some younger males may be candidates for TRT if they have primary or secondary hypogonadism since these signify a dysfunction either in the testes or the brain, respectively. Regardless of what age you are, low T is not something to be taken lightly and TRT is the most effective way to treat this condition.