According to “Clenbuterol Residues in Bovine Feed and Meat” [1] Clenbuterol levels in contaminated beef (in Mexico) have values in the range 0.1 to 2.3 micrograms (max. recorded) of clenbuterol per kilogram of meat. So a 100g piece of steak could contain between 0.01 and 0.23 micrograms (i.e. 10-230 nanograms) of Clenbuterol. One of Canelo's samples (i.e. specimen 4121793) contained 600-800nanograms.
The half-life of clenbuterol in plasma, when administered to humans as a drug, was estimated to be about 35 h [2]. The cumulative urinary excretion of unchanged compound corresponded to about 20% of the administered dose as measured at 72h following a single oral administration [2]. What this means that if you use Clenbuterol in a drug form, within 72hrs you can detect only 20% of the original dose in your urine.
This is a clear indication that Canelo was using Clenbuterol illegally and got caught during the time when the drug did not fully disintegrated. I like both fighters but everything here indicates Canelo and his team used illegal means to enhance his performance.*
Reference:*
[1] Silvia Denisse Pena Betancurt , Antonio Uribe , Alejandro Cordova-Izquierdo and Aldo M. Michel, "Clenbuterol Residues in Bovine Feed and Meat", Research Journal of Biological Sciences, Vol. 3, Iss. 12, pp. 1444-1445, 2008.
[2] Yamamoto I, Iwata K, Nakashima M, "Pharmacokinetics of plasma and urine clenbuterol in man, rat, and rabbit", J Pharmacobiodyn., May, Vol. 8, No. 5, pp. 385-91, 1985.
The half-life of clenbuterol in plasma, when administered to humans as a drug, was estimated to be about 35 h [2]. The cumulative urinary excretion of unchanged compound corresponded to about 20% of the administered dose as measured at 72h following a single oral administration [2]. What this means that if you use Clenbuterol in a drug form, within 72hrs you can detect only 20% of the original dose in your urine.
This is a clear indication that Canelo was using Clenbuterol illegally and got caught during the time when the drug did not fully disintegrated. I like both fighters but everything here indicates Canelo and his team used illegal means to enhance his performance.*
Reference:*
[1] Silvia Denisse Pena Betancurt , Antonio Uribe , Alejandro Cordova-Izquierdo and Aldo M. Michel, "Clenbuterol Residues in Bovine Feed and Meat", Research Journal of Biological Sciences, Vol. 3, Iss. 12, pp. 1444-1445, 2008.
[2] Yamamoto I, Iwata K, Nakashima M, "Pharmacokinetics of plasma and urine clenbuterol in man, rat, and rabbit", J Pharmacobiodyn., May, Vol. 8, No. 5, pp. 385-91, 1985.
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