This anabolic steroid can be used as an effective cortisol antagonist. Therefore, it decreases the level of corticosteroid in the body and this is one of the reasons why Trenbolone produces large gains in muscle mass with a relatively smaller dose of the steroid compared to other anabolic steroid. So the type of trenbolone acetate results that you can expect to see largely revolve around muscle gain as well as fat loss. This feature is also one of the things that contributes to the ability of the steroid to reduce the amount of water retention building up within the body.
Trenbolone acetate is a modified form of nandrolone.  The structure of trenbolone acetate is a 19-nor classification, which represents a structural change of the testosterone hormone. Trenbolone acetate lacks a carbon atom at the 19 position and carries a double bond at carbons 9 and 11. The position of these carbons slows its metabolism, which greatly increases its binding affinity to the AR, and inhibits it from undergoing aromatization into the corresponding estrogenic metabolite. Trenbolone acetate contains trenbolone modified with the addition of a carboxylic acid ester ( acetic acid ) at the 17β-hydroxyl group.  This facilitates the slow release of the AAS from the area of injection.