Description

Tamoxifen is classed as a specific estrogen receptor modulator or SERM. It acts as an estrogen antagonist in the brain and the breast area meaning it prevents estrogen from exerting its normal effect in those areas. With respect to its action in the brain it inhibits the conversion of testosterone to estrogen which during a cycle can mean that estrogen levels remain low. Although low estrogen is often considered advantageous by bodybuilders it should be noted that estrogen helps both with the accrual of muscle mass and also helps to boost libido on cycle. In fact, when bodybuilders use testosterone enhancing compounds and run tamoxifen alongside it, they often lose out on some of the muscle gains and enhanced libido that normally accompanies testosterone elevation.