FWIW, in addition to its rich tradition, the Tour de France also has an infamous history of all types of folks trying to sabatoge various riders and teams with tainted food and drink as well as planting damning evidence for officials or media to find.
I am fairly certain that testosterone can not be ingested with food or drink. The stomach acid destroys it. It is most often injected under the skin or through a skin patch. Could a massage therapist "rub it in"? Maybe, but highly unlikely.

Much more damning than the use of illegal drugs are the lies that Landis has been telling. If this story pans out as true, the damage to Landis' credability will be far greater than the damage to his career.