NANDROLONE – EFFECTS, PROPERTIES, SIDE EFFECTS, AND RISKS
Nandrolone is one of the most widely known anabolic-androgenic steroids (AAS) and has been recognized in bodybuilding and competitive sports for many decades. Chemically, it is a synthetic derivative of testosterone, also referred to as 19-nortestosterone.
Nandrolone possesses both anabolic and androgenic properties. While the anabolic effect is associated with the development and maintenance of muscle tissue, androgenic effects can influence the reproductive system, skin, and hair growth, among other areas. A complete separation of these two effects is biochemically impossible.
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What is Nandrolone?
Nandrolone is an anabolic-androgenic steroid that is structurally closely related to testosterone. The chemical name 19-nortestosterone indicates that Nandrolone differs structurally from testosterone: at position 19, the methyl group present in testosterone is missing.
The chemical formula of Nandrolone is:
C₁₈H₂₆O₂
The molar mass is approximately 274.4 g/mol. The substance is also known under the names 19-nortestosterone, norandrostenolone, and 19-norandrostenolone.
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The Structure of Nandrolone
Nandrolone features the typical four-ring steroid backbone. Characteristic elements include a keto group at position 3 and a hydroxy group at position 17.
The structure differs from testosterone specifically due to the absence of the C19 methyl group. This seemingly minor structural modification significantly alters the pharmacological properties of the molecule.
* Chemical Formula: C₁₈H₂₆O₂
* Molar Mass: 274.4 g/mol
* CAS Number: 434-22-0
* Synonym: 19-Nortestosteron / 19-nortestosterone
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How Does Nandrolone Work?
Like other anabolic-androgenic steroids, Nandrolone binds to the androgen receptor. AAS enter the target cells, where they influence gene expression via the androgen receptor. This can impact processes related to protein synthesis, muscle tissue development, and other androgen-dependent functions.
In the context of non-medical use, Nandrolone is frequently associated with the following desired effects:
* Increase in muscle mass
* Improvement in strength performance
* Support for muscle growth
* Enhancement of physical performance
However, these effects do not mean that application outside of a medical indication is safe for human health.
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Nandrolone in Bodybuilding
Nandrolone became particularly famous in bodybuilding because it was used as a performance-enhancing and muscle-building steroid. The substance and its esters are therefore frequently mentioned in discussions regarding so-called "bulking phases" and performance-enhancing substances.
A clear distinction should be made between medical application and non-medical use in sports. The use of AAS in high, non-therapeutic quantities is associated with significant health risks. Scientific reviews describe modifications to the cardiovascular system, blood lipids, hormone production, and sexual function.
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Nandrolone and Nandrolone Decanoate – What is the Difference?
Nandrolone is the actual active substance. In pharmaceuticals, however, an ester of Nandrolone is frequently utilized.
A well-known example is Nandrolone Decanoate. Esters alter the pharmacokinetic behavior of the substance. Nandrolone Decanoate is used as an active substance form to provide a longer-lasting depot effect.
Therefore, these are not two entirely different steroids:
* Nandrolone ➔ Active Substance
* Nandrolone Decanoate ➔ Ester of Nandrolone
Other Nandrolone esters are also known. The respective ester structure specifically influences the release and duration of the active substance within the body.
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Medical Application
Nandrolone preparations were and are used medically in specific situations. The approved indication depends on the respective preparation and the country of distribution.
For instance, Nandrolone Decanoate is approved in the United States, according to the official prescribing information, for the treatment of anemia associated with renal insufficiency. This treatment can lead to an increase in hemoglobin and red blood cell mass.
Medical application must always occur under professional medical supervision. The fact that an active substance can be used medically does not automatically imply that its use for muscle building is medically useful or approved.
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What Side Effects Can Nandrolone Cause?
Potential side effects are an essential component of any objective assessment of Nandrolone.
Potential androgenic and anabolic side effects include:
* Suppression of endogenous testosterone production
* Alterations in libido
* Limitations in testicular function
* Decreased sperm production
* Erectile dysfunction
* Acne
* Hair loss in cases of corresponding genetic predisposition
* Development of breast tissue (Gynecomastia)
* Water retention
* Changes in blood lipid values
* Alterations in blood pressure
In women, virilization symptoms can additionally occur. These include a deeper voice, increased body hair, and changes to the clitoris. Some of these modifications can remain permanent.
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Cardiovascular Impacts
A particularly critical aspect regarding anabolic steroids concerns the cardiovascular system.
AAS can unfavorably alter the ratio of LDL and HDL cholesterol. Long-term abuse has furthermore been linked to high blood pressure, modifications of the heart muscle (cardiac hypertrophy), arteriosclerosis, and other cardiovascular problems.
The risk depends, among other factors, on the specific substance, duration, exposure, individual health factors, and the simultaneous use of other compounds.
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Impact on Endogenous Hormone Production
A frequently underestimated problem is the suppression of the natural hormonal axis.
Exogenously administered anabolic-androgenic steroids influence the body's own production of sex hormones. In men, this can lead to reduced testosterone production, a decrease in sperm production, and testicular atrophy.
Following cessation of use, endogenous hormone production may recover. However, the speed and completeness of this recovery are highly individual and never guaranteed.
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Is Nandrolone Hepatotoxic?
Nandrolone is frequently evaluated differently than certain orally active, 17-alpha-alkylated steroids. However, it should not be concluded that Nandrolone generally carries no risks for the liver.
Prescribing information for Nandrolone Decanoate highlights potential serious hepatic complications within the class of anabolic steroids. Clinical descriptions include peliosis hepatis and hepatic tumors.
The risks of a steroid cannot be judged solely by whether it is administered orally or via injection.
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Nandrolone and Women
For women, the application of Nandrolone is particularly problematic, as even minor androgenic effects can lead to virilization.
Potential modifications include:
* Deeper voice
* Increased body and facial hair growth
* Acne
* Alterations in menstruation
* Enlargement of the clítoris
* Male-pattern baldness
A portion of these changes can remain permanent even after discontinuing use. During pregnancy, a particular risk exists for the development of the unborn child. Nandrolone is therefore strictly contraindicated during pregnancy.
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Nandrolone in Doping
Nandrolone belongs to the classic doping substances. The World Anti-Doping Agency (WADA) lists Nandrolone under the anabolic-androgenic steroids of category S1. These substances are strictly prohibited in sports both in-competition and out-of-competition.
Furthermore, Nandrolone is analytically highly trackable via advanced urine and blood tests over an extended period, as its metabolites (such as 19-norandrosterone) possess a significant duration of retention in human tissue.
