The neurotransmitter associated with bulimia nervosa is serotonin or 5-HT.
Bulimia nervosa is a serious eating disorder which is characterized by a cycle comprised of episodes of rapid consumption of large amount of food and compensatory behaviour, such as fasting, excessive exercise and even vomiting.
Serotonin is a neurotransmitter found in the gastrointestinal tract and central nervous system and it is thought to be connected to feelings of well-being and happiness. More specifically, serotonin regulates mood, appetite and sleep. Regarding the regulation of appetite, serotonin promotes the feeling of satiety. Bulimia nervosa is associated with low levels of serotonin.