The Massachusetts Cannabis Control Commission said in August that 13 of 63 cannabis flower products sampled in a shelf audit tested outside the state’s accepted THC label range, Boston.com reported. The products came from retail stores and medical dispensaries, and a label is considered accurate if measured THC falls between 75% and 125% of the labeled amount. The other 50 products were within that range.

The commission placed holds on the 13 products, which may need to be retested, recalled or destroyed depending on the circumstances. Patients and consumers who bought an affected product can contact the producer listed on the label. Commission Chair Chris Harding said accurate potency information is a health and safety matter for medical patients who rely on it for dosing.

The commission also said the audit will help it move toward random testing for contaminants, and that it planned to begin updating its testing rules in September.