The Massachusetts Department of Public Health has suspended retail sales of all medical marijuana products at Healthy Pharms, a medical marijuana dispensary in Georgetown, after a pesticide was detected in a product.

Healthy Pharms notified the Department of Public Health that a lab test had detected a pesticide -- bifenthrin -- in a sample batch of product. Bifenthrin is commonly used in food products, but marijuana dispensaries are not allowed to use pesticides to grow marijuana.

Marc Nascarella, DPH's chief toxicologist, said after the failed test report, Healthy Pharms immediately quarantined all of the affected product, as it is required to do by state law.

No medical marijuana from this batch was sold to patients.

DPH and the Department of Agricultural Resources are looking into the issue.

"We want to ensure that Healthy Pharms takes the appropriate corrective action to prevent this from happening in the future," Nascarella said in a statement.

Healthy Pharms received approval to sell medical marijuana in March 2017. It grows marijuana in Georgetown and has dispensaries in Georgetown and Cambridge. The facility supplies less than 4 percent of the state's medical marijuana, according to the DPH.

Healthy Pharms also sells products to two other marijuana retailers, Theory Wellness and Revolutionary Clinics.

Brandon Pollock, CEO of Theory Wellness, said the vast majority of Theory Wellness's products are produced in-house. "This will not have a significant impact on our ability to serve our patients with a consistent supply of high quality medical cannabis products," Pollock said.

In fiscal 2018, the Department of Public Health conducted four inspections of Healthy Pharms. A public records request for records of all medical marijuana violations, for a January story, did not turn up any violations at Healthy Pharms from those inspections.

This story was updated with comments from Pollock.