Deca vs. NPP

Nandrolone Decanoate, also known as Deca Durabolin (or just Deca), is a historic anabolic androgenic steroid (AAS). Ever since the 1950s, Deca has been a popular anabolic steroid, and, to this day, it remains a staple in the cycles of many bodybuilders.

Deca Durabolin has an anabolic androgenic ratio of 125:37, scoring slightly higher than testosterone in the anabolic category. As a result, due to its ability to put on weight and size, deca durabolin became a favorite for many bodybuilders on bulking cycles. In fact, in the bodybuilding world deca is often considered to be a “wet” compound, meaning that some of the gains from the drug are in the form of water and not lean muscle mass.

Over the last few years, a compound very similar to Deca Durabolin has become extremely popular: Nandrolone Phenylpropionate, or NPP for short.

nandrolone decanoate chemical formula

Fig 1. Nandrolone Decanoate Chemical Formula

Table of Contents

NPP vs. Deca


Basically, Nandrolone Phenylpropionate (NPP) is a much shorter acting ester of deca durabolin. As we know, the chemical name of deca is Nandrolone Decanoate. Hence, it is Nandrolone attached to the decanoate ester. This particular ester takes anywhere from 1 to 2 weeks to get fully absorbed by the bloodstream, which is why the effects of deca take a while to peak and “kick in”.

Similarly, NPP is a nandrolone, but in this case, it is attached to a Phenylpropionate ester. It takes roughly 3-5 days for this ester to get fully absorbed. Therefore, the phenylpropionate ester is a little slower than the common propionate ester, yet it is still faster than the enanthate ester

Nandrolone Phenylpropionate (NPP)

Fig 2. Nandrolone Phenylpropionate (NPP) Chemical Structure

Uses of NPP and Deca


So, how do you choose between a cycle with Deca or NPP?

Since deca durabolin is such a long ester, and it takes a much longer time to kick in, it would be a better choice to stick with deca on bulking cycles ranging from 12 to 16 weeks. Deca is usually injected twice a week to maintain stable blood levels. In fact, deca is one of the hardest anabolic steroid to recover from, mostly due to its long ester and half life.

On the other hand, NPP is should be injected every other day, making it a wiser choice for shorter cutting cycles, where shorter esters are often recommended. The reason NPP is preferred in cutting cycles is because it starts acting faster than deca and will clear out of the system much faster. Furthermore, NPP is optimal for cutting cycles because usually it gives less water retention and bloating than deca does. This is critical when cutting, as bloat and water weight can have a negative impact on a desired lean physique.

Similar logic is followed when bodybuilders run short cutting cycles using Testosterone propionate versus a longer esters such as enanthate or cypionate.

Gains from Deca and NPP


  • Dramatic strength increase
  • Increase in muscle mass and endurance
  • Increase red blood cell count
  • Increase collagen synthesis/alleviate joint pain

Side Effects of Deca and NPP


Remember, both Deca and NPP will cause natural testosterone suppression. Hence, one will need to compensate with a testosterone base on cycle. Estrogen levels should also be controlled during cycle with such an Aromatase Inhibitor as Aromasin. Furthermore, since both of these compounds are nandrolones, it is recommended to have cabergoline on hand or ready to be ordered, so you can control possible elevated prolactin levels.

These are some of the side effects of Deca and NPP

  • Natural testosterone suppression/ “Deca Dick”
  • Elevated blood pressure/cholesterol
  • Elevated pressure on organs
  • Acne
  • Bloating

Cutting cycle using NPP


W

Testosterone

Propionate

NPP

Masteron

Winstrol

Cardarine

N2Guard

1

150mgs/EOD

100mgs/EOD

100mgs/EOD

20mgs/ED

7caps/ED

2

150mgs/EOD

100mgs/EOD

100mgs/EOD

20mgs/ED

7caps/ED

3

150mgs/EOD

100mgs/EOD

100mgs/EOD

20mgs/ED

7caps/ED

4

150mgs/EOD

100mgs/EOD

100mgs/EOD

20mgs/ED

7caps/ED

5

150mgs/EOD

100mgs/EOD

100mgs/EOD

50mgs/ED

20mgs/ED

7caps/ED

6

150mgs/EOD

100mgs/EOD

100mgs/EOD

50mgs/ED

20mgs/ED

7caps/ED

7

150mgs/EOD

100mgs/EOD

100mgs/EOD

50mgs/ED

20mgs/ED

7caps/ED

8

150mgs/EOD

100mgs/EOD

100mgs/EOD

50mgs/ED

20mgs/ED

7caps/ED

9

150mgs/EOD

100mgs/EOD

100mgs/EOD

50mgs/ED

20mgs/ED

7caps/ED

10

150mgs/EOD

100mgs/EOD

100mgs/EOD

50mgs/ED

20mgs/ED

7caps/ED

*Aromasin is used as an AI @ 12.5mgs/ED

 

Bulking cycle using Deca Durabolin


W

Testosterone

Cypionate

Deca

Durabolin

Dianabol

Ostarine

N2Guard

1

400mgs/week

600mgs/week

50mgs/ED

25mgs/ED

7caps/ED

2

400mgs/week

600mgs/week

50mgs/ED

25mgs/ED

7caps/ED

3

400mgs/week

600mgs/week

50mgs/ED

25mgs/ED

7caps/ED

4

400mgs/week

600mgs/week

50mgs/ED

25mgs/ED

7caps/ED

5

400mgs/week

600mgs/week

50mgs/ED

25mgs/ED

7caps/ED

6

400mgs/week

600mgs/week

50mgs/ED

25mgs/ED

7caps/ED

7

400mgs/week

600mgs/week

50mgs/ED

25mgs/ED

7caps/ED

8

400mgs/week

600mgs/week

50mgs/ED

25mgs/ED

7caps/ED

9

400mgs/week

600mgs/week

25mgs/ED

7caps/ED

10

400mgs/week

600mgs/week

25mgs/ED

7caps/ED

11

400mgs/week

600mgs/week

25mgs/ED

7caps/ED

12

400mgs/week

600mgs/week

25mgs/ED

7caps/ED

13

400mgs/week

600mgs/week

25mgs/ED

7caps/ED

14

400mgs/week

600mgs/week

25mgs/ED

7caps/ED

Forums


Want to read about Deca and NPP on our forums? check out these threads:

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