Experiments were able to show that chromium(III) was capable of up-regulating insulin-stimulated insulin signal transduction via affecting downstream molecules of the IR, as evidenced by enhanced levels of tyrosine phosphorylation of IRS-1 , elevated Thr308 and Ser473 phosphorylation of Akt , and increased PI3-K activity in a variety of cellular and animal models.  The increased IRS-1 phosphorylation led to increased insulin receptor sensitivity while Akt and PI3-K led to enhanced GLUT4 translocation to the cell surface, thus causing greater uptake of glucose. 
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.