Post cycle therapy is a method of employing supplements which work synergistically via various mechanisms to stabilise and restore balance back to normal once a suppression anabolic/thermogenic cycle has ended. Post Cycle Therapy can sometimes be one of the most important (yet overlooked) aspects of a complete, successful stacking cycle. PCT is of great importance because it ensures you retain the gains you make during a steroid/supplement stacking cycle. Most often only used for 30 days. You do not need to stay on PCT.