Tri-Trenabol is a part of the chemical group known as 19-nortestoserone (19-nor) and it is an anabolic androgenic steroid . The 19-nor classification refers to the testosterone hormone lacking the carbon atom at the 19th position, a classification that you may already be aware of from the drug Nandrolone. The Trenbolone hormone is actually a derivative of Nandrolone. Specifically, it is the Nandrolone hormone with an added double bond at carbons 9 and 11, which decreases the rate of the hormone’s metabolism, increases its androgen binding affinity and prevents the hormone from aromatizing . This essentially means that the levels of estrogen produced in the body whilst taking this drug are kept down to a minimum when it comes to taking anabolic steroids, a lot of users experience some side effects that are related to the high levels of estrogen, this is going to be unlikely when using Trenabol. While this represents only a slight change in structure from the Nandrolone hormone, it is enough to make the Trenbolone hormone very unique.