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Letrozole is non-steroid inhibitor of aromastase with the selective effect (do not disturb the metabolism of other similar substances). Inhibitors of aromastase lead to the maximal decrease of estrogen levels. The medicament is used for treatment of some types of breast cancer. It helps also to prevent from repeated return of cancer. Letrozole decreases the amount of estrogen by obstructing the enzyme (aromastase) to participate on their formation.

In athletics and bodybuilding it is used for decrease of estrogen values, while it slightly increases the testosterone level. Great amount of anabolic steroids is aromatized, which means the process bringing many negative side effects, such as acne, water retention in the body or gynecomastia. For bodybuilders means the decreased level of estrogen lower risk of negative estrogen effects. Letrozole is suitable for the strongest volume or shape steroid cycles. It is also a great helper in the period of pre-competition diet, when it will help you to shape your muscles into sharper look.


Generally recommended is the dose of 2,5 mg tablet once a day. Tablet is washed down by water or other fluid. Bodybuilders use the dose of 5 mg, separated into two parts. In available literature, you can find also the dose higher than 25mg, but you risk the loss of sexual appetite. Tablets are consumed independently from food.

Side effects:

Similar to all medicaments, also Letrozole can cause side effects, which however do not show by everyone. Side effects are usually mild or middle serious nature. Most of side effects is related to decreased level of estrogen. Most commonly it is high temperatures, headaches, hair loss, weakness, sensitive skin or eyesight problems.

Warning: Do not exceed the recommended daily dose. Do not consume if you are allergic on any of product´s ingredient. Not suitable for pregnant and breast-feeding women. If you suffer on serious liver or kidney disease, the medicament Letrozole is not suitable for you. Attention! Consummation of this medicament may negatively influence your concentration while driving. Keep away from children.


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