Estrogen Blockers

Estrogen Blockers, also known as Aromatase Inhibitors, are taken during or after a prohormone cycle to limit estrogen conversion and reduce side effects some users experience during a prohormone cycle. Some users will also take Estrogen Blcokers after a cycle to prevent a rebound of gyno or gynecomastia. Estrogen Blockers fall into the categry of cycle support supplements which also includes liver and organ support supplements however estrogen blockers are specifically designed to reduce or block the conversion of testosterone into estrogen to to prevent gyno and other side effects of running a prohormone cycle.