What are Aromasin and Arimidex?
Both are aromatase inhibitors. That name is often shortened to AI. Aromasin is a brand name for exemestane. Arimidex is a brand name for anastrozole. What we stock are research compounds, not brand products.
Aromatase is an enzyme. An enzyme is a protein that speeds up one chemical step. This one turns androgens into estrogen. Androgens are hormones such as testosterone.
An inhibitor is a molecule that slows an enzyme down. Both compounds slow aromatase in lab tests. Less aromatase activity means less estrogen made in the test system.
How the two compare
- Binding. Aromasin locks onto the enzyme for good. Arimidex holds on, then lets go again.
- Structure. Aromasin is steroidal. That means it is built on the same four-ring carbon frame as steroid hormones. Arimidex is non-steroidal, so it does not share that frame.
- Type of block. Aromasin is called a suicide inhibitor. 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 is left after a dose.
- Binding tests. Studies compare a lock-on binder with a let-go binder.
- Estrogen levels. Work measures estrogen in the test system before and after.
- PCT study. Both show up in PCT research, beside other anti-estrogen compounds.
What we stock
Both sit in our anti-estrogen category. 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 right across Canada. Delivery takes 3 to 7 business days.
Orders go out with Canada Post or Federal Express. Tracking comes with every order. Orders over $399 CAD ship free.
Every box is plain and unmarked. The label does not say 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 the aromatase enzyme. That enzyme makes estrogen from androgens.
What is the main difference between the two?
Aromasin shuts each enzyme down for good. Arimidex blocks it for a while, then lets go.
Which one is steroidal?
Aromasin is steroidal. Arimidex is non-steroidal.
What does AI mean on this page?
AI is short for aromatase inhibitor. It is 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. Arimidex is anastrozole.
Words you might not know
- Aromatase — the enzyme that turns androgens into estrogen.
- Enzyme — a protein that speeds up one chemical step.
- Inhibitor — a molecule that slows an enzyme down.
- AI — short for aromatase inhibitor, the class both compounds sit in.
- Steroidal — built on the same four-ring carbon frame as steroid hormones.
- Suicide inhibitor — a molecule that shuts an enzyme down for good.
- PCT — a set of compounds labs study at the end of a run.
Sold for laboratory research only. Not for human consumption.
