When cannabis is regulated, it undergoes strict testing for things like mould...

https://bizzmarkblog.com/can-unregulated-cannabis-contain-other-contaminants-besides-mould/

When cannabis is regulated, it undergoes strict testing for things like mould and pesticides, giving you clear information on potency and safety. Unregulated products often lack this oversight, which means you can’t be sure what you’re getting