Michigan labs keep marijuana safe with microscopes and microwaves Updated 1:10 PM; Facebook Share They can make the difference between a lucrative harvest or its total destruction. They establish how potent the products are and ensure that vaping cartridges aren’t laden with heavy metals, that marijuana is free of mold and that more than 50 different pesticides or potentially deadly salmonella aren’t in edibles. Michigan’s stringent testing requirements are looked upon as a nuisance by some in the cannabis industry, but illustrate a main function of marijuana regulation: product safety and consistency. At Jackson’s Infinite Chemical Analysis Labs that opened in July 2020, hundreds of colorful, bear-shaped gummy candies containing THC lay atop each other in a cardboard box awaiting very serious scientific analysis. Once-white lab coats smeared with brown hash oil hang from a nearby rack.