Metribolone (methyltrienolone aka R1881) is a potent, non-aromatizable androgen that is structurally similar to trenbolone and has been referred to as “oral tren.” Methyltrienolone binds strongly to the androgen receptor (AR) and is a more potent agonist (activator) of the androgen receptor than is DHT. 17a-methyltrienolone is listed at 30,000 times more anabolic than methyltestosterone according to Julius Vida in “Androgens and Anabolic Agents: Chemistry and Pharmacology.” Effective dosages begin at only 25mcg (Microgram!!).

Steroid experts have called methyltrienolone one of the “most powerful” anabolic steroids ever created. It is also one of the most hepatotoxic androgens ever produced and that is exactly we made it injectable.

Simply put, Trenbolone is one of the most powerful overall steroid in use by bodybuilders today. Tren, as it is often called, is both highly androgenic and anabolic. It is chemically unable to aromatize, and therefore produces no estrogen buildup. This, along with its high androgenic properties, makes the muscle produced by this drug very hard and defined.

Trenbolone first got its reputation when it was used in the legendary human grade steroid, Parabolan. Users of this drug often noted dramatic results that were nothing short of amazing, and after it was unfortunately discontinued, the remembered effects of the substance gave it cult like status and the market was flooded with bunk Parabolan amps by those looking to profit off the extreme popularity and fan base that this steriod’s incredible results had sparked.

Trenbolone Acetate was also used in cattle implant pellets, where the substance was used to increase the lean mass of the cattle, while reducing the fat on the animals. Kits became widely available on the internet allowing bodybuilders to convert these pellets into injectable solution. Fina, as this homebrew oil was often called, quickly became a favorite of steroid users, like its relative, Parabolan, had done many years before.

Trenbolone is an injectable anabolic/androgenic steroid which is derived from the the steroid nandrolone. It’s activity however is quite different to the point that direct comparisons between the two are difficult to make. Trenbolone is considerably both more anabolic and androgenic than its parent nandrolone on a milligram for milligram basis.

Trenbolone is considered to be one of the strongest steroids available today. It is roughly three times more anabolic than testosterone and a very potent androgen as well. Users of Trenbolone often report incredible gains in strength and solid muscle mass. Trenbolone doesn’t convert to estrogen, therefore the gains seen off of this steroid are lean, quality muscle mass. The high amounts of androgen also work to bring about a defined “ripped” look to the user’s muscles.

Although it doesn’t convert to estrogen, trenbolone being a nandrolone derivative does act on the progesterone receptor and can cause related side effects because of this trait. Progesterone side effects are similar to those of estrogenic side effects and can include things such as bloat and gyncomestia. Because of this, users of trenbolone might want to consider running an agent such as bromocripten or cabasear in order to combat possible progesterone related side effects.

Trenbolone is a versatile steroid and can be incorporated well into both bulking and cutting cycles. Users looking to bulk may choose to stack Trenbolone acetate with other steroids such as testosterone and an oral such as dianabol. Users looking to run a cutting cycle will often look to stack trenbolone with other steroids such as winstrol and masteron. It is important to note that trenbolone will shut down the body’s natural testosterone production very quickly, thus making a post cycle therapy protocol essential upon the discontinuance of the drug.

Users often choose to run testosterone for a couple of weeks after the trenbolone in order to clear the receptors of the compound and make recovery a little easier to accomplish. The high androgenic activity of trenbolone means that androgen related side effects are very common with this drug. These side effects can include things such as oily skin, acne, increased growth of facial and body hair.

Even if some profiles claim that an esterification of a blend of esters from a compound “are not superior or inferior to any Trenbolone form” new insight in pharmacokinetics prove them wrong.

This is called synergism 1 + 1= 3.