The results
Saul “Canelo” Alvarez gave two samples to the Voluntary Anti-Doping Agency (VADA), one on February 17th and one on February 20th. Both samples tested positive for clenbuterol. ESPN posted the letter sent by VADA, which stated Canelo’s Feb 17th sample came back with 0.6-0.8 ng/ml of clenbuterol, and the Feb 20th sample came back with 0.06-0.08 ng/ml of clenbuterol
The potential explanations for those results
There are two potential explanations for Canelo’s test results. The first is the explanation his camp has put forward; the positive test is the result of tainted meat, which is a serious and well documented issue in Mexico.