Basically, Letrozole is a drug that was developed to treat against breast cancer by inhibiting aromatization. It is generally used as part of aggressive treatment in postmenopausal women, to fight and reverse the spread of breast cancer after other treatments have failed (such as tamoxifen therapy). It is probably the most effective product on the market for this purpose currently, it is very similar to the structure and action of its predecessor the arimidex.
Letrozole is also particularly interesting for bodybuilders and athletes. First of all, it has been proven that reduce estrogen levels to 98% or higher. This is obviously a huge interest for bodybuilders. Indeed, Less estrogen in the body eliminates the side effects of steroids such as water retention, gynecomastia, and acne. This makes Letrozole one of the best anti-estrogens on the market, even for very difficult cycles. Also, if you perform bodybuilding competitions Letrozole helps to have a dry and striated muscle. The effective dose for letrozole is 2.5 to 5mg per day. If you exceed this dose, there may be a risk of loss of libido. Moreover if you keep your estrogen levels too low for too long you will eventually weaken your immune system.
Note that letrozole can also be used in post-cycle therapy. Indeed letrozole increases LH and FSH (which are hormones that boost your testes to produce more testosterone). Letrozole is 2 to 5 times more potent than anastrozole (arimidex) and lasts longer in the body, but take some time to start. You need to take letrozole for 60 days to achieve a balance in the blood plasma level. Even more impressive, letrozole can reduce or eliminate existing gynocomastia ! In conclusion, letrozole is a complete anti-estrogen that protects during and after the recovery cycle and eliminates the negative effects of steroids all by providing an aesthetic advantage on quality muscle.