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Letrozole (1 mg/60 capsules), 60 mg


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  • Chemical Formula: C17H11N5
  • Molecular Mass: 285.303
  • Synonyms: Femara
  • Molar Mass: 285.303
  • CAS Number: 112809-51-5
  • PubChem: 3902
  • Total Amount of the Active Ingredient: 1mg/60 capsules
  • Shelf Life: 36 months



  • Letrozole is a third-generation type II aromatase inhibitor. Aromatase inhibitors inhibit the action of the enzyme aromatase, which converts androgens into estrogens through a process called aromatization. Letrozole has a long duration of action with a half-life of over 42 hours.


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You can have the product you bought from us tested at any HPLC-licensed testing facility and if the results are negative, we will refund the following:

  • Cost of HPLC test
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Independent Test Results

All of our products are lab tested and the results are periodically published on the website.


Peer-Reviewed Studies 

Saylam, B., Efesoy, O., & Çayan, S. (2011)

Fertility and sterility, 95(2), 809-811.

De Boer, H., Verschoor, L., Ruinemans‐Koerts, J., & Jansen, M. (2005)

Diabetes, Obesity and Metabolism, 7(3), 211-215.