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Harrison's PodClass, produced by McGraw Hill, is hosted by Dr. Cathy Handy Marshall and Dr. Charlie Wiener from The Johns Hopkins School of Medicine. This podcast delivers in-depth discussions on diverse medical topics through a conversational, case-based format that reflects the tradition of Harrison’s Principles of Internal Medicine. Each episode typically centers around a real or hypothetical patient case, allowing listeners to see how textbook principles are applied to complex, real-world scenarios encountered in internal medicine.
In Episode 148, published on May 29, 2025, the focus is on a 55-year-old man with obesity. The case serves as a springboard for discussing the diagnosis, associated medical conditions, and considerations in treatment. This approach is characteristic of the podcast’s style—anchoring clinical knowledge in relatable patient stories and decision-making processes.
One of the central features of the Harrison’s PodClass style is the systematic breakdown of each clinical problem. For obesity, the evaluation begins with a focused history that zeroes in on lifestyle factors. Dr. Marshall and Dr. Wiener emphasize the importance of discussing the patient’s diet, level of physical activity, sleep patterns, and stressors. They explain that understanding these elements provides crucial insights into the causes and perpetuating factors behind a patient’s weight gain, allowing interventions to be logically tailored.
The physical examination is discussed as a step that helps determine both the degree and type of obesity. The hosts point out that this is not a one-size-fits-all condition. For instance, the pattern of fat distribution—whether visceral or subcutaneous—can have distinct implications for metabolic risk. Dr. Wiener describes how central obesity, characterized by increased abdominal circumference, is more closely linked to complications like type 2 diabetes and cardiovascular disease than peripheral obesity.
Assessment of comorbid conditions is a critical step that the hosts frequently revisit. In the 55-year-old man’s case, the discussion covers the heightened risks of hypertension, type 2 diabetes, dyslipidemia, obstructive sleep apnea, nonalcoholic fatty liver disease, degenerative joint disease, and cancers linked to obesity. Dr. Marshall provides concrete numbers, reminding listeners that over 70% of U.S. adults are now classified as overweight or obese, a proportion larger than the population of France or the United Kingdom combined. The rising rates among children and adolescents are also addressed, highlighting the public health scale of the epidemic.
The 2023 release of the American Academy of Pediatrics’ first Clinical Practice Guideline for the Evaluation and Treatment of Children and Adolescents With Obesity is brought into the conversation. This guideline marks a shift toward early, intensive care that focuses on the ‘whole child,’ not just weight metrics. The hosts discuss how pediatricians are now called to act sooner, with comprehensive assessments and multidisciplinary management strategies that involve nutritionists, behavioral specialists, and the family unit.
Another hallmark of the Harrison’s PodClass style is the focus on sensitive communication. The hosts reference explicit guidance that the term “obesity” carries a significant pejorative meaning for many patients, often evoking feelings of judgment and blame. Dr. Marshall notes that many patients prefer language such as “weight,” “excess weight,” or “unhealthy weight” when discussing their health. The podcast stresses the importance of approaching the topic nonjudgmentally and collaboratively, echoing the written advice: “The first step in taking an obesity-focused history is to approach the topic in a sensitive manner.” This sensitivity is not only a matter of empathy but also improves patient engagement and adherence to therapy.
When discussing the causes of obesity, the podcast does not limit itself to behavioral factors. The hosts lay out secondary causes that should be ruled out in certain cases. They discuss polycystic ovarian syndrome, hypothyroidism, Cushing’s syndrome, and hypothalamic disease as medical conditions that can drive weight gain. Medications are also highlighted—drugs such as insulin, sulfonylureas, thiazolidinediones, steroid hormones, antipsychotic agents, mood stabilizers, antidepressants, and antiepileptic drugs are all named as potential contributors to secondary obesity. This comprehensive review equips listeners to think broadly and to avoid diagnostic anchoring.
The assessment of readiness for change is another key step discussed by Dr. Wiener and Dr. Marshall. The podcast makes clear that even the most effective therapies are likely to fail if a patient is not prepared to make lifestyle adjustments. The hosts discuss ways to assess readiness, such as open-ended questions about prior weight loss attempts, perceived barriers, and confidence in making changes. This readiness assessment allows clinicians to apply motivational interviewing techniques and set achievable, patient-centered goals.
The style of Harrison’s PodClass is also marked by the integration of current guidelines and landmark events into its clinical reasoning. For example, the hosts reference the 2023 AAP guideline as a turning point that now shapes pediatric obesity care. They walk listeners through the implications, such as the need for earlier screening, family-based interventions, and coordinated care with multiple specialties. This contextualization connects day-to-day practice with broader trends in medicine.
The podcast frequently pauses to address knowledge gaps and misconceptions among both patients and providers. In discussing the complications of obesity, the hosts clarify that conditions such as nonalcoholic fatty liver disease and obstructive sleep apnea are often underdiagnosed. For instance, nonalcoholic fatty liver disease is now the leading cause of chronic liver disease in many developed countries, and it is strongly associated with visceral obesity.
Quantitative details are woven throughout the podcast. When discussing prevalence, the hosts cite the figure that more than 70% of U.S. adults are overweight or obese. They compare these numbers to international populations and past decades, showing a clear trend of escalation. The discussion of comorbidities includes specific risks: for example, people with obesity have a two to threefold higher risk of developing type 2 diabetes compared to those at a healthy weight, and the risk of hypertension is similarly elevated.
The podcast does not shy away from the practical aspects of management. Dr. Marshall and Dr. Wiener break down the elements of an effective weight management plan: nutritional counseling, physical activity recommendations, behavioral therapy, and—when appropriate—pharmacologic or surgical interventions. They discuss the evidence base for various interventions, such as the benefit of reducing caloric intake by 500 to 1,000 kilocalories per day, which can produce an average weight loss of 8% to 10% over 6 months in motivated adults.
Harrison’s PodClass regularly references the complexity and chronicity of obesity as a disease process. The hosts point out that long-term success rates for weight loss are low with lifestyle change alone, underscoring the need for ongoing support, follow-up, and, in some cases, referral to specialized programs. They explore how social determinants of health, such as food insecurity and neighborhood environment, can hinder progress, and how clinicians can advocate for systemic changes.
One notable feature is the careful attention to language during patient encounters. The podcast highlights that using neutral terms not only reduces stigma but also improves the therapeutic alliance. Patients report feeling more supported and less judged when clinicians use words like “unhealthy weight” rather than “obesity” or “morbid obesity.”
In Episode 148, Dr. Wiener relays that evaluation is incomplete unless secondary causes—like medication-induced weight gain or endocrine disorders—are specifically considered. He notes that failure to recognize these can lead to missed diagnoses and suboptimal outcomes.
The podcast’s commitment to evidence-based practice is matched by equal attention to the human experience of illness. In one segment, Dr. Marshall recounts patient feedback on language, quoting, “I just wish my doctor would talk about my weight the way she talks about my blood pressure.” This feedback has prompted many clinics to reevaluate their obesity management protocols and patient education materials.