WHY IT MATTERS: If you use cannabis medicinally and experience unwanted appetite changes or, conversely, rely on cannabis to maintain healthy weight during illness, emerging brain science research may help your physician fine-tune your cannabinoid formulation and dosing to better control these effects. CLINICAL OVERVIEW: The neuroscience of cannabis-induced appetite stimulation involves complex interactions between cannabinoids and the brain’s endocannabinoid system, particularly through CB1 receptor activation in the hypothalamus and olfactory regions that heighten sensory perception of food and override satiety signals. In clinical practice, this appetite-stimulating effect is one of the most well-established therapeutic applications of cannabis, benefiting patients with cachexia, chemotherapy-induced nausea, and wasting syndromes.