Arimistane, also referred to as Androsta 3, 5-dien-7, 17-dione is an aromatase inhibitor (AI).

It’s used to control estrogen levels. Essentially, it helps stop Testosterone from converting into estrogen.

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That is the reason the usage of Arimistane is becoming extremely popular amongst bodybuilders. Certain steroids such as Dianabol and Sustanon can make a spike in estrogen.

Androsta 3, 5-dien-7, 17-dione is also used to help combat aromatization out of prohormones along with other performance enhancers.

This chemical is not to be mistaken with Aromasin (Exemestane).


Now that we know it’s an aromatase inhibitor (AI), you are probably wondering how this stuff really works.

Well, what it’s it neutralizes aromatase activity by binding to the aromatase enzyme.

This means it prevents Testosterone from turning into estrogen.

It’s quite complicated but it makes a fantastic Post Cycle Therapy (PCT).

I’ve personally used it several times after my 1-Andro, 4-Andro along with other cycles.


You have to be careful with dosing Arimistane (Androsta 3, 5-dien-7, 17-dione). You definitely do not need to crash your estrogen since this can cause unwanted effects.

The dosage for Arimistane is anywhere from 25 to 75mg per day.

I’d suggest beginning with 25mg daily to see how you respond to the effects of this compound. From here, you can gradually build up the dosage.

You’ll discover users who go over 75mg daily, but it is only advised to do so whenever you’re experienced and know what you do.


Based on my research, it has a half-life of roughly 2 to 3 hours.

This means that it needs to be dosed multiple times per day to keep stable levels in the system.


A lot of individuals wish to know whether this chemical could assist with Gyno.

It is hard to say if it is going to work ensured but I would strongly suggest giving it a shot if you’re facing issues with gyno.

As for me, I really don’t have any experience with using this particular compound to help fight gyno.

However, I’ve read people who’ve had good results whilst using it to fight gyno.

If you’re searching for something to prevent Gyno during or after a cycle, then this item is definitely your best bet.


I’ve used a number of distinct Arimistane supplements but found just one to be the best when it comes to quality.

I am talking about Alpha AF by Steel Supplements.


Personally, I think Arimistane is a great OTC anti-estrogen product. My personal preference goes out to Alpha AF because it has a far superior formulation.

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Many people use it as a PCT to get prohormones or even SARMs as it is compared mild to others.