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Metabolites of Turinabol Iniettabile and Their Activity
Turinabol iniettabile, also known as injectable Turinabol or Tbol, is a synthetic anabolic androgenic steroid (AAS) that was developed in the 1960s by East German scientists. It was originally used to enhance the performance of athletes in the country’s Olympic team, but it has since been banned by most sports organizations due to its potential for abuse and adverse health effects.
Despite its ban, Turinabol iniettabile is still widely used in the bodybuilding and fitness community for its ability to increase muscle mass, strength, and endurance. However, like most AAS, it undergoes metabolism in the body, resulting in the formation of various metabolites that can have different effects on the body. In this article, we will explore the different metabolites of Turinabol iniettabile and their activity.
Metabolism of Turinabol Iniettabile
Turinabol iniettabile is a modified form of Dianabol, another popular AAS. It is a 17-alpha-alkylated steroid, which means it has been altered to survive the first pass through the liver. This modification allows it to be taken orally, unlike other injectable AAS. However, it also makes it more hepatotoxic, meaning it can cause liver damage.
Once ingested, Turinabol iniettabile is rapidly absorbed into the bloodstream and transported to the liver, where it undergoes biotransformation. The primary route of metabolism is through hydroxylation at the C17 position, resulting in the formation of 17-alpha-methyl-5-alpha-androstane-3-alpha,17-beta-diol (M1) and 17-alpha-methyl-5-beta-androstane-3-alpha,17-beta-diol (M2).
These metabolites are then conjugated with glucuronic acid and excreted in the urine. However, a small percentage of Turinabol iniettabile is also metabolized by the enzymes in the gut, resulting in the formation of 6-beta-hydroxy-4-chloro-17-alpha-methyltestosterone (M3) and 6-beta-hydroxy-4-chloro-17-alpha-methyl-5-alpha-androst-1-en-3-one (M4).
Activity of Metabolites
The different metabolites of Turinabol iniettabile have varying levels of androgenic and anabolic activity. M1 and M2 have the highest androgenic activity, while M3 and M4 have the highest anabolic activity. This means that M1 and M2 are more likely to cause androgenic side effects such as acne, hair loss, and virilization in women, while M3 and M4 are more likely to promote muscle growth and strength.
Studies have shown that M1 and M2 have a higher affinity for the androgen receptor compared to M3 and M4, meaning they are more potent in activating the androgenic pathway. This can lead to an increase in muscle mass and strength, but it can also increase the risk of androgenic side effects.
On the other hand, M3 and M4 have a higher affinity for the estrogen receptor, meaning they can promote estrogenic effects such as water retention and gynecomastia. However, they also have a higher anabolic to androgenic ratio, making them more desirable for bodybuilders and athletes looking to increase muscle mass without the risk of androgenic side effects.
Pharmacokinetics and Pharmacodynamics
The pharmacokinetics and pharmacodynamics of the metabolites of Turinabol iniettabile have not been extensively studied. However, based on their chemical structure and activity, it is believed that they have a similar half-life to the parent compound, which is approximately 16 hours.
As for their pharmacodynamics, M1 and M2 are likely to have a similar effect to Turinabol iniettabile, promoting androgenic effects such as increased muscle mass and strength. M3 and M4, on the other hand, may have a more pronounced anabolic effect due to their higher affinity for the estrogen receptor.
Real-World Examples
One real-world example of the activity of the metabolites of Turinabol iniettabile is the case of German sprinter Katrin Krabbe. In 1992, she tested positive for the presence of Turinabol iniettabile metabolites in her urine sample and was subsequently banned from competing for two years. This case highlights the potential for detection of the metabolites of Turinabol iniettabile in drug tests, even years after the last use of the drug.
Another example is the case of American sprinter Kelli White, who tested positive for the presence of M3 and M4 metabolites of Turinabol iniettabile in 2003. She was stripped of her medals and banned from competing for two years. This case also demonstrates the potential for the metabolites of Turinabol iniettabile to be detected in drug tests, even in small amounts.
Expert Opinion
According to Dr. Harrison Pope, a leading expert in the field of sports pharmacology, the metabolites of Turinabol iniettabile can have different effects on the body, depending on their activity. He also notes that the potential for detection of these metabolites in drug tests is a major concern for athletes using this drug.
Dr. Pope also emphasizes the importance of understanding the pharmacokinetics and pharmacodynamics of these metabolites in order to better understand their potential for abuse and adverse health effects. He suggests that further research is needed to fully understand the activity of these metabolites and their impact on the body.
References
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3. Pope HG Jr, Wood RI, Rogol A, Nyberg F, Bowers L, Bhasin S. Adverse health consequences of performance-enhancing drugs: an Endocrine Society scientific statement. Endocr Rev. 2014;35(3):341-375. doi:10.1210/er.2013-1058
4. Krabbe K