This should give you a good understanding of tren and how perfect of a compound it is when you’re choosing which AAS to run. In most cases tren should not be run by itself; tren will shut down your natural testosterone production and you’re best suited to stack tren with some form of testosterone. Also, an important note, Trenbolone is typically not suitable for beginners; Trenbolone as we can see is a very, very potent compound and the side effects in some cases can be brutal for some lifters. That is also another reason why Trenbolone Acetate is best in comparison to other forms of Trenbolone. Because it has the Acetate ester attached to it, making it very fast acting and giving it a very short half-life, if problems arise, the lifter can discontinue Trenbolone Acetate and have it cleared from his system very quickly.
Heavy consumption of the essential amino acid lysine (as indicated in the treatment of cold sores) has allegedly shown false positives in some and was cited by American shotputter C. J. Hunter as the reason for his positive test, though in 2004 he admitted to a federal grand jury that he had injected nandrolone.  A possible cause of incorrect urine test results is the presence of metabolites from other AAS, though modern urinalysis can usually determine the exact steroid used by analyzing the ratio of the two remaining nandrolone metabolites. As a result of the numerous overturned verdicts, the testing procedure was reviewed by UK Sport . On October 5, 2007, three-time Olympic gold medalist for track and field Marion Jones admitted to use of the drug, and was sentenced to six months in jail for lying to a federal grand jury in 2000. 
Some bodybuilders and athletes use trenbolone for its muscle-building and otherwise performance-enhancing effects. [ citation needed ] Such use is illegal in the United States and many other countries. The DEA classifies trenbolone as a Schedule III controlled substance under the Controlled Substances Act .  Trenbolone is classified as a Schedule 4 drug in Canada  and a class C drug with no penalty for personal use or possession in the United Kingdom .  Use or possession of steroids without a prescription is a crime in Australia .  The infamous "duchess" cocktail administered to Russian athletes at the Sochi Winter Olympics consisted of oxandrolone , metenolone , and trenbolone.