EAST LANSING, Mich. – The munchies seem to not matter. According to new evidence from Michigan State University, adults who smoke marijuana weigh less compared to those who don't.
The findings, published in the International Journal of Epidemiology, are contrary to the belief that marijuana users who have a serious case of the munchies will ultimately gain more weight.
Over a three-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, according to the lead author Omayma Alshaarawy.
Alshaarawy says the study builds on mounting evidence that this opposite effect occurs. Results also suggest that new and persistent users are less likely to be overweight or obese, overall.
“We found that users, even those who just started, were more likely to be at a normal, healthier weight and stay at that weight,” she said. “Only 15% of persistent users were considered obese compared to 20% of non-users.”
Researchers used data from the National Epidemiologic Survey of Alcohol and Related Conditions and looked at the Body Mass Index, or BMI, of 33,000 participants, ages 18 and older, then compared the numbers.
So, what is it about marijuana that seems to affect weight? Alshaarawy indicated it’s still relatively unknown but it could be several factors.
“It could be something that’s more behavioral like someone becoming more conscious of their food intake as they worry about the munchies after cannabis use and gaining weight,” she said. “Or it could be the cannabis use itself, which can modify how certain cells, or receptors, respond in the body and can ultimately affect weight gain. More research needs to be done.”
Alshaarawy cautions, though, that marijuana should not be considered a diet aid, “There’s too many health concerns around cannabis that far outweigh the potential positive, yet modest, effects it has on weight gain,” she said. “People shouldn’t consider it as a way to maintain or even lose weight.”
The research was funded by the National Institutes of Health.
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