Green and white tea can mask testosterone use

Athletes become more and more sophisticated in steroid use. They study new methods to mask their intake of prohibited products. Several athletes spend time studying scientists’ statements that can help them to hide that they dope. Nowadays a way has been found: sportspersons may mask application of testosterone with the help of green tea.
Testosterone is a hormone that occurs in body naturally. Thus, it may be difficult for anti-doping agencies to define that a sportsperson has taken testosterone. T: E ratio testing is ordinarily utilized by anti-doping agencies. Such tests may demonstrate uncommon ratio of testosterone to epitestosterone in urine. But it doesn’t have ability to display difference between testosterone which has been created in body naturally and that introduced into body with the help of injections, gels, etc.
 Declan Naughton and his colleagues at Kingston University ( London) have discovered that green tea contains such compounds which are called “catechins”. They are able to inhibit the enzyme UGT2B17. This enzyme promotes attaching glucuronic acid to testosterone. If UGT2B17 is inhibited, less testosterone glucoronide is excreted in urine.  
Catechins, the compounds that have ability to mask administration of testosterone, are contained in green and white tea. Black tea doesn’t contain such compounds.
Naughton and his colleagues have conducted certain experiments. They confirm that a cup of strong green tea mask intake of testosterone.
Thus, those athletes who take testosterone may reduce amounts of testosterone excreting in urine by consumption of green or white tea. Green or white tea has ability to block excretion of testosterone, enhancing circulating levels of this hormone.
The World Anti-Doping Agency was informed about the findings by the scientists. If this process occurs, it is worthless to test urine. Blood tests must be performed in order to detect usage of testosterone.
Olivier Rabin, the WADA’s specialist, 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.