AXIS-HT™ is BSN's multi-dimensional natural testosterone amplifying formula. Testosterone in and of itself is the male sex hormone responsible for controlling the rate of muscle repair and aggression. It's important to know that AXIS-HT™ is not a hormone. Rather, it's a supplement that simply signals the body to maximize its own natural testosterone production, providing you all the benefits of elevated testosterone levels.* AXIS-HT™ also helps prevent overtraining and even contains a special combination of minerals that will allow you to sleep better.* Remember, it's when you sleep that testosterone and growth hormone release are maximized. Don't be average, be hardcore! Maximize your gains in and out of the gym.