Trenbolone (Trenbolone Acetate)

Overview & History

History & Overview of Trenbolone

When it comes to the best-known injectable steroids on the market, Trenbolone ranks toward the top. It is the most powerful anabolic steroid milligram for milligram, and it’s available both conventionally and commercially. Those who read about it find themselves either intimidated or amazed. However, the simple truth is that Trenbolone is nowhere near as harsh as many individuals claim it to be, it is definitely not a compound for beginners and serious consideration should be made before deciding to use it. In the majority of situations, it is most commonly used by advanced and intermediate steroid takers who have performed at least several cycles and built experience with anabolic steroids.

Trenbolone is a Nandrolone derivative, Nandrolone is also known as Deca Durabolin and belongs to the 19-Nor compound anabolic steroid family. 19-Nor gets its name from the alteration of Nandrolones modified molecular structure. The 19th carbon is removed, which makes it unique and unseen throughout all the other classes of anabolic steroids. There are also various other alterations that contribute to the androgenic strength being enhanced. The enhanced strength allows it to bind with the androgen receptor much more strongly than other anabolic steroids do. It also possesses a higher degree of metabolic breakdown resistance once it enters the body.

Looking at the anabolic and androgenic strength of Trenbolone when compared to testosterone, it has a rating of 500 for each of them. Testosterone sets the benchmark with anabolic and androgenic strength of 100. This makes it easy to see just how potent Trenbolone actually is as an anabolic steroid. Trenbolone characteristics make it easy to promote the onset of weight gain, of which nearly all is lean muscle mass. Very little water retention is experienced with Trenbolone use. Aside from the above noted benefits, it also endogenously stimulates the muscle tissue to produce insulin like growth factor 1, also known as igf-1. Bloating and water retention are avoided due to modifications of the chemical structure that prevented from being aromatized into estrogen, regardless of how much Trenbolone is being used.


Taking a closer look at Trenbolone, there are three different esterified forms available. These are Trenbolone hexahydrobenzylcarbonate, Trenbolone enanthate and Trenbolone acetate. By far the most popular of the three Trenbolone variants is Trenbolone acetate. The history of Trenbolone started in late 1966, early 1967 when Roussel UCLAF performed repeated studies on it. Eventually, Hosescht of England began to manufacture Trenbolone acetate, marketing and selling it as Finajet come out while in France it was given the brand name of Finaject. In reality, the two companies were operated and owned by Rousell AG, a German company.

Both of the Branded versions Trenbolone acetate were used as human grade medicines available on the prescription drug market. Use as a human great medicine was discontinued before the start of the 1980s. Parabolan what’s the brand name for Trenbolone hexahydrobenzylcarbonate come on which was also discontinued in the 1990s. Looking at Trenbolone used today, it is an official drug used in the veterinary industry. For the most part, it is utilized as a means of increasing body mass in cattle for human consumption. It is still extremely popular within the medical industry and studies continue to be performed on Trenbolone. More and more uses and applications are being found for it. However, the FDA still classifies it as an unapproved compound for human usage and nearly all Trenbolone products of today typically come from underground laboratories.

Trenbolone Chemical Characteristics

As we touched upon at the start of this Trenbolone guide, it is essentially a Nandrolone derivative that possesses some major differences in its strength and chemical properties. Both Nandrolone and Trenbolone belong to be anabolic steroid class known as 19 Nor compounds. They are given this name due to the fact that the nineteenth carbon of their chemical structure is lacking. This carbon can be found on all other anabolic steroids apart from those that are classified as 19 nor anabolic steroids. These include Trenbolone and Nandrolone. The change of the chemical structure makes it a progestin. We will take a closer look at this little bit farther on in the article.

The carbon atom missing at the 19th position in Trenbolone is replaced with 2 double bonds to the 2 atoms that missing atom was bound to. This makes it different to Nandrolone, which replaces the 19th carbon with a hydrogen atom instead. It is because of the 19th carbon being eliminated why 19-nor compounds are able to resist aromatase enzymes, therefore it possesses resistance to estrogen conversion. However, it is important to note that this isn’t the end of the story when it comes to Trenbolone and aromatization. Modifications of the carbons in position 11 and 19 result in hydrogen atoms being removed from each position. This results in the carbons in position 11 and position 19 to become double bonded to the atoms neighboring them. It is due to these modifications that Trenbolone is not only able to resist aromatization, but it is unable to interact with aromatase enzymes and is completely immune to it. It is also why Trenbolone has a hugely increased androgenic strength and is able to resist metabolic breakdown once it enters the body.


Trenbolone Properties & Effects

All of the modifications to the chemical structure of Trenbolone as noted above are what makes it such a potent anabolic and androgenic than its parent hormone, Nandrolone. In fact, it is also much stronger than testosterone. Testosterone is what all other anabolic steroids are compared against and sets the baseline for their ratings. The androgenic and anabolic rating of testosterone is 100 for each of them. Trenbolone on the other hand has an androgenic and anabolic rating of 500 for each of them. This, in effect, means that Trenbolone is considered to be five times more powerful than testosterone. To help improve understanding, anyone considering using Trenbolone should understand that 1000 mg of testosterone would have to be administered to achieve the same strength provided by 200 mg of Trenbolone. To further clarify this, any testosterone user looking to match the strength of a 500 milligram dosage of Trenbolone would need to inject 2500 mg of testosterone to achieve this.

Trenbolone Acetate 100mg/ml

This serves to highlight just how strong Trenbolone actually is when it comes to anabolic steroids. The numbers above highlight the fact that only small doses of Trenbolone are required to experience impressive changes of the physique and performance. Looking at the metabolization of Trenbolone, it possesses complete resistance to aromatase enzymes. It is these enzymes that convert aromatizable androgens into estrogen. Regardless of the dosage size of Trenbolone, it is unable to be converted or metabolized into estrogen. Looking at the 5 Alpha reductase enzyme, it also possesses 100% resistance. 5 Alpha reductase is the enzyme that reduces testosterone into DHT, also known as dihydrotestosterone. While it cannot be converted into dihydrotestosterone, it should be remembered that Trenbolone is an extremely androgenic hormone in its own right.

The fact that Trenbolone is able to resist aromatization into estrogen, while affording the individual extremely strong anabolic properties is what makes Trenbolone one of the most flexible and versatile anabolic steroids around. It is able to provide astounding gains of strength and lean mass while also being useful for fat loss and cutting phases too. All of the information that we have covered so far makes it clear that there is no need to use Trenbolone in high doses to see results. And this is even true or if the individual has never used Trenbolone before.

Side Effects

The Side Effects of Trenbolone

Trenbolone is one of the most powerful androgens available. It also forms a strong bond with the androgen receptor. This is both a positive and a negative. Many people are scared to use Trenbolone due to the number of stories floating around about it possessing strong and harsh side effects. The first thing to point out is that estrogenic side effects will not be experienced when using Trenbolone due to its resistance to aromatization. However, androgenic side effects are of a concern for many people, and Trenbolone can possess side effects not usually experienced with other types of anabolic steroid.

Androgenic side effects include an increase of oil production, acne, increased growth of the facial and body hair, male pattern baldness to those predisposed to it and an increased risk of developing BPH, also known as benign prostatic hyperplasia. Another side effect that many find off-putting is the risk of developing aggressive behavior. The way in which the individual is able to handle the side effects is what determines whether it is worth using or not. As Trenbolone is resistant to 5 Alpha reductase enzymes, 5 Alpha reductase Inhibitors, including Propecia, Dutasteride, Finasteride and Proscar cannot help control side effects.

There are also side effects associated with Trenbolone that are not seeing with other anabolic steroids. For the most part, these include insomnia and increased sweating. The reason why the side effects occur is still unknown. Trenbolone also possesses 60% of progesterones strength. This is because it is a progestin itself. Therefore, side effects associated with progesterone may also be experienced. Trenbolone metabolites are able to bond strongly with progesterone receptors along with increasing the levels of prolactin found in the body. Side effects may present themselves in a way similar to estrogen related side effects. These include bloating, gynecomastia and puffy nipples.

To control the side effects, aromatase inhibitors (His) and anti-estrogens can help. For side effects associated with prolactin, studies have shown that 400 mg of vitamin B6 on a daily basis can help. Anti prolactin drugs including bromocriptine and cabergoline are also able to effectively lower the levels of prolactin found in the body. In fact, they are typically the first line of treatment. Trenbolone also possesses side effects commonly associated with all types of anabolic steroid. These include negative effects on the cardiovascular system and the disruption and shut down of the hypothalamic pituitary testicular access. It will also rapidly lead to the onset of natural testosterone production to cease, even with low doses.

Cycling & Uses

Uses & Trenbolone Cycles

Using Trenbolone as part of a cycle is extremely effective for building muscle mass or losing body fat. Trenbolone is known to attach itself to the catabolic hormone receptors, thus blocking two hormones ability to send catabolic signals to the cells in the muscles. This makes it extremely effective at inhibiting cortisol. It is also an excellent choice when it comes to cutting cycles, especially situations where catabolism becomes an issue, such as pre-contest phases and dieting. Trenbolone has also been shown to possess potent nutrient partitioning effects, making it effective for fat loss. Fat cells contain Androgen receptors, and when activated, assist with fat loss.

The ability of Trenbolone to increase muscle tissue nitrogen retention is one of the main reasons why individuals choose to use them. When using Trenbolone for bulking, it is typically stacked with testosterone enanthate or another variant of testosterone used for bulking. Other options include orally administered Dianabol or injectable boldenone. For cutting purposes, Trenbolone acetate is typically used in a stack containing testosterone propionate. Most individuals run the cycle for 8 to 10 weeks.

Administration & Dosages of Trenbolone

Trenbolone is one of the few anabolic steroids where using large doses is unnecessary. The fact that Trenbolone possesses five times the androgenic and anabolic strength of testosterone means that small doses can provide big results. Even moderate doses are not required as a little bit of Trenbolone goes a long way. Looking at the dosage of Trenbolone, the majority of individuals find that 50 mg administered every other day is typically sufficient. This equals approximately 200 milligrams each week and well prevent muscle loss from occurring during a cutting cycle.

A moderate dose of Trenbolone is considered to be between 75 and 100 mg every other day. This equals approximately 300 mg to 400 mg each week and provides huge changes to the physique. Advanced uses typically stick to the moderate dose of Trenbolone due to its strength. It is important to note that the higher the dosage of Trenbolone is, the more likely uncomfortable side effects are to arise. Looking at the extreme end of the scale, it is extremely rare for even the most advanced user to use more than 400 mg to 600 mg of Trenbolone each week.

Buying & Legality

Buying Trenbolone & Legality

As Trenbolone is no longer manufactured for human use, the only way you can purchase it is on the black market from an underground lab. There are zero pharmaceutical companies with FDA approval manufacturing Trenbolone. Therefor, any company advertising FDA approved Trenbolone should be avoided at all costs as it is going to be a counterfeit. Considering the capabilities and strength provided by Trenbolone, it actually works out to be reasonably affordable for those purchasing it online.

As a general guideline, a 10ml vial of Trenbolone acetate will cost anywhere between $60 and $100. However, the majority of Trenbolone acetate is priced at between $75 and $80. A 10 ml vial normally contains 75 mg per ml or 100 mg per ml. On the other and, a 10ml vial of Trenbolone enanthate will typically cost between $90 and $130 for a concentration of 200 or 250 mg per ml.

When purchasing steroids from unknown sources online, due care should always be taken. While there are many reputable underground labs manufacturing Trenbolone, there will always be those out to scam you. As underground labs have little to no regulation, contamination is always a possibility. You also run the risk of purchasing a substance that contains no Trenbolone, or worse, something that could be potentially fatal. Exercising caution is a must and if something seems too good to be true, it normally is.

The final thing to be aware of is the legality of possessing or using Trenbolone in your country of residence. In some countries, including the Middle East, Africa and parts of Asia, it is unregulated and uncontrolled. However, in other countries such as the United States, the United Kingdom and Canada, the steroid is only allowed for animal use. Therefore, to legally import Trenbolone into these countries, you would need to be a valid veterinarian. Importing banned or controlled substances can have extremely severe consequences ranging from large fines to jail time.

Now that we have got the warnings out of the way, Trenbolone is one of the best anabolic steroids for rapidly building muscle mass and changing the physique. There is a reason as to why it is so popular, and that is simply because it works so well. However, being aware of the side effects is always important and if you have never used Trenbolone before, these should be taken into consideration before doing so. You should also remember that Trenbolone is not manufactured for human use. Therefore, any source claiming to have finajet or finaject is not being honest with you.

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Trenbolone Structural Information:

  • (17beta-Hydroxyestra-4,9,11-trien-3-one)
  • (Trenbolone + Acetate Ester + Enanthate Ester)
  • Anabolic/Androgenic ratio: 500/500
  • Formula: C20 H24 O3
  • Formula (base): C18 H22 O2
  • Formula (ester): C2 H4 O2
  • Effective Dose (Men):50-100mg every other day
  • Active life (Acetate): up to 3 days
  • Active life (Enanthate): up to 14 days
  • Active life (Parabolan): up to 4 days
  • Detection Time: 5-9 months in humans