Trenbolone Hexahydrobenzylcarbonate (TREN HEX) was first released by the French-based Negma Laboratories in the late 1960’s under the trade name Parabolan. This represents the first and only Trenbolone hormone to ever exist in human grade form. Parabolan was prescribed for many years in cases of malnutrition. It was also prescribed to treat osteoporosis in some cases, as well as in the treatment of cachexia. However, in 1997 Negma would pull Parabolan from the market. As the first human grade pharmaceutical Trenbolone compound, it was also the last.

Parabolan is very similar to the more popular Trenbolone Acetate (Fina) compound. The only difference is the ester attached, as Parabolan will provide a much slower release of Trenbolone requiring fewer injections. The functional traits and characteristics of the Trenbolone hormone do not change based on the attached ester.

Parabolan Functions & Traits:

Parabolan, officially labeled Trenbolone Hexahydrobenzylcarbonate (Tren Hex) is a structurally altered form of Nandrolone. Nandrolone being the hormone most commonly associated with Deca Durabolin (Nandrolone Decanoate). For the Trenbolone hormone to exist, the Nandrolone hormone has an added double bond at carbon positions 9 and 11. This greatly increases the hormones androgen binding affinity and inhibits the hormone from aromatizing. Parabolan carries no aromatizing nature. This slight modification also slows down the metabolism of the hormone resulting in a far more potent anabolic and androgenic nature than Nandrolone, far beyond testosterone as well. In order to understand this hormone’s power, consider its anabolic and androgenic ratings. Trenbolone carries an anabolic rating of 500 as well as an androgenic rating of 500. All steroids carry a rating measured against the rating of testosterone, which carries a rating of 100 in both categories. More importantly, the Trenbolone hormone’s ratings match up perfectly to its translating activity. This is not always the case as can be seen in steroids like Halotestin (Fluoxymesterone) and Proviron (Mesterolone) to name a few. You will be hard-pressed to find an anabolic steroid that carries the raw anabolic and androgenic power of Parabolan.