Trenbolone Hexahydrobenzylcarbonate represents the dominant large ester based Trenbolone compound on the market. It was first released by the France 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, which will make a lot of sense as we dive into the compound. It was also prescribed to treat osteoporosis in some cases, as well as in the treatment of cachexia.
A number of nandrolone cases in athletics occurred in 1999, which included high-profile athletes such as Merlene Ottey , Dieter Baumann and Linford Christie .  However, the following year the detection method for nandrolone at the time was proved to be faulty. Mark Richardson , a British Olympic relay runner who tested positive for the substance, gave a significant amount of urine samples in a controlled environment and delivered a positive test for the drug, demonstrating that false positives could occur, which led to an overhaul of his competitive ban. 
How do you protect yourself against this? Well, when taking Deca Durabolin you can also take ant-estrogen medications to counter the results. Things like Nolvadex and Arimidex are popular choices. Both approach limiting the effects of estrogen different and will have different side effects on your health worth considering. Even with side effects though it is still worth pursuing either of these options. Gynecomastia is a particularly big problem due to how the imbalance between estrogen and progesterone is what leads to gynecomastia. So, by keeping your hormone levels regulated, you reduce the risk of potential unwanted growth.