The findings revealed that the cannabis users were less likely to be overweight or obese. “Over a 3-year period, all participants showed a weight increase, but interestingly, those who used marijuana had less of an increase, compared to those that never used,” reports the lead author. According to Alshaarawy, the findings were surprising since cannabis is a known appetite stimulant. “Our study builds on mounting evidence that this opposite effect occurs,” she explained.