Buy Exemestane — Peptide Sciences Alternative QSC has Exemestane in stock — ≥99% HPLC · Janoshik COA · US Domestic 2–4 Days
Former Peptide Sciences customers: QSC ships Exemestane from a US domestic warehouse in 2–4 business days with Janoshik independent COA verification — a superior standard to Peptide Sciences’ in-house COA. In stock now.
Peptide Sciences has permanently closed. QSC stocks Exemestane at ≥99% HPLC purity with Janoshik independent COA — verified by an external laboratory, publicly checkable at verify.janoshik.com. US domestic warehouse, same shipping speed you were used to with PS.
Why QSC for Exemestane?
Why the COA difference matters
Peptide Sciences — In-House COA
Certificate issued by Peptide Sciences themselves
No public verification link — you trust the seller
Result can be updated or removed by the seller
No independent laboratory relationship
QSC — Janoshik Independent COA
Certificate issued by Janoshik — no commercial relationship with QSC
Result published at verify.janoshik.com — publicly verifiable by anyone
Once published, the result cannot be altered by QSC
Unique batch code included with every order
Exemestane at QSC — Specifications
Compound
Exemestane
Mechanism
Steroidal/suicidal aromatase inactivation
Category
Ancillaries
Purity
≥99% HPLC · MS confirmed · every batch
COA
Janoshik independent · verify.janoshik.com
US Shipping
US Domestic Warehouse · 2–4 business days
Form
Lyophilised powder · research grade
Frequently Asked Questions
Where can I buy Exemestane now that Peptide Sciences has closed?
QSC (qscpeptide.com) stocks research-grade Exemestane at ≥99% HPLC purity with Janoshik independent COA — available now, shipped from US domestic warehouse in 2–4 business days. Exemestane is a core compound in QSC’s catalog. Every batch is verified by MS molecular confirmation in addition to HPLC.
Is QSC a good replacement for Peptide Sciences Exemestane?
Yes — QSC’s Exemestane is verified at ≥99% HPLC purity with a Janoshik independent COA, which is a superior verification standard to Peptide Sciences’ in-house COA. Janoshik COAs are issued by an external laboratory (verify.janoshik.com), publicly verifiable using the batch code included with every order, and cannot be altered post-publication by QSC.
How does QSC Exemestane compare to Peptide Sciences Exemestane?
Both QSC and Peptide Sciences marketed ≥99% HPLC purity for Exemestane. The key difference is verification: Peptide Sciences used an in-house COA (self-issued, not independently verifiable). QSC uses a Janoshik independent COA — any researcher can verify the published result at verify.janoshik.com using the unique batch code. QSC also ships from a US domestic warehouse (2–4 business days) and stocks next-generation compounds Peptide Sciences never carried.
What is the mechanism of Exemestane?
Exemestane (Steroidal/suicidal aromatase inactivation). QSC maintains a dedicated research hub at qscpeptide.com/exemestane-research/ covering mechanism of action, clinical data, storage protocols, and comparative analyses. All QSC Exemestane is sold for in vitro laboratory research only.
