This is the best summary I could come up with:

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.

Health Canada says it is reviewing complaints about inaccurate labels, and in July it launched a data collection program that involves comparing product results to potency claims.

Gord Nichol, president of family-run Saskatchewan producer North 40 Cannabis, said he independently tested 33 competing products, and found the results to be “abysmal,” with only around a fifth meeting “acceptable” variances.

Miguel Martin, CEO of Edmonton-based Aurora Cannabis Inc., agreed that the lack of national sampling protocols has resulted in “variability” in interpretation of the accepted testing methodology.

Health Canada told The Globe that is reviewing complaints made about inaccurate potency labels, and the information received will be used to conduct further compliance monitoring this fiscal year.

“The department is currently working with licence holders to address inspection observations and to ensure that the THC content value displayed on the label is representative of the cannabis product,” Ms. Jarbeau said.

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