How sex and age reshape cannabis effects in older adults

This study examined how age and biological sex jointly influence cannabis use patterns and mental health outcomes in middle-aged and older adults (ages 35-78). Researchers collected self-reported data on cannabis use behaviors, cannabis use disorder (CUD) symptoms, mental health, memory, sleep quality, and physical health from 107 cannabis users. The key finding revealed a significant interaction between age and sex: among female participants, cannabis use disorder symptoms decreased with age and mental health improved, but these beneficial age-related trends were not observed in male participants. These differences may relate to how the endocannabinoid system—which naturally declines with age and is modified by biological sex—influences cannabis's effects in the body.

The researchers also explored whether the reason for cannabis use mattered, comparing medical-only users, recreational-only users, and those using cannabis for both purposes. Preliminary findings suggest that medical-only cannabis users may experience a steeper age-related decline in CUD symptoms compared to recreational or hybrid users, though these results require further confirmation. This distinction is important because it suggests the motivation behind cannabis use—treating a specific medical condition versus recreational enjoyment—may shape how cannabis affects users as they age.

The study's findings have practical implications for personalized cannabis safety and clinical care in aging populations. Since age-related benefits appeared primarily in female users, healthcare providers should consider sex-specific differences when counseling middle-aged and older adults about cannabis. Additionally, understanding whether someone uses cannabis for medical or recreational reasons may help predict potential outcomes. The authors emphasize that as the population ages and cannabis becomes more widely available, recognizing these sex and age-related patterns is crucial for developing safer, more individualized treatment recommendations and ensuring cannabis use doesn't inadvertently harm older adults' mental health.