May 8, 2012 |
World Boxing Assn. and International Boxing Federation junior welterweight champion Lamont Peterson has tested positive for synthetic testosterone, jeopardizing his May 19 title defense against England's Amir Khan at Mandalay Bay in Las Vegas, said Keith Kizer, executive director of the Nevada State Athletic Commission, and Peterson's promoter, Richard Schaefer. Kizer and Schaefer confirmed the positive result for synthetic testosterone and are now awaiting a letter Tuesday explaining the result from Peterson's attorney, both men said.
September 12, 2011 |
Hormonally speaking, becoming a father may make you less of a man, according to new research that finds testosterone levels drop in men after they become parents. But fear not for manhood — the results show that men are evolutionarily wired to help raise their children and that testosterone may get in the way, scientists say. Testosterone is a hormone associated with perceived hallmarks of masculinity such as libido, aggression and musculature. Those can be useful qualities when competing for a mate, but less so when raising a child — an endeavor that requires calm, attentiveness and an even temper.
September 10, 2010
What makes a corporate merger go bad? Is it a dramatic change in stock price? A revelation about an unprofitable business unit? Resistance from federal regulators? Researchers from the University of British Columbia propose another explanation – too much testosterone . Maurice Levi, Kai Li and Feng Zhang of the university’s Sauder School of Business came up with their theory based on prior research showing that the male sex hormone affects the way men play the ultimatum game . In one version of this game, Player A was asked to divide up $40 between himself and Player B – he could choose either a $35-$5 split, or a $15-$25 split.
August 25, 2010
A chemical found in plastics has been shown to increase testosterone levels in men, British researchers reported on Wednesday. They found that men who had high levels of the chemical bisphenol A also had higher testosterone levels compared to men with lower levels of the chemical in their bodies. The chemical, also known as BPA, is commonly found in plastic products around the world. The new study comes on the heels of research released earlier this month that found high amounts of BPA are present in everyday cash register receipts , as much as 3% of the total weight of the receipt.
August 15, 2012 |
San Francisco Giants outfielder Melky Cabrera has been suspended 50 games without pay after testing positive for testosterone, Major League Baseball said Wednesday. According to the commissioner's office, Cabrera violated the league's joint drug prevention and treatment program by testing positive for the banned substance and his suspension will begin immediately. “My positive test was the result of my use of a substance I should not have used,” Cabrera said in a statement released by the players' union.
April 19, 2008 |
Testosterone, the hormone that drives male aggression and sexual interest, also seems able to boost short-term success at finance. But elevated testosterone levels over several days could lead to irrational risk-taking, researchers at the University of Cambridge in England reported Tuesday in the Proceedings of the National Academy of Sciences. The team studied male financial traders in London, taking saliva samples in the morning and evening. Those with higher levels of testosterone in the morning were more likely to make an unusually big profit that day.