![]() 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. 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. This is context, and perspective, that I have not seen widely discussed. Along the way, I learned some about how anti-doping testing works, and how it doesn’t, and how these things play out for the human beings involved. I spent 15+ years writing and reporting a fair bit about doping in pro cycling.
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