NPP Nandrolone Phenylpropionate

Active substance: Nandrolone Phenylpropionate
Duration of the cycle: 4-8 weeks
Dosage: 50-150 mg every day
Administration: intramuscular (injection)
Action: mass with good definition
Side effects: elevated blood pressure, intensification of male features in women

NPP, or Nandrolone Phenylpropionate for short, is a type of nandronolone with a short half-life of only about 48 hours.
NPP is an injectable anabolic-androgenic steroid that differs from Propionate in that it allows you to build muscle mass with a better definition.

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The muscle mass that NPP makes possible to achieve is of good quality – first of all,
it is devoid of excess amounts of fat due to the lack of water retention,which does not occur with NPP.
This is because the steroid has relatively strong anabolic properties and weak androgenic properties,
which makes it perfect for beginner bodybuilders and women.
Its action is not as intensive as that of other steroids with a prolonged half-life.
Its other application involves combining it with other, stronger doping agents,
such as Trenbolone, Testosterone Propionate, Dianabol or Stanozolol.


A single dose is 50-150 mg daily or every two days (depending on the stage of advancement) for men and 50 mg daily for women. The optimal duration of taking NPP is 6 weeks, although there will be no adverse consequences if this duration is extended to 8 or reduced to 4 weeks. However, it should be borne in mind that NPP limits the natural production of testosterone, so after the end of the cycle, you should take Nolvadex or Clomid in combination with HCG to restore the normal hormonal balance.

One disadvantage of NPP is the need for frequent injections – in practice it is not uncommon for injections to be administered every day. As the entire cycle can take up to a year, this requires many sacrifices on the bodybuilder’s part. Another disadvantage of NPP is its low availability – its high price combined with low concentrations makes the use of this agent in bodybuilding unaffordable and often pointless.

Side effects

On the other hand, an advantage of NPP that is especially important from the point of view of beginner bodybuilders is the low probability of side effects. As this steroid is characterized by low androgenicity, there are practically no unwanted effects that occur with other anabolics – baldness, gynecomastia, increased body hair, acne and oily skin. Rarely, however, you may experience elevated blood pressure and intensification of male features in women.