Hormones play a critical role in regulating weight by influencing metabolism, appetite, and fat storage. Key hormones include insulin, which regulates blood sugar levels and promotes fat storage, and leptin, which signals fullness to the brain. Conversely, ghrelin stimulates hunger. Imbalances in these hormones can lead to increased appetite and decreased energy expenditure, contributing to weight gain. Moreover, stress hormones like cortisol can promote fat accumulation, especially around the abdomen. Understanding these hormonal influences can help individuals make informed choices for weight management.