Hormones, such as insulin, leptin, and ghrelin, play a critical role in body weight regulation by influencing appetite and energy balance. Insulin manages glucose levels and fat storage, while leptin signals satiety to the brain, reducing hunger. Ghrelin, on the other hand, is known as the “hunger hormone” and stimulates appetite. Disruptions in these hormones can lead to weight gain or loss, making their regulation essential for maintaining a healthy weight and preventing obesity-related conditions.