Appetite regulation is a research area that focuses on understanding the complex physiological and psychological processes that control food intake and energy balance in humans and animals. This includes studying the role of hormones, neurotransmitters, and neuropeptides in regulating hunger and satiety, as well as the influence of external factors such as food availability, palatability, and social cues on eating behavior. Researchers in this field aim to identify key mechanisms involved in appetite regulation and how they may be targeted for the treatment and prevention of obesity and eating disorders.