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 AAS 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. 
So is there still a drug problem in WWE? Potentially. The issue is that WWE has a Wellness Policy they tout as one of the best in the business. Yet they still do have several guys who are big. They very well could have gotten bigger on hard work like John Cena, who has not changed much body wise in his 12 years with the company. If he used in that time, we would have noticed a change. However, you have some like a Chris Benoit and Eddie Guerrero who we know used because they started out small and just got bigger and bigger. It comes down to WWE still having a potential drug problem even in 2014, and it is obviously something they need to take care of.
Since 2013, WWE has agreed to donate $ million to the foundation, making it the largest benefactor the nonprofit has publicly acknowledged. During that period, Nowinski and his foundation staff have reached out to the families of 12 deceased athletes to acquire their brains for researchers to study for links between repetitive head blows and chronic traumatic encephalopathy, or CTE, a degenerative brain disease that has been diagnosed in hundreds of sports and military veterans, many of whom have committed suicide or succumbed to drug overdoses.