Full product catalog is available after authentication authenticate here!
Free US shipping for orders above $200
Skip to content Full product catalog is available after authentication authenticate here!
Free US shipping for orders above $200
This product is intended solely for use as a research chemical in vitro and laboratory experimentation by licensed, qualified professionals.
Letrozole (brand names Femara) is a third-generation nonsteroidal aromatase inhibitor (AI) primarily used to treat hormone receptor-positive breast cancer in postmenopausal women.
| Specifications | Price |
|---|---|
| 2.5mg × 100 tablets/bottle | $25.00 |
HPLS
Testing
Endotoxin
Assay
TYMC
Test
TYMC
Test
Heavy Metal
Screening
| Property | Details |
|---|---|
| Molecular Formula | C₁₇H₁₁N₅ |
| Molecular Weight | 285.30 g/mol |
| CAS Number | 112809-51-5 |
Estrogen is produced in postmenopausal women mainly through the aromatase enzyme, which converts androgens into estrogen.
Letrozole blocks this enzyme, significantly reducing estrogen levels.
This estrogen suppression helps prevent cancer recurrence and may also be prescribed off-label for other hormone-related conditions.
Breast Cancer Treatment
Reduces recurrence risk by 50% in hormone receptor-positive (ER+/PR+) breast cancer.
Superior to tamo*ifen in progression-free survival and overall response rates
Off-Label Uses
Ovulation induction in polycystic ovary syndrome (PCOS) (unapproved but clinically used).
Endometriosis management (limited evidence).
Some athletes and bodybuilders use Letrozole to counteract estrogen-related side effects of anabolic steroids, such as gynecomastia (male breast tissue growth).
Metabolic & Safety Advantages
No significant liver to*icity (unlike tamo*ifen, which causes fatty liver).
Minimal impact on lipids/cholesterol compared to steroidal AIs.
Disclaimer:All product is sold solely for scientific research purposes. Researchers are responsible for ensuring compliance with local regulations and institutional guidelines. Keep out of reach of children and unauthorized personnel.
All products are sold solely for scientific research purposes. Researchers are responsible for ensuring compliance with local regulations and institutional guidelines. Keep out of reach of children and unauthorized personnel.
1688pharmacy is more than just a trusted supplier of research peptides. We are committed to scientific advancement, dedicated to providing the highest quality pharmaceutical-grade compounds that empower researchers and clients to achieve their goals.
Our proprietary processes and meticulous sourcing of premium materials ensure that every peptide we offer meets the most stringent pharmaceutical standards with verified 99% purity.
Every peptide undergoes rigorous third-party laboratory testing using advanced techniques like HPLC, LC-MS, and NMR. Complete Certificates of Analysis available for transparency and verification.
We provide expedited worldwide shipping with reliable tracking and discreet packaging. Our dedicated customer support team assists with orders, storage guidelines, and product inquiries promptly.