There are two types of anabolics

Class-I)These are mostly the oil-based injectibles.They work primarily by binding to and activating the androgen receptor,which then interacts with your DNA,sending out various signals to impact anabolism/anti-catabolism.
Class-II)These are primarily 17alpha-alkylated oral compounds.They,unlike their oil-based counterparts,do not bind well to the androgen receptor,and acheive their effects on growth/strength independent of this process,by binding to other types of receptors. The above study just offers some actual scientific proof into this,and sheds light on why it is beneficial at times to stack steroids from opposing groups,so as to get the maximum results through multiple pathways,as opposed to one primary mechanism.So basically it means you should stack a Test (whatever ester), a 17aa steroid, and maybe if you want some other type of Class 1 steroid. For optimal results. This is basically common sense, but good that there is scientific results to back it. Nothing puts mass on as efficiently as it,except for maybe tren.But unlike tren,testosterone only has ‘mediocre’ binding capacity to the A/R,being far outshined by deca and primo in the binding capacity department.Yet it provides much better overall growth.Why?It outshines the above aforementioned anabolics in the Class-II mechanisms,such as influences on GH,IGF-1,activation of satellite cells into full maturation,activation of prostaglandin receptors,etc. Man child-That’s exactly right.There are two steroids that possess DUAL activity(both class-I & II),and that is testosterone and tren.For this reason,they should form the base of your cycle.Tren has the strongest binding capacity to the androgen receptor of ANY steroid,therefore adding a class-I with it probably isnt necessary,as it’s more than sufficient in that department.It’s class-II activity isn’t as aggressive ,therefore adding in a class-II oral such as winstrol or dianabol would work very well.As for testosterone,,the same applies.Throw in an oral compound and a class-I,such as deca,eq,or primobolan,and you’ve got all the bases for anabolism completely covered.Now all you need is the right training stimuli,and ample nutrition,and you’re on your way to explosive growth.

Anabolic Steroids achieve their effects on hypertrophy through different mechanisms,and as such are classified into two different categories,class-I and class-II compounds.I will explain which ones work through which pathway,and how to effectively combine opposing groups to maximize potentiation of one another for explosive growth. Class-I-These are steroids who’s primary influence on anabolism is achieved through aggressive binding and activation of the androgen receptor.Examples of potent class-I’s are-Deca durabolin,primobolan,equipoise,oxandrolone. Class-II-These are compounds with potent activity independent of A/R binding/activation,and their activity has been monitored in neuron’s,microsomes,mitochondria,etc.Examples of potent class-II’s are-Anadrol,Dianabol,winstrol,Fluoxymesterone.
Then we have steroids that are potent combination steroids all by themselves(meaning they display influences on growth through both class-I and II activity,and thus are very effective as’stand-alone’anabolic agents as well as forming the ‘base’ of most steroid stacks).Two compounds possess this unique characteristic-Trenbelone and Testosterone.Either of these two steroids should form the base of most users stacks,as the cover both A/R and non-A/R mediated mechanisms,and adding to them with either a class-I or II will only potentiate that particular mechanism towards muscular hypertrophy.
Now that we’re aware of which compounds work through which mechanism, how do we combine them effectively to maximize each one’s potential?As explained above,Testosterone and trenbelone should form the base of any serious steroid stack,but great effects can be had by combining single mechanism steroids from opposing classes.

Examples:
*CUTTING*
Winstrol & Equipoise
Winstrol & Primobolan
Fluoxymesterone & Equipoise or Primobolan

*BULKING*
Deca & Dianabol
Anadrol & Equipoise or Primobolan
Winstrol & deca
And of course,using test or tren as the base compound for either cutting or bulking will only make results that much more explosive.If using test for
cutting,an anti-aromitase should be incorporated.

Main Difference of Testosterone Propionate From Other Testosterones

Testosterone Propionate - is an ester of testosterone, produced in injection form. This is not the most popular testosteron easter, since most athletes prefer him or Testosterone enanthate, or Testosterone Cypionate.


The reason of low popularity of testosterone propionate is not in its low efficiency, just the majority of athletes, bodybuilders, weightlifting or powerlifting, have not heard about this drug and its capabilities, although the results with it can be simply stunning. There is a stereotype, if medication is used by little number of people, so it is inefficient. What about in practice? Of course, to assure that Testosterone propionate is one of the best testosterones in the world would be too presumptuous, but, nevertheless, the Testosterone propionate has many advantages not possessed with better-known testosterone cypionate, testosterone enanthate and testosterone undecanoate.

One of the main differences of Testosterone Propionate from other testosterones is the duration of action. Testosterone Cypionate, Testosterone enanthate and testosterone undecanoate have a lasting impact and effect of testosterone propionate over a short-term, lasting a maximum of 1-2 days. When it comes to the use of esters intramuscularly, the duration of their action depends on the amount of injected testosterone and its species. For example 250 mg of Testosterone enanthate has effect on the body at least 1-2 weeks, 50 mg Testosterone Propionate only 1-2 days. However, it is not necessary to conclude that the difference between the drugs only in the duration of the impact of testosterone propionate and the frequency of its use. It's not all.

And Testosterone Propionate and Testosterone cypionate and enanthate has a strong androgenic effect on athletes body, which main function is building muscle mass and strength. However, the results taking propionate as obvious as action of other testosterones, but it accumulates a lot less water in the body. In short, one of the biggest drawbacks of testosterone propionate injections is need of daily injections. Shortness of testosterone propionate action on the body is not only his disadvantage, but also dignity. Since the action of the drug can be seen the next day and they are manifested in a rush of blood to the muscles and prompting the athlete to train.

As mentioned, testosterone propionate has side effects rarely, especially if used in optimal dosages. If athletes are addicted to large doses, as well as have the appropriate disposition, there is a risk of hair loss, deepening of the voice, acne. Testosterone propionate is rare cause of gynecomastia, as well as the accumulation of large amounts of fluid in the body. But do not forget taking HCG and Clomid or any other testosterone-products. Practically Testosterone propionate has no toxic effects on the liver, and the risk of damage is completely reduced to zero.