What are Aromasin and Arimidex?
Both are aromatase inhibitors, often shortened to AI. Aromasin is a brand name for exemestane, and Arimidex is a brand name for anastrozole. What we stock are research compounds, not brand products.
Aromatase is an enzyme that turns androgens, hormones such as testosterone, into estrogen.
Both compounds slow aromatase in lab tests, so less estrogen is made in the test system.
How the two compare
- Binding. Aromasin locks onto the enzyme for good, while Arimidex holds on and then lets go.
- Structure. Aromasin is steroidal, meaning it is built on the same four-ring carbon frame as testosterone and estrogen. Arimidex is non-steroidal and does not share that frame.
- Type of block. Aromasin is known as a suicide inhibitor because it shuts down each enzyme it binds for good.
- Names. Exemestane and anastrozole are the chemical names behind the two brands.
How researchers use them
- Enzyme assays. Labs measure how much aromatase activity remains after a dose.
- Binding tests. Studies compare a binder that locks on with one that lets go.
- Estrogen levels. Work measures estrogen in the test system before and after.
- Anti-estrogen research. Both are studied beside other anti-estrogen compounds.
What we stock
Both sit in our anti-estrogen category, and each batch is quality tested for purity.
Labs often pair this work with the SARMs category or our research peptide range.
The full store lists every compound we carry.
Shipping in Canada
We ship across Canada, and delivery takes 3 to 7 business days.
Orders go out by Canada Post or Federal Express, with tracking on every order. Orders over $399 CAD ship free.
Every box is plain and unmarked, and the label says nothing about what is inside. You can pay by Interac e-Transfer at checkout.
Common questions
What is an aromatase inhibitor?
It is a compound that slows aromatase, the enzyme that makes estrogen from androgens.
What is the main difference between the two?
Aromasin shuts each enzyme down for good, while Arimidex blocks it for a while and then lets go.
Which one is steroidal?
Aromasin is steroidal, and Arimidex is non-steroidal.
What does AI mean on this page?
AI is short for aromatase inhibitor, the class both compounds belong to.
Why does each one have two names?
Each has a chemical name and a brand name: Aromasin is exemestane, and Arimidex is anastrozole.
Sold for laboratory research only. Not for human consumption.
