Researchers from McGill University have raised concerns about the presence of toxic fungi and residues in commercially sold cannabis, even after undergoing industry-standard irradiation. While this may not pose a significant risk to most users, individuals with compromised immune systems, such as those using cannabis for medical purposes, could face serious health implications.
The study, led by Professor Saji George, revealed that gamma irradiation, a common sterilization method for cannabis production, does not completely eradicate toxic fungi or their residues. Despite meeting industry quality control standards, the researchers found that certain samples still contained harmful elements undetectable by standard testing methods.
George emphasized that producers and retailers are compliant with existing regulations, but the current standards may be inadequate to safeguard vulnerable consumers. He highlighted the potential dangers of smoking contaminated cannabis, particularly for immunocompromised individuals, as these substances can easily colonize the lungs and pose serious health risks.
Although there are limited documented cases of cannabis-related illnesses from toxic fungi, the researchers stress the importance of implementing stricter quality standards for both medical and recreational cannabis. They are also exploring innovative solutions, such as using beneficial bacteria to prevent harmful fungi growth during cultivation and processing.
The study’s findings, published in the journal Toxins, underscore the need for heightened vigilance in all stages of cannabis production to ensure consumer safety.
