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Prohormones Guide Part 1
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  Prohormones & Andro
  19 NorAndrostenedione
  Androstenedione Vs Androdiol
  Andro Stack 850 Review
  Androstenedione Research
  Andro Side Effects
  Andro FAQ
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  DHEA Side Effects & Benefits
  Ergopharm 1 AD Prohormone
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  Biotest Tribex 500 Review
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BSN NO Xplode Review
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100% Whey Protein Review
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  NO Xplode Creatine Review - BSN
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  Whey Protein Compared - 1
  Whey Protein Compared - 2


Prohormones - Andro, Androstenedione & Androstenediol

Andro, (Nor) Androstenedione, Androstenediol - Such Mind-numbing Terms! (2003)

These are some of the most talked about prohormones. Okay, you're probably wondering what the heck is all this Andro, Androstene, Androstenedione, Androdiol stuff? I'm sure you've probably heard about some of these terms, especially Andro, which every time brings Mark McGuire to mind. :) In short, Andro is a Prohormone that aids in testosterone production - it's a direct hormone precursor of testosterone. We've prepared a series of articles on prohormones with Andro, Androstenedione, and Androstenediol explained in simple terms.

If the names of these prohormones aren't bad enough, you get all these variations like 4-Androstenedione, 4-Androstenediol, 5-dione, 5-diol, 19-Nor-4, 19-Nor-5... Holy crap... Yeah, confusing ain't it? I get a headache looking at these prohormones. Why couldn't they just call these pro-hormones some easy to read and remember names? Well, these pro-hormone names (and those numbers) have to do with the chemical structure of the hormone. We'll try to keep it simple and straight forward.

Different Categories Of Prohormones - The "Andro" Family

Let's keep it simple. First, let's see what's the difference between Androstenedione and Androstenediol.

In short, Androstenedione and Androstenediol are the 2 only compounds that convert directly into testosterone, which is why you'll hear that Andro is just one step away from testosterone. You've probably heard of DHEA, but DHEA converts directly into these 2 Andro compounds, and is therefore, 2 steps away from testosterone. Simple right?

Beyond these 2 basic Andro compounds, there are these what you call 19-Norandrostenedione and 19-Norandrostenediol, or in short, 19-Norandro. These 19-Norandro compounds convert into Nortestosterone, which is a very anabolic (muscle building) hormone.

To read about the differences between Androstenedione and Androstenediol in detail, read this artcile on Andro.

Andro research update

The Difference Between Androstenedione and 19-Norandrostenedione

So, you want to know why Andro and 19-Norandro are different? Actually, they're not that different, just differ by a few atoms. ;-) Androstenedione is identical to testosterone, except it's missing a hydrogen atom in the 17th position. When Androstenedione is processed by the liver, a hydrogen is added to complete the testosterone - now you see how it's 1 step away from testosterone?

19-Norandro is missing the 17th hydrogen and 19th carbon atoms. When 19-Norandrostenedione is processed by the liver, only a hydrogen atom is added to the 17th position, no carbon atom is added to the 19th position. This creates the Nortestosterone.

Sub-categories of Andro and 19-Norandro Substances

When you buy prohormones, you're going to see all these variations of the Andro and 19-Norandro compounds. So why the big fuss with these pro-hormones? Let's see what these sub categories of Andro and 19-Norandro are.

In the "Andro family" there are 3 categories: 4-Androstenedione, 4-Androstenediol, and 5-Androstenediol, or simply 4-dione, 4-diol, and 5-diol. Of these three, 4-Androstenedione is the least expensive. In a lot of prohormones supplements, you'll find that they use a combination of the -dione and -diol compounds.

Now, in the "19-Norandro family" there are also 3 categories: 19-Nor-4-Androstenedione, 19-Nor-4-Androstenediol, and 19-Nor-5-Androstenediol. You'll see them also referred to as: 19-Nor-4-dione, 19-Nor-4-diol, and 19-Nor-5-diol.

If all the product selection is too overwhelming for you, I recommend you read our Ergopharm 1 AD.


To learn more about prohormones, and more about Andro -dion - diol -Norandro, read these following articles:

All the information you need about Androstenedione

Andro, Nor-Andro side effects

Tirbulus Terrestris Information