Scientific discussion of leptin and obesity mechanisms

Scientific discussion of leptin and obesity mechanisms The passage is a technical summary of leptin research with no mention of political figures, financial transactions, or misconduct. It offers no actionable investigative leads. Key insights: Leptin is a hormone secreted by fat cells proportional to body mass.; Leptin receptors in the hypothalamus regulate appetite and energy expenditure.; Mutations in leptin or its receptor cause severe obesity in mice.