The familiar feeling of intense hunger—often called “the munchies”—following cannabis use isn’t simply a stereotype, but a measurable cognitive response. Latest research published in the Proceedings of the National Academy of Sciences (PNAS) suggests this phenomenon occurs regardless of age, sex, weight, or recent food intake, and could hold clues for treating appetite loss in individuals facing serious medical conditions.
Researchers at Washington State University (WSU) and the University of Calgary collaborated on the study, which examined both human and animal subjects. The findings offer a deeper understanding of the physiological mechanisms behind increased appetite, potentially opening doors for medicinal applications of cannabis for those struggling with conditions like HIV, AIDS, or the side effects of chemotherapy. As Carrie Cuttler, a psychology professor at WSU, explained, “We find a lot of different diseases, conditions and disorders associated with wasting syndromes and lack of appetite, and this study really supports the idea that cannabis can be used medicinally to increase appetite in people who have conditions like HIV, AIDS, or who are on chemotherapy.”
Unpacking the Science Behind Cannabis and Appetite
The research team, led in part by Cuttler, who directs The Health and Cognition (THC) Lab at WSU, and Ryan McLaughlin, a professor in the College of Veterinary Medicine at WSU, conducted a human clinical trial involving 82 volunteers between the ages of 21 and 62 from the Pullman, Washington area. Participants were randomly assigned to vape either 20 or 40 milligrams of cannabis, or a placebo. The study found that, regardless of individual characteristics, those who consumed cannabis ate significantly more food than those in the control group.
“The human study found irrespective of body mass index, time of last food consumption, sex or how much cannabis was consumed, human participants who used cannabis during the trial ate significantly more food,” McLaughlin said. A parallel study conducted at the University of Calgary using rats yielded similar results. Rats exposed to cannabis consistently sought out food, even after already being satiated, demonstrating a heightened motivation to eat.
Beyond Carb Cravings: What Foods Do People Crave?
Interestingly, the research revealed that the increased appetite wasn’t limited to carbohydrate-rich foods, a common assumption about “the munchies.” Whereas the study participants were offered a variety of options, ranging from carbohydrates to proteins and fatty snacks, the preference wasn’t predictable. Cuttler noted a surprising finding: “Beef jerky was one of the No. 1 things intoxicated people gravitated toward, which I don’t understand. Honestly, I would have thought chocolate, chips, Rice Krispies treats – things like that.” Water also ranked high on the list of desired items.
The rat study mirrored this unexpected pattern. Regardless of the food offered, rats under the influence of cannabis consistently worked to obtain it, even if they weren’t hungry. As Matthew Hill, a Calgary researcher involved in the study, explained, “The sober animals are kind of like, ‘I’m full. Why do I care?’ They don’t put in any effort at all. They barely work in any capacity to get access to food. But you get them stoned again, and even though they’re now full and they’ve eaten, they go right back as if they’re starving.”
The Role of the Endocannabinoid System
The study’s significance lies in its contribution to understanding the physiological mechanisms driving appetite stimulation. Researchers focused on the role of endocannabinoids, naturally produced chemicals in the body that regulate various functions, including appetite. These endocannabinoids operate within the endocannabinoid system, primarily in the hypothalamus. THC, the psychoactive component of cannabis, essentially “hijacks” this system, stimulating cannabinoid receptors in the brain and triggering feelings of hunger, even in the absence of physiological need.
Further pharmacological studies at the University of Calgary pinpointed the brain as the primary driver of this effect. Blocking cannabinoid receptors in the peripheral nervous system didn’t impact appetite in rats, but blocking them in the brain did. “That’s what really gives us the opportunity to look at whether This represents something brain-mediated or gut-mediated, and this generally shows ‘the munchies’ are mediated by the brain,” McLaughlin said.
Implications for Medical Treatment
The researchers hope these findings will inform the development of new treatments for appetite loss, a debilitating symptom experienced by individuals with a range of medical conditions. Understanding how cannabis interacts with the brain’s hunger centers could lead to targeted therapies that stimulate appetite without the psychoactive effects of THC. Cuttler emphasized, “There’s very little documentation of the munchies phenomenon, but this paper really starts to tap into some of the mechanisms that might be responsible.”
The study, published in December 2025, was approved by both the Washington State University Institutional Review Board (IRB) and the Food & Drug Administration (FDA), according to documentation available through Proceedings of the National Academy of Sciences.
Researchers will continue to investigate the specific neural pathways involved in cannabis-induced appetite stimulation, with the goal of developing safe and effective treatments for those struggling with appetite loss. The next steps involve exploring the long-term effects of cannabinoid receptor stimulation and identifying potential drug targets for appetite regulation.
What are your thoughts on this new research? Share your comments below, and consider sharing this article with others who might identify it informative.
