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Obesity is a complex, multifactorial condition and one of the leading preventable causes of morbidity and mortality, with a profound societal impact. Driven by genetic, socioeconomic, dietary, and lifestyle factors, obesity's prevalence has risen with modern shifts toward caloric excess and sedentary behavior. Additional contributors include racial and socioeconomic disparities, prenatal influences, and environmental changes promoting processed food consumption and decreased physical activity. Obesity is associated with significant comorbidities, including metabolic syndrome, diabetes, and hypertension, and can be exacerbated by conditions like hypothyroidism, Cushing syndrome, and certain medications, creating a need for comprehensive, personalized approaches to management. From a clinical perspective, effective long-term obesity management requires a graded strategy involving caloric restriction, physical exercise, and behavior modification. Understanding obesity's multifactorial nature is essential for proper diagnosis and treatment. This activity for healthcare professionals is designed to enhance the learner's in-depth knowledge of obesity’s epidemiology, etiology, and evidence-based strategies for prevention and treatment and to implement an appropriate interprofessional management approach to improve patient outcomes. Objectives: Differentiate between primary obesity and weight gain due to secondary causes, such as hypothyroidism, Cushing syndrome, and medication side effects. Apply screening for obesity-related comorbidities to inform management. Implement evidence-based guidelines for obesity management, integrating lifestyle modifications, dietary changes, and physical activity recommendations. Apply interprofessional team strategies to improve care coordination and outcomes in patients with obesity. Access free multiple choice questions on this topic.

For much of the 20th century, cigarette smoking was the most common preventable cause of morbidity and mortality. However, a decrease in tobacco use and a simultaneous increase in obesity has been observed.[1][2] In simple terms, obesity occurs when caloric intake exceeds energy expenditure.[3] This chronic and often progressive condition is debilitating and has far-reaching implications extending beyond the afflicted individual and into society.[4] The causes of obesity involve genetics, socioeconomic level, diet, physical activity, medications, comorbid conditions, and culture.[5] Genome-wide databases have identified more than 500 specific gene loci related to the development of obesity. Those genes can have profound lifelong implications (eg, Prader-Willi syndrome and Bardet-Biedl syndrome).[6] Researchers have discovered racial disparities in the development of obesity.[7] Various prenatal and childhood factors and normal aging are associated with the development of adult obesity. In addition, those with sedentary lifestyles tend to make poor choices in food selection and adopt a daily caloric intake that does not match their energy expenditure. As a result, this caloric excess is the primary driver for developing obesity.[8] Health professionals should be aware of various medications known to cause obesity. In addition, various comorbid conditions affecting the hypothalamic-pituitary axis (HPA) can contribute to obesity onset. Recently, investigators have become interested in the role of the gut microbiome in the development of obesity, particularly in the proportion of 2 bacterial strains, Bacteroides and Firmicutes, in the gut microbiome and the role of endocrine-disrupting chemicals.[9][10][11] Further, the development of chronic obesity produces a cascade of downstream molecular targets, leading to the development of dyslipidemia, hypertension, and diabetes. This unique cluster of conditions in conjunction with obesity has been coined metabolic syndrome and substantially increases morbidity and mortality.[12] The microbiome can contribute to obesity by modifying metabolic pathways, including the endocannabinoid system, which impacts energy use and can change the sensation of satiety. Some gut bacteria can also digest fiber and starch through fermentation and hydrolysis.[13]

Health professionals should be aware of various medications known to cause obesity. In addition, various comorbid conditions affecting the hypothalamic-pituitary axis (HPA) can contribute to obesity onset. Recently, investigators have become interested in the role of the gut microbiome in the development of obesity, particularly in the proportion of 2 bacterial strains, Bacteroides and Firmicutes, in the gut microbiome and the role of endocrine-disrupting chemicals.[9][10][11] Further, the development of chronic obesity produces a cascade of downstream molecular targets, leading to the development of dyslipidemia, hypertension, and diabetes. This unique cluster of conditions in conjunction with obesity has been coined metabolic syndrome and substantially increases morbidity and mortality.[12] The microbiome can contribute to obesity by modifying metabolic pathways, including the endocannabinoid system, which impacts energy use and can change the sensation of satiety. Some gut bacteria can also digest fiber and starch through fermentation and hydrolysis.[13] The above-reviewed factors are quintessential to understanding how to treat this chronic disease. Previously, healthcare professionals have struggled with understanding these known causes of obesity. These deficiencies have led to missed opportunities and failure to educate patients on up-to-date treatment options for chronic obesity.[14]

Effectively managing obesity requires an interprofessional, patient-centered approach that encourages collaboration among advanced clinicians, nurses, pharmacists, dietitians, physical therapists, social workers, and psychologists. Advanced clinicians provide medical expertise and motivation, while dietitians create tailored nutritional plans, and physical therapists guide patients in safe, effective physical activity. Psychologists address underlying mental health conditions, offering strategies to support emotional well-being and behavior change. Social workers help patients access essential resources, eg, mobility aids like walkers or wheelchairs, financial assistance for medications, or gym memberships. Nurses ensure continuity of care by maintaining regular contact, educating patients, and monitoring adherence to treatment plans. This coordinated team approach fosters clear communication among healthcare clinicians, enhances patient outcomes, improves safety, and supports long-term weight management strategies.

The roles of nursing, allied health, and interprofessional healthcare teams are vital to patient-centered care. As highlighted above, the strategies for reversing obesity in patients require routine follow-up and consistent evaluation by healthcare professionals. Once the plan is implemented and approved by the patient's clinician, support staff can perform routine follow-ups and monitor patients regularly. An example of such a monitoring program might be to check hemoglobin A1c every 3 months, lipid panel every 6 months, and assess patients' barriers to weight loss. Support staff can communicate the results to the patient's clinician to modify the plan and ensure the patient remains on track. Patients with chronic obesity can often have an unhealthy relationship with food. Cognitive-behavioral therapy can be a valuable tool for helping patients reconcile feelings that may lead to overeating. Various technological applications exist to assist patients with direct access to a therapist. Applications that measure daily body weight and count calories are primarily effective because they draw users' attention to lifestyle-related details that influence weight gain and loss. For most, cataloging daily caloric intake can be burdensome and arduous, so it is crucial to follow up with patients during their weight-loss journey consistently. Follow-up is the quintessential element of ensuring adherence to a weight-loss plan. Therefore, it is essential to set expectations that this will require consistent virtual or in-person meetings to ensure continued compliance when beginning the weight-loss journey. If the patient is unwilling to agree to follow-up, the patient will likely fail and revert to previous poor lifestyle choices.

Telehealth can be a valuable contemporary strategy for managing new patients to a lifestyle modification regimen.[74] Quick face-to-face meetings with weight reporting can be a helpful tool for patients to benchmark their progress and find new motivation.