To boost mood and manliness, men are spending lots of money on the hormone testosterone—yet they may see trouble instead of ...

Tests show that some of the testosterone in Floyd Landis' system at the Tour de France was synthetic and not naturally produced by his body as he claimed, according to a newspaper report.

While one works to introduce synthetic testosterone into the body (regular testosterone supplement), the other works with the body to make more testosterone (booster supplement). Typical testosterone ...

Studies raise concerns about synthetic testosterone drug A medicine developed in Georgia to treat men’s middle-age fatigue is now the focus of a federal investigation and a string of lawsuits.

But synthetic testosterone tends to contain a smaller amount of the heavier isotope. This test is considered to be far better than T/E ratios at distinguishing synthetic from natural testosterone.

Landis' "B" sample, or backup sample, was tested several days later. Both samples are said to have shown the presence of synthetic testosterone. Landis was tested a total of eight times during the ...

Tests show that some of the testosterone in Floyd Landis' system at the Tour de France was synthetic and not naturally produced by his body as he claimed, according to a newspaper report.