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Old 11-23-2012, 07:32 PM   #57
inmate No. 1363917
East Side Guru
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Default Re: Blood vs. urine? USADA clears up fuss over Mayweather-Pacquiao drug testing feud

Tygart is actually correct in staing about HGH. - HGH exists in the blood at a hundred times greater concentration than in urine. The challenge and invasiveness of obtaining and handling samples is vastly greater for blood than for urine testing, which is the athletic commission standard. More problematic is the very short half-life of HGH in the body: about 2.5 hours. A day after injecting HGH, serum levels are 0.1 percent of the injection dose, and a week after using HGH, the drug is completely gone from the system.

On a side note :

“[On] HGH blood test, they’ve done thousands of tests and they’ve only caught one guy,” Kizer stated in May 2010, when the Nevada commission last considered HGH testing. “Either he is the only guy doing HGH or there are a lot of false negatives.”

By itself, HGH is useless. Studies in Australian Sports Academy showed that HGH alone actually benefited only athletes who are involved in short spurt events like a 100 meters, where a millisecond counts.

Blood dopers use the HGH in conjunction with steroids to synergically enhance the androgenic effect of steroids, while taking smaller doses of steroids. That is where the testing is being fought - the androgenic steroid, which is hard to hide and the testing specimen of choice is urine.
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