Obesity: An epidemic hidden in plain sight

Obesity has emerged as a global epidemic, affecting millions and contributing to numerous comorbidities, including diabetes, cardiovascular diseases, and certain cancers.^[1] Despite increasing awareness of its prevalence and health implications, current clinical practice often falls short in effectively addressing and managing obesity. Recent research underscores the complexity of obesity, recognizing it as a chronic disease influenced by a multitude of factors, including genetics, environment, and individual behaviour.^[2] The American Diabetes Association (ADA) and the European Association for the Study of Diabetes (EASD) recommend comprehensive strategies that incorporate lifestyle changes, pharmacotherapy, and surgical options tailored to individual patient needs.^[3]

Clinical guidelines play a crucial role in shaping obesity management. The American Association of Clinical Endocrinologists and the American College of Endocrinology have established comprehensive guidelines that advocate for a multifaceted approach to obesity treatment, encompassing medical, behavioural, and surgical interventions.^[4] However, a significant limitation exists in that as many guidelines primarily emphasize continuous energy restriction and lifestyle interventions, often neglecting innovative dietary strategies such as intermittent energy restriction that may yield comparable results.^[5] The integration of pharmacotherapy into obesity management is increasingly recognized as essential, particularly for patients who do not achieve adequate results through lifestyle changes alone. The American Gastroenterological Association’s guidelines emphasize the importance of combining medication with lifestyle interventions to enhance treatment efficacy.^[6] Furthermore, studies such as the STEP- 3 and STEP-8 trials demonstrate the effectiveness of newer pharmacological agents, such as semaglutide, in combination with behavioural therapy for weight management.^[5,7]

The prevalence of childhood obesity has reached alarming levels, necessitating urgent action. Research highlights the need for multifaceted approaches that involve community, school, and healthcare interventions to address this issue effectively.^[8] Smith et al. emphasize the psychological and health comorbidities associated with childhood obesity, indicating that comprehensive management strategies should also consider mental health aspects.^[9] Pregnancy-related disorders, like intrauterine growth restriction (IUGR), have an impact on long-term outcomes and increase the chances of metabolic diseases like obesity and metabolic syndrome.^[10]

In India and other low-middle-income countries (LMICs), low birth weight (LBW) and malnutrition have remained critical public health issues. The Nutrition Transition model is particularly relevant in understanding the rapid shifts in dietary patterns and health outcomes in LMICs like India. Ford et al. identified the transition from undernutrition to overnutrition as a significant concern, particularly in nations facing a double burden of malnutrition, characterized by the coexistence of stunting and obesity. The authors argue that rising consumption of ultra-processed foods is a key driver of obesity, which is exacerbated by increased sedentary lifestyles and reduced physical activity.^[11] Excessive screen time and sedentary behaviour are critical factors contributing to the obesity epidemic among children. LeBlanc et al. report that children today are averaging 8.6 hours of sedentary activity daily, with many not adhering to recommended screen time guidelines. This sedentary lifestyle correlates with poor weight status, emphasizing the need for interventions that promote physical activity and reduce screen time.^[12] Similarly, Fang et al. reported that, children exceeding two hours of screen time daily have a significantly higher risk of overweight and obesity. These findings underscore the urgency of addressing screen time as a modifiable risk factor for childhood obesity.^[13] Rauber et al. provide evidence of a strong correlation between ultra-processed food intake and obesity risk in various populations. This trend is emerging in India, where dietary patterns are shifting towards more processed food consumption.^[14] Templin et al. elucidate how this transition disproportionately affects poorer populations, necessitating targeted public health strategies to promote healthier eating habits.^[15] Hence, childhood obesity in India requires strengthening regional public health interventions, etiological research, and socioeconomic development.^[16]

Research indicates that traditional obesity management strategies may be fragmented and insufficient when addressing the complexity of the epidemic. Bagnall et al. advocate for whole systems approaches (WSAs) in public health interventions, suggesting that coordinated actions across various sectors are crucial for successful obesity management.^[17] This perspective calls for a paradigm shift in clinical practice, emphasizing the need for community-based strategies that engage multiple disciplines.^[18]

Despite the considerable body of research, significant knowledge gaps remain in our understanding of obesity and its management. There is a need for further research into the pathophysiology of obesity, particularly regarding signalling pathways and potential precision medicine approaches.^[19] Moreover, translational research is essential to implement evidence-based interventions at scale, particularly for childhood obesity.^[20] Future studies should also explore the impact of weight stigma in clinical practice, as it can significantly affect treatment outcomes and patient engagement.^[21] Understanding and addressing the psychological consequences of obesity will be vital for developing effective treatment strategies.

Addressing obesity in clinical practice requires a comprehensive approach that integrates lifestyle changes, pharmacotherapy, and community-based interventions. Current clinical guidelines need to expand beyond traditional methods to incorporate innovative strategies and address the complexities of obesity as a chronic disease. Future research should aim to fill existing knowledge gaps and promote coordinated efforts across sectors to overcome this epidemic effectively. Only through a concerted and holistic approach can we hope to mitigate the profound health risks associated with obesity and improve patient outcomes.