Home / Steroid Profiles / Deca Durabolin

Deca Durabolin

Updated on 28 August 2017

Sold commercially under the name of Deca Durabolin, Nandrolone Decanoate is the second most used injectable anabolic steroid after testosterone. It was first developed in the 1960’s by a company called Organon but was only approved by the FDA for human consumption in 1983 to treat many different medical conditions such as Osteoporosis. Deca is a slow acting steroid and has a half-life of around 14 days, because of this, Deca only has to be injected once or twice a week. As with Trenbolone, Deca is a 19-no compound which gives it the same progesterone side effects that are also associated with Tren.

Dosages and Cycles

Deca Durabolin is mainly used in bulking cycles, due to the effects this steroid has on the body, it would make no sense to use in a cutting cycle. It is often used at a dosage of 200 to 400mg a week, alongside Testosterone and Dianabol. Due to Deca’s long half-life, it can take up to 6 weeks to ‘fully kick in,’ this is why a fast acting steroid such as Dianabol is often used with Deca so that you can start seeing results before the Deca is fully kicked in.

Deca, Test and Dianabol Cycle:

 DianabolTestosterone CypionateDeca DurabolinNolvadex (if needed)
Week 150mg/day500mg/week300mg/week20mg/day
Week 250mg/day500mg/week300mg/week20mg/day
Week 350mg/day500mg/week300mg/week20mg/day
Week 450mg/day500mg/week300mg/week20mg/day
Week 5500mg/week300mg/week20mg/day
Week 6500mg/week300mg/week20mg/day
Week 7500mg/week300mg/week20mg/day
Week 8500mg/week300mg/week20mg/day
Week 9500mg/week300mg/week20mg/day
Week 10500mg/week300mg/week20mg/day
Week 11500mg/week300mg/week20mg/day
Week 12500mg/week20mg/day

Once the cycle is complete, make sure to follow a proper PCT protocol. The above cycle is for entertainment purposes only and is not medical advice.


  • Low Aromatization Activity: Although Deca does aromatize (convert to estrogen), it does so at a far lesser rate than most other anabolic steroids.
  • Stacking: Deca is quite a versatile compound and can be stacked with many different types of steroids.
  • Nitrogen Retention and Protein Synthesis: Deca is known to have a great impact on both nitrogen retention and protein synthesis, an increase in both of these leads to faster muscle growth.
  • Joint Lubrication: This effect is one of the reasons Deca is so popular. Many people especially powerlifters suffer from severe joint pain while lifting heavy weights, Deca helps lubricate the joints which helps take away the pain.

Side Effects

As with all steroids, Deca can give users side effects; however, most users have reported little to no side effects when using Deca at moderate dosages. Like with all steroids, no matter how mild they are, larger dosages always increase the risk of side effects.

  • Skin and hair related problems: Hair loss, abnormal hair growth, and acne are all a possibility with Deca.
  • Increased progesterone levels: An increase in progesterone levels can cause many issues, the main problem being gynecomastia. Gynecomastia caused by Deca can only be prevented by using medications such as Cabergoline. AI and SERMS will have no effect in preventing gynecomastia caused by progesterone.
  • Insomnia: Although rare, insomnia does occur in some people who use Deca.
  • Prostate enlargement: As with most steroids, prostate enlargement can occur. Usually, the prostate will go back to standard size once steroid usage has come to a halt.
  • High blood pressure: High blood pressure, as with most other steroids can occur when using Deca. Always get your blood pressure checked regularly when using steroids.
  • Water Retention: Many users have reported severe water retention when using this steroid.
  • Cholesterol levels: Deca Durabolin may increase LDL (the bad cholesterol) and lower HDL (the good cholesterol) which can cause other issues in the long run. Always monitor your cholesterol when using steroids.


With over 15 years of experience as a personal trainer, and a vast amount of knowledge on bodybuilding and anabolic steroids. My aim is to provide quality and helpful information.

Check Also

How to use HGH

There are many different ways in which to use human growth hormone, I will break ...