Restructuring the Obesity Paradigm: Molecular Etiologies, Clinical Complexities, and the Future of Precision Intervention

Obesity is a complex, chronic, and relapsing disease affecting adults globally and continues to rise across all age and socioeconomic groups. Once regarded as a lifestyle issue, obesity is now recognized as a multifactorial condition influenced by multiple factors. This review consolidates current evidence on the dynamic pathophysiology of obesity, highlighting advances in understanding its genetic foundations, hormonal imbalances, gut microbiome disruptions, and the influence of early-life exposures, and emphasizing the systemic impact of obesity through its associations with cardiometabolic diseases, certain cancers, and mental health disorders. Emerging treatment paradigms include glucagon-like peptide-1 and dual agonists, endoscopic and surgical interventions, and microbiota-directed therapies. Advances in artificial intelligence and precision medicine are also redefining individualized care. Despite these developments, obesity remains underdiagnosed and undertreated in many healthcare systems. In high-income regions, the uptake of advanced therapies is limited by fragmented care pathways, in which obesity management is spread across multiple uncoordinated providers, and by affordability barriers due to high costs. In low-resource settings, constrained infrastructure and competing health priorities continue to hinder timely diagnosis and treatment. A shift toward holistic, patient-centered, and equity-driven models of care is essential for effectively addressing the global burden of obesity and improving long-term health outcomes.