The Post Cycle Therapy (PCT) is used to intensify your workout with the creation of estrogen blockers, while letting your natural testosterone enhance your body to where you want it after your workout. Estrogen increases have been paired retention of water, looking puffy and increase in fat in the body, so these PCTs help limit these affects and increase your testosterone to get you lean and strong looking AND feeling muscles. Looking for other inside information and supplements? Black Diamond is proud to be your go to for health supplements, fitness supplements and prohormones and much more. Browse our website for all of your supplement needs.