>>>The basis of the urine test is the T/E ratio, a balance between testosterone and epitestosterone in the body. Most adults have a range between 1:1 to 2:1, but the UCI has set the threshold at 4:1 to allow for riders with naturally occurring his testosterone levels.
The T/E ratio can vary widely within individuals, and in some cases the T/E ratio may be above the 4:1 ratio without doping while others can stay below the threshold despite cheating. The ratio tends to be constant over time, but wild swings may indicate doping. Other factors can cause swings in the ratio, such as dehydration, fatigue and even alcohol.
Anything above that threshold sends a red flag for doping controls. Landis would not reveal what his T/E ratio was in the samples taken after stage 17 into Morzine, when he went on an all-day solo attack to crawl his way back into overall contention.
The T/E ratio is not a sure-fire way to measure testosterone in the body, but it's the only detection method currently used under anti-doping controls.
Other riders have been caught up in the T/E ratio web and some have been cleared after proving with endocrine testing they have naturally high occurring testosterone levels. <<<<
So maybe it WAS the beer. After his nightmare stage he told everyone he was going to get drunk that night.