Letrozole, which is an aromatase inhibitor, has some uses in bodybuilding, although it is not intended for doping purposes and is only used under medical supervision. The following is a brief description of the substance and its characteristics, with particular emphasis on its use in bodybuilding:

Mechanism of action: letrozole inhibits the enzyme aromatase, which converts androgens (such as testosterone) into estrogens. As a result of this action, estrogen levels in the body are reduced.

Bodybuilding use: Letrozole is sometimes used in bodybuilding to control estrogen levels. During a steroid cycle, especially when testosterone boosters are used, aromatization – the conversion of testosterone into estrogen – can increase. This phenomenon can lead to estrogen-related side effects, such as gynecomastia (development of glandular breast tissue), water retention or increased blood pressure.

Estrogen control: Letrozole can help control estrogen levels, minimizing the side effects associated with excess of these hormones during a steroid cycle.

Dosage in bodybuilding: Dosages of letrozole in bodybuilding are usually lower than those used to treat breast cancer. It is used to maintain hormonal balance.