Post Cycle Therapy (PCT) is a period of treatment that follows the use of anabolic steroids. When using anabolic steroids, the natural testosterone production is suppressed. Due to this suppression factor, most men include at least a minimal amount of testosterone in their steroid cycle. The outside source of testosterone provides the body with what it needs. However, once the steroid use comes to an end, body is still naturally suppressing the production of testosterone. And that is the purpose of Post Cycle Therapy (PCT), to stimulate natural testosterone production so that we are not left in a low testosterone state.