Ok firstly I cannot recall where i got this otherwise I would give props to the author but I found it helpful and hope you do too...
What is a “Test Base” for a Prohormone Cycle?
Prohormone Guide 2013 – What is a “Test Base”
When you search around the net you will often find guys talking about a “test base” which is simply a phrase that is short for “testosterone base”. Some believe it is needed for every prohormone cycle. The purpose of a test base is to do one of two things:
1. Increase your testosterone levels (via another prohormone or designer steroid)
2. Mimic the effects of testosterone (again via another prohormone or designer steroid)
Why do I NEED testosterone or the feeling of testosterone?
First off you don’t absolutely need a test base. In fact it was #4 on my list of Top Prohormone Forum Fallacies, which is in an older article you can find hosted on our forum (Top 5 Prohormone Forum Fallacies). In that article I pointed out the fact that the idea of using a test base has only been around for a few years. However people were running successful prohormone cycles long before the phrase test base was even coined. Still using a test base has merit.
Many compounds such as 1-DHEA can cause severe lethargy (the feeling of tiredness throughout the day), and even worse drop your libido. Both are side effects that can be mitigated by adding a test base. That is why you almost always see a test base included with some of the following popular compounds:
1-DHEA (ex, FRL Alpha Mass)
An illustration of the signals blocked when you use a suppressive prohormone.
19-norDHEA (ex, AMS Decavol)
Superdrol (M-Drol)
Methylstenbolone (ex, Ultradrol)
Epistane
Trendione (ex, Trenavar)
There are other compounds that often are used with a test base, but those are the most common. What you find in common with all of them (at least to some degree, which always varies by user) is that they cause fairly heavy suppression of the hypothalamic-pituitary gonadal axis (HPTA) over time. The HPTA is what tells your body to produce more or less testosterone. When you use a prohormone like 1-DHEA the HPTA recognizes the anabolic substance in your body and begins slowing down your natural testosterone production. Which over time (dose dependent) starts to make you lethargic, and kills your sex drive. The only way to overcome this is with a “test base”.
What are some common prohormones used as a test base?
Again this list is not all inclusive but it does include many of the currently popular options. Keep in mind the ultimate test base is testosterone itself. However to obtain testosterone legally you would need a prescription. Otherwise it is considered an illegal class III controlled substance (in the United States). The following compounds are currently available legally:
• 4-DHEA (or 4-AD) – This is actually a two step prohormone to testosterone itself. However in one step it converts to 4-androstenediol, which has some anabolic (testosterone like) effects in itself. It also converts to some estrogen, which many people like for the additional strength and mass it can provide due to some water retention. It’s usually favored in bulking cycles.
• Epiandrosterone (or Androsterone) - This is a precursor to Dihydrotestosterone (or DHT). It mimics the effects of testosterone particularly in a low testosterone environment (which you would have if you ran a prohormone cycle). It’s popular for not only it’s testosterone mimic like effects but also because it seems to act as a hardening agent to some degree. Many people claim to experience some additional aggression. It’s usually favored in cutting cycles.
• DHEA – DHEA is also a prohormone that converts to testosterone, but has a greater affinity to increase estrogen in males. It likely reduces evening cortisol levels (the stress hormone), which is likely one of the reasons it’s a feel good hormone. This is the cheapest option of the three.
Some people have found great success stacking two of the above mentioned compounds to create a two-sided “test base”. I’ll explain what that means exactly in a future installment, but a typical stack might be something like 1-DHEA, 4-DHEA (low dose), and Epiandrosterone (moderate dose). It keeps some estrogen in the cycle which is good for growth and recovery but also brings in the aggression and hardness that epiandrosterone can provide.