The partition coefficient of the ester in question is important because is effects how long the drug itself stays in the system. If the testosterone transfers too quickly from the oil to the blood, the result is a sudden spike in testosterone which then rapidly drops once the dose has been used up. In the example of free testosterone injected into the muscle from a water suspension (as in Aquiviron, mentioned above), the testosterone is essentially immediately available to the bloodstream due to its low partition coefficient, and thus there is an immediate spike of testosterone which is used up quickly in the body.
In February 2017, American triathlete Beth Gerdes was given a 2-year suspension for presence of ostarine, and American triathlete Lauren Barnett was given a 6-month suspension for the presence of Ostarine. Both triathletes claimed contamination from salt tablet supplements. Lauren Barnett was able to provide tablets and sealed bottle tablets which both tested positive for contamination, thus only the 6-month suspension. The 2-year suspension still stands for Beth Gerdes who provided tablets for testing, but tests showed only low levels of ostarine not high enough to confirm the finding. 
Tren can be found in many different forms of hormonal compound, two of the most popular are; Trenbolone Acetate and Trenbolone Enanthate . Though it depends on person to person but steady gains in strength and power is shown in week one to six. Week seven to ten shows some changes in body composition while going to week eleven to twelve there is huge gain in muscles up to 9 lbs, strength, stamina, ad power, and a decrease in fat. Oral steroids such as Dianabol can be taken with Tren if you are looking towards bulking, for a cutting cycle users can take masterone and winstrol with Tren for effective loss in weight.