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.
Finally, it must be mentioned that any particular ester of Trenbolone does not require a similarly estered anabolic steroid to be stacked with it (for example, Trenbolone Enanthate stacked with Testosterone Enanthate). It is a perfectly fine and safe practice to be able to combine, for example, Trenbolone Acetate and Testosterone Enanthate (instead of Testosterone Propionate ) in Trenbolone cycles. These combinations present no problems and actually work well, but every individual curious about these combinations must always be aware that proper timing, half-life, and injection frequency varies with each of these compounds. The only reason why many individuals prefer to stack Testosterone Enanthate with Trenbolone Enanthate , for example, is because of the convenience aspect and ease of administration frequency and timing (as both compounds are identical in half-life).
Regardless of the type of cycle or intended purpose most will find 6 weeks of Trenbolone-Acetate use to be the minimal time frame with 8 weeks being far more optimal. You can use it for longer periods but 12 weeks will generally be all the Trenbolone anyone will ever want and should be reserved for more experienced users who understand how their body reacts. The strong majority of Trenbolone-Acetate users will generally find 50mg every other day to be just about perfect, with 100mg every other day being a good dosing for a more advanced athlete and user, especially one looking for more of a bodybuilding type physique. For higher end doses some will choose to go as high as 100mg every single day but most will never need this amount and if they do such an amount is best served towards the end of a bodybuilding contest prep cycle and diet in order to bring in ultimate hardness.
You will find T renbolone-Acetate stacks well with just about any other anabolic steroid imaginable but if there is anything you should stack it with it is some form of exogenous testosterone; the form of testosterone doesn’t matter, long esters, short esters and mixtures are all absolutely fine. Many individuals may also find Cytomel to be a useful addition to a Trenbolone stack as the hormone will slightly lower natural T-3 levels. No, this addition is by no means an absolute must but it can provide some useful benefits especially while dieting.
Once your cycle ends and you are entering into you Post Cycle Therapy (PCT) if the cycle ends with Trenbolone-Acetate and all other steroids are of a small ester form you will be able to begin your PCT in a few short days. This gives Trenbolone-Acetate an advantage over Trenbolone-Enanthate, for if the Enanthate version were being used you would need to wait approximately 2 weeks before PCT began. Remember, the sooner we can start our PCT the better off we’ll be, in-terms of gains kept and our overall health.