Regulated cannabis goes through testing and traceability, so you know what...

https://www.slideserve.com/bandarnpto/is-prescribed-medical-cannabis-in-the-uk-actually-tested

Regulated cannabis goes through testing and traceability, so you know what you’re getting. This reduces guesswork about potency and safety. Unregulated products may contain unsafe levels of pesticides or mould, making them riskier to use