While Deca-Durabolin is the most commonly used Nandrolone based steroid it is far from the only one and in recent years the popular Nandrolone-Phenylpropionate has increased in popularity; commonly referred to as NPP and often found under the trade name Durabolin. In many ways NPP is very similar to the original Decanoate version; meaning, the nature of the hormones is for all intense purposes the same with either form. However, when examining the two compounds we have two distinct esters, one with the Decanoate ester while NPP is a Phenylpropionate ester based form. As each one carries its own ester NPP will become active in a noticeable way much faster but its total lasting effect is very short lived compared to the large ester based Nandrolone. Further, because Phenylpropionate is a smaller ester the total mass of the compound will yield more Nandrolone on a per milligram basis. At first glance this would seem to lend to NPP being slightly superior as it becomes active much faster but this isn’t necessarily true; while it will activate much faster, fast is not always beneficial, especially when we consider solidifying gains. However, in the long and short both compounds are very similar but some have said to report less water retention with the NPP form and this is common with smaller ester based steroids.
Nevertheless, real life experiences often show that the original may indeed be slightly more powerful; remember, real life and what’s on paper do not always matchup hand in hand and in the end you will have to find what works best for you.
As with all anabolic steroids Oxandrolone will suppress natural testosterone production in men. Testosterone suppression does vary from steroid to steroid in terms of the rate and Oxandrolone is one of the milder forms. However, most all men will still need some form of exogenous testosterone if they are using Oxandrolone at any significant dose for any significant time. Those who do not supplement with testosterone have an excellent chance of putting themselves into a low testosterone condition. For the purpose of information a performance level dosing of Oxandrolone will suppress natural testosterone production in most men by dropping serum testosterone levels by 50%. This will put most men into a low level state and if not certainly in a below optimal state.
Once the use of Oxandrolone is done and it along with all anabolic steroids has cleared the body natural testosterone production will begin again. It’s important to note that recovering prior natural levels assumes no prior low level condition existed and that there was no damage done to the HPTA during steroid use . Most men will need a Post Cycle Therapy (PCT) plan to aid in recovery, but they should also note that PCT will not promote full recovery. It takes several months to recover from anabolic steroid use and there’s no guarantee that you always will even with the best PCT plan in the world.