A medical marijuana testing lab in Kalamazoo is under investigation for inaccurately reporting test results to state regulators, Marijuana Regulatory Agency Director Andrew Brisbo said Wednesday.

State regulators issued a bulletin Wednesday advising medical marijuana patients and caregivers to check the labels on their marijuana products to see if they had been tested by The Spott, as they might contain more THC or less THC than the label indicates.

The Spott is one of six state-licensed safety compliance facilities in Michigan. It started its operations in 2014, and was allowed to stay open while applying for a state license in 2017.

State regulators had received a complaint about inconsistent results from The Spott from another licensee, Brisbo said.

“We’ve identified our problems and we’ve corrected them and we’re going on from here,” said Linda Palmatier, owner of The Spott, to MLive. “There were some inaccurate numbers; we worked with them (the MRA) to solve it.”

Palmatier said she was told Wednesday morning that the investigation was over. She declined to discuss the specific issues in the lab that led to the inaccurate data.

From May 3 to July 11, The Spott entered inaccurate THC potency test results in to the statewide monitoring system, officials said. That means consumer products may have been mislabeled with inaccurate potency information.

During that time The Spott was testing both regulated medical marijuana and caregiver products, Brisbo said.

Patients and caregivers should check the labels on their marijuana products, as the label will indicate the testing date and location, officials said.

Brisbo said the impact of the investigation is reasonably large in scope, as there are few operating safety compliance facilities in Michigan.

“There’s a potential that the products are in many different facilities,” Brisbo said.

The investigation remains open into The Spott, Brisbo said. Officials are asking people to report any adverse reactions after ingesting marijuana products to the Marijuana Regulatory Agency by emailing MRA-enforcement@michigan.gov or by calling 517-284-8597.

-- Amy Biolchini is the marijuana beat reporter for MLive. Contact her with questions, tips or comments at abiolch1@mlive.com. Read more from MLive about medical and recreational marijuana.