Using data from the California Health Interview Survey, this study describes changes in cannabis use prevalence, frequency, and methods among adults in California from 2017 through 2024, spanning the year before and seven years after the onset of retail availability.

The study showed that prevalence of past-year and past-month cannabis use among adults in California remained largely stable across the eight-year study period spanning the onset of retail availability of non-medical cannabis products. Frequency of past-month use also remained stable. Methods of use shifted notably, however, with declines in combustible methods and corresponding increases in edible consumption. Past-month use increased among middle-aged and older adults, particularly those aged ≥75 years, while remaining unchanged among young adults (18–25 years).