Ghrelin also known as GHRL is a powerful appetite stimulant and plays a vital role in regulating energy balance and appetite by stimulating growth hormone release from the pituitary gland. This acylated peptide is primarily produced in the stomach and influences various physiological processes, including glucose metabolism and gastrointestinal motility. Ghrelin′s interaction with growth hormone secretagogue receptor (GHS-R) is crucial for function, as this interaction not only promotes growth hormone release but also modulates appetite and energy expenditure. The gene encoding ghrelin is located on human chromosome 3p26-p25, and expression is tightly regulated, making ghrelin an important target for research in metabolic disorders and obesity.