The Globe and Mail reports in its Tuesday edition that legal cannabis may not be as strong as the vendors say it is. The Globe's Irene Galea and Jameson Berkow write that cannabis producers and testing laboratories say that many labels on legal dried cannabis misrepresent the amount of THC and CBD actually contained in the dried flower, and often overstate both. Studies by two labs show that some samples had 20 per cent less THC than the amount specified. Some critics attribute the disparities to a lack of standardized testing methods and government oversight, saying producers are cherry-picking and processing samples in ways that are not representative of entire batches of pot and the THC contained in the end product. Others allege that some cannabis testing firms use fraudulent techniques to produce inflated THC results. Health Canada is reviewing complaints about inaccurate labels. Miguel Martin, chief executive officer of Edmonton-based Aurora Cannabis, agreed that the lack of national sampling protocols has resulted in "variability" in interpretation of the accepted testing methodology. "I hope the industry rallies around a standard," Mr. Martin said. "I think that would be the best thing for all of us."