Hormones play a pivotal role in regulating weight gain and loss through various physiological mechanisms. Hormones such as insulin, leptin, and ghrelin influence appetite, metabolism, and energy storage. Insulin facilitates the storage of excess glucose as fat, while leptin signals the brain to reduce appetite and increase energy expenditure. Ghrelin, on the other hand, stimulates hunger. Disruptions in hormonal balance can lead to challenges in maintaining a healthy weight, resulting in obesity or weight loss. Understanding hormonal functions offers crucial insights into effective weight management strategies and interventions.