That’s how it often works: the initial test is run via the less-expensive, less-thorough methods.
Anti-Doping Agency’s (USADA’s) statement did not clarify the exact sequence of events, neither did it rule out this scenario.This appears to be what happened here.
That simpler, less-expensive approach appears to be what was used with Compton’s first test. Anti-doping agencies use it more now than in the past, but not all samples are screened via CIR. Here’s the rub: the type of GC-MS testing that can detect those different sources, called CIR (carbon isotope ratio), is relatively expensive. Is NextHash, Qhubeka’s New Sponsor, Legit?.Bio-passport testing, for example, screens levels of some natural AAS, but doesn’t doesn't determine the source. Naturally occurring AAS are particularly vexing for anti-doping tests, because not all GC-MS tests can tell natural vs. Per a Facebook post by Mark Legg, Compton’s husband, her positive was for synthetic testosterone (the official statement from the United States Anti-Doping Agency says only anabolic androgenic steroid). (The bio-passport has two modules: steroid and hematological, or blood, and checks levels of various substances in both, called markers, against both human norms and the athlete's own historical figures to look for changes that might suggest manipulation by doping.)įinally, the most sophisticated GC-MS testing also looks for metabolites of AAS: those such as testosterone, which can have natural or synthetic sources, and purely synthetic stuff like Stanozolol or Trenbolone. There are several types of GC-MS testing, including that used for bio-passsport data, which examines samples for levels of certain AAS that are naturally produced by the body. Samples are also screened via a method called gas chromatography-mass spectrometry (GC-MS). An out-of-range result triggers more analysis. The cheapest, most basic approach simply looks at ratios of testosterone to other steroid hormones, like epitestosterone.
KATIE COMPTON FULL
Per World Anti-Doping Agency (WADA) protocols, samples are screened via several methods not every sample gets the full battery of tests. In anti-doping, anabolic-androgenic steroids (AAS) are tested via urine samples. How’s that possible? It’s how the process works sometimes. From what she said, the initial anti-doping test was negative, but the sample was later re-tested and came up positive. In her statement, Compton said she tested positive in a re-test of an out-of-competition test sample from September 2020. Play icon The triangle icon that indicates to play Here’s what we (probably) know
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