Valuable properties of green and white tea for steroid users

Sportspersons become more and more sophisticated in administration of steroids. They find out new methods to hide their usage of forbidden medicines. Certain athletes take time to study researchers’ conclusions which may help them to hide that they dope. Today a method has been discovered: sportspersons may mask usage of testosterone by drinking of green tea.
Testosterone is a hormone that presents in body naturally. So, it can be difficult for anti-doping organizations to determine that a person has taken testosterone. T: E ratio testing is ordinarily used by anti-doping organizations. Such tests can show unusual ratio of testosterone to epitestosterone in urine. But it doesn’t have ability to manifest difference between testosterone which has been created in body naturally and that introduced into body with the help of injections, creams, etc.
 Declan Naughton and his colleagues at Kingston University ( London) have discovered that green tea has such compounds that are called “catechins”. They have ability to inhibit the enzyme UGT2B17. This enzyme induces attaching glucuronic acid to testosterone. If UGT2B17 is inhibited, less testosterone glucoronide is excreted in urine.  
Catechins, the substances that can mask administration of testosterone, are contained in green and white tea. Black tea lacks such compounds.
Naughton and his colleagues have conducted several experiments. They claim that a cup of strong green tea hides intake of testosterone.
Thus, those sportspersons that administer testosterone may decrease quantities of testosterone excreting in urine by consumption of green or white tea. Green or white tea can block excretion of testosterone, increasing circulating levels of this hormone.
The World Anti-Doping Agency was informed about the findings by the specialists. If this process occurs, it means that it is not worthy to subject sportspersons to urine tests. Blood tests should be performed in order to detect testosterone use.
Olivier Rabin, the WADA’s expert, confirms that regular checks of blood steroids will be added. Everything will be done by anti-doping agencies in order to prevent fooling of urine tests.