Other names: Nandrolone, Nandrolone Decanoate, Nortestosterone Decanoate, Nandrolone Phenylpropionate, Deca-Nandrobolin 250, Retabolil.


Deca-Durabolin is the brand name and trade name of the anabolic steroid Nandrolone. Specifically, Deca-Durabolin is the brand name for nandrolone decanoate, a variation of the nandrolone decanoate ester.

“Deca” est le nom officieux du médicament dans le monde de la musculation, l’un des trois principaux stéroïdes anabolisants, et est le deuxième stéroïde anabolisant le plus populaire et le plus utilisé. En premier lieu n’est autre que Dianabol (Methandrostenolone), en troisième place est Winstrol (Stanozolol). Il y a une bonne raison pour laquelle Deca-Durabolin est si populaire auprès des culturistes et des athlètes, et est même très apprécié par l’establishment médical.

Nandrolone decanoate is one of the first developments in the field of anabolic steroids, introduced to the scientific community in 1960 and a few years later, in 1962, it was launched in the prescription drug market under the name Deca -Durabolin. The drug was developed by Organon.

At the same time, few people know that nandrolone existed in 1957, in the form of a fast-acting ester variant, nandrolone phenylpropionate, which gained popularity. But, due to its short half-life (requiring at least daily injections), its use was limited.Following this, nandrolone was reinvented as Deca-Durabolin with a decanoate ester attached. For this reason, Nandrolone Decanoate has a longer half-life of around 15 days, while Nandrolone Phenylpropionate has a half-life of around 4 days.

Over time, the drug began to be widely used by medical institutions as a medicine, and also gained popularity among athletes, due to its supposedly “mild” nature. There is some truth in this, but there are myths and misunderstandings, which we will discuss below.

Testosterone’s anabolic rating is 100, while Deca’s is 125, which means Deca is slightly stronger than testosterone. However, Deca has a low androgenic rating of 37, which is favorable for people who are hypersensitive to androgenic side effects. Additionally, nandrolone has very low estrogenic activity and binds very little to the aromatase enzyme, which is responsible for converting androgens to estrogen. Compared to testosterone, only about 20% of nandrolone converts to estrogen, and that’s because Deca is a progestin (like all 19-nortestosterone compounds).

Deca is classified as a 19-nortestosterone compound, due to the absence of the carbon at position 19 (which testosterone has), which makes it a progestogen. This can present potential side effects and issues that are unique to 19-nortestosterone compounds and unseen by most other anabolic steroids.

Here we must pay special attention to the popular claim that Deca-Durabolin is good for joints and bone tissue, and it is true. However, the proposed explanations circulating among athletes and bodybuilders as to why this is so are often myths and misconceptions. Deca does not “lubricate joints”, “store water in connective tissue and joints” or any other ridiculous nonsense. In fact, nandrolone promotes a significant increase in collagen synthesis more than most other anabolic steroids. Deca contribue également à une augmentation significative de la teneur en minéraux dans les os. Qu’est-ce que tout cela signifie pour l’athlète? Cela signifie que les culturistes et les athlètes peuvent ressentir des effets positifs sur les tissus articulaires et conjonctifs, en les renforçant pendant la croissance musculaire, les gains de force et les gains de masse. deca steroids side effects Cela leur donne la capacité de soulever des poids lourds avec une meilleure récupération osseuse et ligamentaire, ainsi qu’une meilleure résistance aux contraintes articulaires et osseuses résultant d’exercices intenses et de musculation.

Side effects

As stated above, when it comes to side effects, Deca is often referred to as a very “mild” anabolic steroid compared to other compounds. Unfortunately, it’s a mix of fact and fiction to be reckoned with, and most claims that “Deca is a mild steroid” date back to a time when little was known about these drugs. Deca-Durabolin is in all respects a mild and harsh anabolic steroid that has both properties.

The good news is that Deca-Durabolin has a very low level of estrogen aromatization, which makes estrogenic side effects less of a problem compared to other anabolic steroids. But, users should understand that estrogenic side effects do not disappear completely, but rather become more manageable. Manifestations of side effects include swelling, fluid retention, increased blood pressure due to fluid retention, and gynecomastia.

Tous les problèmes liés à la progestérone et à la prolactine peuvent se manifester par des mamelons gonflés, une gynécomastie, des ballonnements, etc. Les anti-œstrogènes et les inhibiteurs de l’aromatase sont connus pour être efficaces dans la lutte contre ces effets secondaires. Par exemple, Arimidex, qui est le nom de marque d’Anastrozole, ou Clomid, également connu sous le nom de Clostilbegit. La cabergoline et la bromocriptine sont également très efficaces pour abaisser les taux élevés de prolactine et sont souvent la première ligne de traitement pour cela.

Nandrolone is not a C17-alpha-alkylated (C17-aa) oral anabolic steroid and therefore has no effect on the liver. Deca exhibits a low degree of androgenic effects, which still need to be monitored and taken into account. Androgenic side effects may include increased acne, oily skin, increased body and facial hair growth, increased risk of male pattern baldness, and increased risk of benign prostatic hyperplasia.

Nandrolone suppresses endogenous testosterone. In individual use, 100mg of Nandrolone can lead to a complete shutdown of the natural anabolic hormone, so it is very important to use Nandrolone in combination with Testosterone Enanthate or Testosterone Cypionate, or, corny, with mixtures of Testosterone. This will ensure that there is no risk of cutting off and suppressing endogenous testosterone supply. After completing the course, it is mandatory to undergo PCT (recovery from a course of steroids), but remember that restoring the natural state of the body takes time.

If you do not fully understand the basic principles of taking anabolic steroids, you can cause enormous damage to the body, which may be irreversible.

Regarding the liver, nandrolone is not hepatotoxic.

Cycle and application

Naturally, bodybuilders and other athletes use Deca-Durabolin to increase volume, mass and strength. This is partly due to its positive and beneficial effects on connective and bone tissue, providing a faster healing rate and additional injury prevention when using more weight and more intense physical activity.

Since Deca-Durabolin is a long-acting nandrolone ester variant (with a half-life of 15 days), Deca-Durabolin cycles should last at least 12 weeks. Here it is often combined with long ester analogues such as Testosterone Cypionate. Due to its long-acting nature, most users won’t feel it “turn on”, at least not in the first few weeks of the cycle. And it is during this period that many people connect additional drugs to the Deca-Durabolin cycle for overclocking. It is usually any oral anabolic steroid like Dianabol, Winstrol, Anadrol, Turinabol, etc. However, for bulk and strength gains, most people tend to take drugs that are generally suitable for these purposes, such as Anadrol (oxymetholone) or Dianabol. (Methandrostenolone), for the first 4-6 weeks. These compounds are used for their bulking properties, which lend themselves very well to Deca-Durabolin and Testosterone.This is where the typical cycle combination – Testosterone / Deca / Dianabol – is often discussed. Simply put, this is the most popular curl stack of all time. This combination was originally invented and popularized by the golden age bodybuilders of the 1960s and 1970s. Recommended for all levels of users (beginners, advanced and professionals) as it is versatile in delivering a kick of quality to any user regardless of the weight of your experience.