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The two top prohormones on the market today are 4-Andro which converts to testosterone and 1-Andro which converts to 1-testosterone.  These chemicals sound very similar but they are quite different in effects and how they react in the body.  Both have their place in the bodybuilding arsenal but when and if you use these depends on your individual needs.


1-Andro is the current KING of prohormones since it converts to the monster anabolic 1-Testosterone.  Although this sounds close to “testosterone” the “1” in the front has some serious meaning.

First, 1-Testosterone is more anabolic mg for mg than it’s cousin Testosterone.  This doesn’t mean that it builds “more” muscle than testosterone but more that you need way more testosterone to build an equal level of mass than 1-Testosterone.

1-Testosterone also has different side effects than it’s cousin testosterone.  First off, 1-Testosterone doesn’t convert to DHT, which means you will have less hair loss and less prostate issues when taking 1-Testosterone.  It does however add a bit of strain to the liver, which means you may want to take a liver support product with 1-Andro.

1-Testosterone can lower sex drive and also dry out the joints.  Finally, because it’s so anabolic, 1-Testosterone and 1-Andro can cause fatigue if you aren’t consuming enough calories.


Testosterone is the king of steroids and no other anabolic feels as good as testosterone.  4-Andro converts through numerous pathways directly to testosterone without having the problems with standard DHEA like estrogen side effects.  4-DHEA isn’t anabolic on its own but it does have a very good conversion ratio.  Unfortunately the dose needs to be higher than other hormones because testosterone is converted and back converted to so many other hormones.

Testosterone has classic side effects like increased sex drive, potential hair loss and enlarged prostate.   It also gives a feeling of well being and more of an “alpha male” attitude.


This is a list of the POSSIBLE side effects from andro products.  Remember these won’t happen to everyone only about 5% of the people will develop side effects at all in our opinion.

Prohormone Chart

So, just be aware that there are possible side effects with all prohormones but again they are not very common.

The bigger question is which one builds muscle mass more effectively?

That’s an easy answer…1-Andro by far is more anabolic and builds more mass along with proper diet and exercise.  So, if you are looking to purchase one of the two or if you want to know which one to dose the highest, then go with 1-Andro because it truly is the king of prohormones!