Trenbolone is a well known injectable anabolic steroid. The most powerful analog available on the market. A lot has been written about the drug, some facts scare potential consumers, but it must be remembered that negative information is not always reliable. Trenbolone is not as hard as it is sometimes portrayed, but it is definitely not a beginner drug. As a rule, it is used by advanced level athletes who are familiar with steroids.
Description and history of the drug

Trenbolone is a derivative of Nandrolone (Deca-Durabolin), a group of anabolic steroids known as the 19-nor compound (19-nortestosterone). This category is characterized by a specific molecular structure that is not characteristic of other groups, namely the absence of carbon atom 19. This difference, along with other characteristics, gives the drug androgenic power (the ability to create a stable connection with the androgen receptor) and resistance to metabolic destruction in the body.
As a result, Trenbolone exhibits androgenic and anabolic activity with an index of 500, which is five times the strength of testosterone (index of 100). The steroid shows high rates of muscle mass growth. Does not retain fluid in the body (in any concentration) due to lack of aromatization (the ability to convert to estrogen). Trenbolone has also been found to stimulate the production of the active hormone IGF-1 (insulin-like growth factor 1, IGF-1) in muscle tissues, enhancing their anabolic capabilities.
There are three main isolated forms of trenbolone:
- trenbolone acetate
- trenbolone enanthate
- trenbolone Hexahydrobenzylcarbonate
The most popular and widely used is the fast-acting acetate variety.
The history of trenbolone dates back to 1967. In France, it was synthesized by the Roussel-UCLAF pharmaceutical corporation. Over time, pharmacologists at the English company Hosescht created trenbolone in the form of an acetate ester and sold it under the brand name Finajet. In France, Roussel marketed the drug as Finaject. In fact, both firms belonged to the German company Roussel AG. Both brands of the same product (trenbolone acetate) were supplied to the human prescription drug market, but were discontinued in the 1980s as obsolete substances. Trenbolone hexahydrobenzylcarbonate was branded as Parabolan, but soon ran into a similar problem and was banned in the 1990s.
Today, Tren is legally used as a veterinary drug designed to stimulate growth in livestock. However, for the medical community it is still of special interest. Scientific research on trenbolone continues, scientists are discovering new areas of application and recommend returning to the practice of using the drug for medical purposes. However, trenbolone has not yet received FDA approval and is not officially approved for human use. For this reason, all Trenbolone available on the market is manufactured by clandestine laboratories.
Chemical Characteristics of Trenbolone

Trenbolone is a derivative of Nandrolone but has significant differences in strength and effect. Both substances belong to the 19-nor or 19-nors (short for 19-nortestosterone) class of anabolic steroids. They do not contain in their structure the 19 carbon atom characteristic of testosterone and all other anabolic steroids, which significantly changes the range of properties, making it a progestin, which we will discuss below.
The missing 19th carbon atom, which is actually a complete methyl group, is replaced in trenbolone by a double bond between the adjacent 19th carbon atoms. This distinguishes trenbolone from nandrolone, in which instead of atom 19 there is not a double bond, but a single hydrogen atom. It is the lack of the 19th carbon atom that makes the compound highly resistant to the aromatase enzyme and, as a result, stable to any conversion of estrogen. However, these are not all the features of Trenbolone chemical aromatization processes. The steroid is also characterized by a special modification at carbon atoms 19 and 11: hydrogen is separated from them, and the missing bond between neighboring atoms in the cycloalkali rings is replaced by a double one. This is what gives trenbolone not only resistance to aromatization, but complete immunity to the aromatase enzyme, and also gives trenbolone increased androgenic potency (the ability to create a stable connection with the androgen receptor) and resistance to metabolic destruction in the body.
Trenbolone Properties

All the above features s of the chemical composition make trenbolone an androgen and a stronger anabolic than its predecessor, nandrolone, and more potent than testosterone. The hormone testosterone is the model by which all anabolic steroids are measured and compared. It is like the Celsius scale, where the degree of boiling and freezing of water is used. used as the reference temperature standard. It is possible to evaluate in the future the anabolic and androgenic power of Trenbolone comparing it with Testosterone. Testosterone has an anabolic and androgenic index: 100, Trenbolone: 500. The double bond of carbon atoms 19 and 11 makes Trenbolone five times more powerful than Testosterone. For a better understanding, we can say that 200 mg of Trenbolone corresponds to 1000 mg of Testosterone, and 500 mg is equivalent to 2500 mg.
This demonstrates an extremely important fact (that everyone should remember): Trenbolone is an anabolic steroid of exceptional strength, the most powerful in existence and available. The figures above show that impressive and long-term results can be achieved with small doses. Trenbolone is a short cut to achieve the desired effect.
Regarding metabolic processes, as mentioned above, Trenbolone is absolutely resistant to the aromatase enzyme responsible for converting androgens to estrogens. It has zero estrogenic activity and cannot be converted to estrogen. Trenbolone is also completely resistant to the 5-alpha reductase enzyme responsible for reducing testosterone to the more potent androgenic dihydrotestosterone (DHT). It does not interact with the enzyme 5-alpha reductase and cannot be converted to DHT. However, we must not forget that trenbolone itself is a hormone with an androgenic index – 500, against the testosterone index – 100.
The factors that allow Trenbolone to be a versatile steroid are the extreme strength of the anabolic nature, coupled with the inability to transform into estrogen. All this allows you to provide a significant increase in strength and muscle volume, and also contributes to active fat burning, destroying the myth that trenbolone is used only for weight loss and / or drying before the competence. Similar rumors are spread among anabolic steroid users by those who have not studied trenbolone and its spectrum of action. But this proves once again that Trenbolone should not be used in high doses, especially for beginners.