FanHouse: Can you break down the differences between the effectiveness of drug-detection between urinalysis and blood-testing?
Travis Tygart: There's a host of significant and potent performance enhancing drugs that only blood will detect. Those include human growth hormone [HGH]; HBOC -- and that is synthetic hemoglobin; transfusions; certain forms of EPO, such as Mircera, which is essentially a designer EPO.
So those are a few of the specific drugs. There is also a different technique, which is known as parameter testing, which is done by the blood, or biological passport testing. Essentially, what it does is that it does not detect a specific drug like HGH.
But it looks at a host of parameters or biological markers that are natural to everyone's body. And over time -- if you look at those for an individual -- over time, you can see variability or fluctuations in those naturally occurring markers that we all have.
And if you see fluctuations to a certain degree, you can conclusively determine that those fluctuations were caused by nothing other than drug use, and certain categories of drug use. Not necessarily a specific drug, but categories of drug use.
I think that it's fair to say that there are several, very potent, performance enhancing drugs that only blood can detect, and there is an entirely different method of detecting broader categories of drug use through parameter testing that is done with the blood.