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Life sciences · Journal article
Biomedicines · September 11, 2026
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Obesity has become a major global public health concern, with prevalence rates rising dramatically over the past several decades and affecting more than one billion people worldwide. The increasing burden of obesity has been largely driven by sedentary lifestyles and the consumption of energy-dense, nutrient-poor diets, although its etiology is multifactorial, involving complex interactions among genetic, metabolic, endocrine, and environmental factors. Beyond excess adiposity, obesity is closely associated with numerous chronic diseases, including cardiovascular disease (CVD), type 2 diabetes mellitus (T2DM), hypertension, cancer, and chronic inflammatory disorders. Emerging evidence indicates that oxidative stress plays a pivotal role in the pathogenesis of obesity and its related metabolic complications. Reactive oxygen species (ROS) and reactive nitrogen species (RNS), which are generated during normal cellular metabolism, serve important physiological functions in cell signaling and redox regulation. However, excessive production of these reactive species or impairment of endogenous antioxidant defense systems disrupts redox homeostasis, leading to oxidative damage to lipids, proteins, and nucleic acids. Such alterations contribute to cellular dysfunction, chronic inflammation, and disease progression. In this context, dietary antioxidants have attracted considerable attention due to their ability to neutralize free radicals, inhibit lipid peroxidation, and restore redox balance. Natural antioxidants derived from fruits, vegetables, and other plant-based foods may act individually or synergistically to enhance cellular defense mechanisms against oxidative stress. Furthermore, growing evidence suggests that antioxidant-rich dietary patterns may offer protective effects against obesity-associated metabolic disturbances and chronic diseases. However, clinical benefits of isolated antioxidant supplementation remain inconsistent and appear to depend on dose, bioavailability, baseline redox status, disease stage, and the preservation of physiological redox signaling. Understanding the molecular mechanisms underlying antioxidant-mediated regulation of redox homeostasis may facilitate the development of nutritional strategies for obesity prevention and management, while contributing to the reduction in oxidative stress and obesity-related disease burden and the promotion of long-term health.