Scientists say that green tea can help mask the levels of testosterone in the body, the Daily Mail reported.
A study found extracts contained in the beverage reduced concentrations of the hormone by up to 30 percent.
Olympic doping officials have now raised concerns that athletes could use tea to hide increased levels of testosterone from standard drugs tests. Testosterone is commonly used to build muscle.
Olivier Rabin, scientific director of the World Anti-Doping Agency, said that changes could be necessary.
(China.org.cn, CNTV April 11, 2012)