Transdermal patches (adhesive patches placed on the skin) may also be used to deliver a steady dose through the skin and into the bloodstream. Testosterone-containing creams and gels that are applied daily to the skin are also available, but absorption is inefficient (roughly 10%, varying between individuals) and these treatments tend to be more expensive. Individuals who are especially physically active and/or bathe often may not be good candidates, since the medication can be washed off and may take up to six hours to be fully absorbed. There is also the risk that an intimate partner or child may come in contact with the application site and inadvertently dose himself or herself; children and women are highly sensitive to testosterone and can suffer unintended masculinization and health effects, even from small doses. Injection is the most common method used by individuals administering AAS for non-medical purposes. 
You will not find Turinabol for sale in any pharmacy in the United States since it is no longer manufactured by pharmaceutical companies. People often travel across the southern border into Mexico to find Turinabol, and some of these individuals actually remain in Mexico for the duration of their cycles since bringing controlled substances across the border is a felony. The only Turinabol available in the world today comes from underground laboratories that create their own tablets or injectable serums, but these are not regulated. There is no way to be certain of the dose, which could prove dangerous.
There is a big controversy on this matter. There are some sources, which tells that turinabol depot is detectable up to 18 months and oral turinabol is detectable up to 12 months in worst-case scenario. Some other people on the forums tell that 6-8 weeks in more than enough. However, we cannot understand where they all took such huge and unreliable numbers from. Doping tests rarely shows chlordehydromethyl-testosterone indeed and it was widely used in 60es and 70es so there is a good evidence that real detection times are much shorter. Most likely this mistake happened because athletes used some long-living substances like deca long with it. Or, maybe, these sources misrepresent turinabol with the same deca, we have seen some product descriptions, supposedly made for turanabol but after reading we understood they were just copypasted from deca descriptions, stupid, isnt’ it? Also, just as brain-storming: YES, it quickly leaves the body and not detectable in the urine tests, but probably modern blood tests can detect it for longer time, especially when using injectable turinabol.