The brain plays a central role in regulating appetite and metabolism, making the neurobiology of obesity a key area of study. The hypothalamus integrates signals from hormones like leptin and ghrelin to control hunger and energy expenditure. However, disruptions in these pathways, often influenced by genetic factors, chronic stress, and environmental triggers, contribute to overeating and weight gain. The reward system, involving dopamine-driven responses to highly palatable foods, reinforces compulsive eating behaviors. Additionally, neuroinflammation and insulin resistance in the brain have been linked to obesity-related cognitive decline. Understanding how neural circuits influence food intake and metabolism provides insight into developing targeted treatments, including neuromodulation therapies and pharmacological interventions aimed at restoring proper brain-body communication.