python said:segura: Samples were collected in polypropylene bottles (free of DEHP)
Paco_P said:First, in the document instances of clenbuterol poisoning in Spain, those poisoned had eaten specifically veal liver (see the abstract for http://www.ncbi.nlm.nih.gov/pubmed/7610227) - there is no evidence I can find that enough clenbuterol could accumulate in a tenderloin to poison the eater of the tenderloin, without having first killed the cow -
flicker said:Let me make it a little simpler for you. "Alberto your 15 minutes of fame has expired. You are the weakest link, G' bye"
Merckx index said:This is not true. I posted a link more than a week ago (I think in the plasticizer thread) to a study that showed that eating steak, not veal, from calves given reasonable, non-toxic doses of CB could result in urine levels more than 10x higher than what Bert tested for. Not enough to "poison" someone, to be sure, but that's not the issue, since Bert never claimed to be poisoned.
Then someone posted another link yesterday on another thread--I can't remember which one--of a study that even said there were cases of CB poisoning--IOW, very high levels--from eating meat.
Here are the links:
http://proceedings.live-record.de/proceedings_2_pdf/2_185.pdf
http://www.ncbi.nlm.nih.gov/pubmed/9610490
The rest of what you say is a better argument. Testing of Spanish meat has found very few samples with CB, so it appears highly unlikely Bert ingested contaminated meat. Not impossible, as Ramos said, but unlikely.
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Paco_P said:You are right, and after googling a bit, I found a fair number of other studies that confirm that it is possible to get Contadoresque levels of clenbuterol by eating meat (rather than liver). Perhaps I've fallen into the trap of being unfair because it seems so hard to believe that he would be innocent.
JPM London said:Don't let anybody tell you to listen to anything. If you feel like being biased you're perfectly welcome - it's actually a pretty popular pastime for countless people... Even quite a well paying job for many.
JMBeaushrimp said:The clen positive is one thing. How about the plastic? Unless he gets his meat ground up and fed through a toothpaste tube, there are still some serious doubts about his 'diet'.
ElChingon said:He could prove his innocence by testing his other blood bags for traces of Clen. and prove to us there is no Clen. in them!
Opps, that would also prove he blood dopes![]()
Merckx index said:Actually, you make what might be a very relevant point. If Bert has been blood doping by separating red cells, freezing them, then re-infusing them later, he could not test positive for CB, or probably DEHP, either, as a result of this procedure. To reiterate, most of the CB in his blood would be removed when the red cells are separated from the plasma, and the red cells would be stored in bags not containing DEHP.
So suppose he has been blood doping in this manner. He therefore knows with a high degree of certainty that the CB must have gotten into his system from contaminated meat, rare as that is, because he never transfused with whole blood in DHEP bags. But he obviously can't explain this to the UCI/WADA.
Merckx index said:Actually, you make what might be a very relevant point. If Bert has been blood doping by separating red cells, freezing them, then re-infusing them later, he could not test positive for CB, or probably DEHP, either, as a result of this procedure. To reiterate, most of the CB in his blood would be removed when the red cells are separated from the plasma, and the red cells would be stored in bags not containing DEHP.
So suppose he has been blood doping in this manner. He therefore knows with a high degree of certainty that the CB must have gotten into his system from contaminated meat, rare as that is, because he never transfused with whole blood in DHEP bags. But he obviously can't explain this to the UCI/WADA.
JMBeaushrimp said:DEHP would remain in the plasma? And not cross-contaminate the reticulocytes? Just asking 'cause I'm the curious sort...
JPM London said:By the way, Merckx, you mentioned that the blood would need to be cryo-frozen - would that in itself further affect any remaining traces of CB? For instance "kill" or render "intestable" whatever might have been attached the RBC?
sagard said:The guy is still a fantastic rider and one of smartest riders. Unfortunately he simply got caught with something in his system. He is no more dirty or clean than the rest of the elite GT riders.
sagard said:To determine whether he is innocent, simply follow the simplest and most probable explanations. It seems similar to other riders scenarios who all have attempted weak explanations.
The guy is still a fantastic rider and one of smartest riders. Unfortunately he simply got caught with something in his system. He is no more dirty or clean than the rest of the elite GT riders.
Pay the whatever penalty is deemed appropriate after trying to get it reduced, then come back and start beating these guys again.
Just don't pull a Valverde or a Landis and drag it out.
Clenbuterol, though, is always prohibited,” Van Eenoo said.
“If I took a lot and you tested me an hour later, I might still have a lot in my system, but if you tested me in four or five days, it might be there in small quantities and you wouldn’t know what effect it had had.”
patrick767 said:So either the clen came from a blood transfusion and Contador is guilty, or he is innocent and is likely to pay the price anyway. Does that sum up the situation correctly?
_yngve_ said:I'd phrase it more as: either the clen came from a blood transfusion and Contador is guilty; or he failed to take adequate precautions and/or responsibility for what he puts into his body and unintentionally ran afoul of a strict liability standard and so is likely to pay the price anyway.
All this meat/bag talk presents an explanation for a failed test. It does not (and, unless Pat decides to go way off the rails, cannot) excuse it. In other words, either way, Bert is "guilty" of consuming clen.
patrick767 said:You have a point. I'm just saying that the transfusion explanation makes him a doper and I have no sympathy whatsoever. The accidental contamination, under the rules, is very likely to result in him paying the price anyway. If it's the real explanation, it's a huge shame for Contador, who would only be guilty of making a dumb mistake, and for cycling, which would see a rider stripped of his TdF win for something stupid rather than deliberate doping.
Anyway, the tiny amounts of clen they found don't seem to fit any other explanation than these two.
Merckx index said:Could Contador be the victim of such natural variation? It should be easy enough to see if this is the case. If he really is innocent, as he claims, he ought to submit to spot testing of urine samples for DEHP metabolites over a period of several days. If the values recorded for his TDF samples were the result of normal variation, that variation should be evident in such a re-test. At least a few of his samples ought to show values in the range of those reported for his TDF samples, while others would be much lower. In other words, the spike reported in his TDF samples would be a natural phenomenon, as shown in other individuals. If this is indeed the case, he will have a very strong argument that the DEHP results do not establish blood doping, which in turn, will strengthen his claim that his CB positive resulted from contaminated meat.
On the other hand, if his samples show no evidence of variation that could account for high DEHP values--if they remain consistently low over a period of several days--then a conclusion of blood doping becomes much stronger. The only alternative explanation would be that he was exposed to some other source of DEHP. But this is unlikely, not only because other sources that can account for such high levels are rare, but because the exposure was temporary. It’s difficult to imagine what he could have done during a TDF--when he spent most of his time either racing or in a hotel room--that would have brought him into contact with high levels of DEHP, and only on one particular day.
Regardless of the outcome of the Contador case, I think there are some serious problems with the proposed DEHP test for blood doping. Others have pointed out that athletes could avoid excessive exposure by storing blood in containers that have much lower levels of DEHP than commonly-used blood bags. But even if all transfusions took place with DEHP-containing blood bags, interpreting results may be very difficult, given the variability of metabolite levels. Possibly, a clear-cut difference between transfuses and non-transfuses can be defined by taking 24 hour samples, averaging out variations over time, as in Segura’s study. But it’s very difficult to obtain such samples from athletes; normally, a spot sample is taken. And of course, all samples currently stored from earlier events are of this kind.
JPM London said:Don't let anybody tell you to listen to anything. If you feel like being biased you're perfectly welcome - it's actually a pretty popular pastime for countless people... Even quite a well paying job for many.
Thoughtforfood said:My question for this is, would not a fluctuation in DEHP over time be context specific, and would not the test you propose have to be carried out so that Contador had to go through the exact same routine and contacts he did during the race? DEHP is not a naturally produced by the body, therefore the level in our urine must come form an outside source. You would have to exactly replicate his entire week from the TdF to replicate the test you propose. That is impossible.