"Hormones responsible for weight gain" is a critical topic in understanding the physiological factors contributing to obesity and excess body fat. Several hormones play pivotal roles in regulating appetite, metabolism, and fat storage. Key hormones involved in weight gain include insulin, which regulates blood sugar levels and can promote fat storage when levels are consistently high. Leptin, a hormone produced by fat cells, helps control hunger and metabolism. Ghrelin, often referred to as the "hunger hormone," stimulates appetite. Additionally, cortisol, produced during stress, can lead to weight gain when elevated over prolonged periods. Imbalances in thyroid hormones and sex hormones, like estrogen and testosterone, may also impact body weight. A comprehensive understanding of these hormonal influences is essential for effective weight management and overall health.