Promifen

Promifen is a selective estrogen receptor modulator (SERM) that works by binding with estrogen receptors without activating them. It acts as a partial anti-estrogen and counters side effects caused by aromatization. Although it doesn’t lower the amount of estrogen in the body, it can be used effectively as a mild anti-gynecomastia treatment.

Promifen increases the rate of production of Luteinizing Hormone (LH) and Follicle Stimulating Hormone (FSH), and can be used to spike testosterone levels while the body recovers and starts to produce testosterone naturally again. This is especially beneficial following the conclusion of a steroid cycle.

Promifen is often used as the only SERM in post cycle therapy due to its overall effectiveness and additional benefits such as restoring libido and energy levels.