CBD's propensity to promote hunger may be due to its effect on serotonin receptors. 5-HT receptors are critical in appetite and digestion, and studies show that CBD may help improve appetite via lowering symptoms of an upset stomach rather than directly increasing sensations of hunger. Some research has also indicated that CBD may increase the amount of insulin produced by the pancreas which may lead to increased feeling of hunger. However, more research is needed to determine exactly how CBD affects eating behavior. In addition to these effects on serotonin and insulin, there is some evidence that CBD may affect other neurotransmitters involved in mood regulation including dopamine and glutamate. Dopamine is responsible for causing a feeling of pleasure while glutamate is involved in creating feelings of happiness. Therefore, by altering levels of these chemicals, CBD can change how you feel overall which may explain why it can make you feel hungry even though you have enough energy. Finally, CBD has been shown to inhibit activity in brain cells that control movement which could cause someone who uses it to feel like they need to eat more frequently. Studies have also indicated that CBD may interfere with certain hormones involved in appetite regulation making them work less effectively. For example, one study showed that when given to rats it altered levels of leptin (which regulates appetite) and ghrelin (which creates feelings of hunger).