Many athletes take estrogen blockers as part of their PCT (post-cycle therapy). Estrogen blockers are supplements that help to reduce the amount of estrogen in the body. This can be helpful for preventing side effects such as gyno (growth of breast tissue in men) and water retention. Estrogen blockers can also help to improve rates of recovery and reduce the risk of injury. However, they should only be used under the supervision of a qualified medical professional. When used correctly, estrogen blockers can be a valuable tool for athletes who are looking to improve their performance and recovery.