Safe & Effective Letrozole Anti Estrogen Steroids , Natural Anti Estrogen Supplements

Basic Information
Place of Origin: CHINA
Brand Name: GSP
Certification: GMP , ISO 9001:2008
Model Number: CAS: 112809-51-5
Minimum Order Quantity: 10g
Price: Contact Us
Packaging Details: Stealth And Discreet Packaging
Delivery Time: Within 7 Working Days
Payment Terms: Bank Transfer - Bitcoin - Western Union - MoneyGram
Supply Ability: 500 KG/Month
Other Name: Femara MF: C17H11N5
MW: 285.3 MP: 181-183°C
Storage Temp: -20°C Freezer Appearance: White Crystalline Powder
High Light:

anti estrogen products


anti estrogen drugs


99.2% Safe & Effective Anti-Estrogen Letrozole / Femara Powder Pharmaceutical Grade




Letrozole is also called Femara, it is an oral non-steroidal aromatase inhibitor for the treatment of


hormonally-responsive breast cancer after surgery.

Estrogen are produced by the conversion of androgens through the activity of the aromatase


enzyme. Estrogen then bind to an estrogen receptor, which causes cells to divide.

Femara prevents the aromatase from producing estrogen by competitive, reversible binding to


the heme of its cytochrome P450 unit. The action is specific, and Femara does not reduce


production of mineralo- or corticosteroids.




Femara is a type II (non-steroidal) third generation aromatase inhibitor. Clinically it is used to


treat postmenopausal women with either estrogen receptor positive or estrogen receptor


unknown breast cancer.


In women with breast cancer, it has been shown to reduce estrogen levels by 98% or more.



However, it's use and benefits are not limited to eliminating estrogen in women.


For pre-contest bodybuilders, Femara is almost a necessity to eliminate water retention and


achieve the ripped look necessary to compete in today's bodybuilding world. However, in my


experience, it is only necessary to be used for the last 4-6 weeks, to eliminate excess estrogen


and water retention. After using Femara I recommend staying away from any estrogen


suppression for at least a month to try to normalize the body.



Lab Test Result:


Test Items Specification Results
Appearance White or off-white crystaline powder White crystalline powder



Soluble in Chloroform;

Soluble in ethanol when heated






Maximum absorption in wavelength of 240nm

Minimum absorption in wavelength of 215nm



Infrared spectrum should be in accordance the dominant peak of contrast In accordance with the dominant peak of contrast
Melting points 181℃-183℃ 182℃
Related substances ≤0.5% 0.3%
Single impurity ≤0.3% 0.2%
Loss on drying ≤1.0% 0.8%
Assay ≥98.0% 99.2%
Conclusion It conforms with Enterprise Standard




Letrozol is used treat early breast cancer in women who have experienced menopause and who


have had other treatments, such as radiation or surgery to remove the tumor. It is also used to


treat early breast cancer in women who have experienced menopause and who have already


been treated with a medication called tamoxifen (Nolvadex) for 5 years.



Letrozol is also used in women who have experienced menopause as a first treatment of breast


cancer that has spread within the breast or to other areas of the body or in women whose breast


cancer has worsened while they were taking tamoxifen.





Inside, by 2.5 mg/day, long course (5-10 Years and more).

Femara comes in tablets of 2.5 mg. For cancer, usual dosage is 2.5mg/day.

If you're taking Femara for fertility treatment, your doctor may tell you to take either 2.5 mg or 5


mg of the drug, beginning on the third day of your period for five days.



Safe & Effective Letrozole Anti Estrogen Steroids , Natural Anti Estrogen Supplements 0




Anti-Estrogen Series


Tamoxifen Citrate (Nolvadex)


Dutasteride (Avodart)


Clomifene Citrate (Clomid)


Finasteride (Proscar)


Letrozole (Femara)


Formestane (Lentaron)


Toremifene Citrate (Fareston)


Cabergoline (Caber)


Exemestane (Aromasin)


Raloxifene Hydrochloride


Anastrozole (Arimidex)





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