Peanut allergy affects about 2% of people in the US and most commonly develops in early childhood. Peanut introduction during infancy has led to decreased prevalence of peanut allergy. Author Elissa Abrams, MD, MPH, of the University of Manitoba joins JAMA Deputy Editor Kristin Walter, MD, MS, to discuss the clinical presentation and methods to diagnose, treat, and decrease the risk of peanut allergy.

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Overweight and obesity may cause 10% of new cancer diagnoses annually in the US. In this JAMA Review in the Translational Science series, author Neil Iyengar, MD, of Emory University discusses the biological pathways that may promote cancer in people with overweight or obesity and potential therapies with JAMA Deputy Editor Mary McDermott, MD.

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Chronic noninfectious diarrhea affects approximately 6% to 7% of adults in the US and significantly impairs quality of life. Author William Chey, MD, of the University of Michigan joins JAMA Deputy Editor Mary M. McDermott, MD, to discuss strategies for diagnosis and treatment of chronic, noninfectious diarrhea.

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Accurate assessment of intravascular volume facilitates decisions about fluid management in patients with volume overload. Author Edmund A. Liles Jr, MD, of the University of Utah joins JAMA Associate Editor David Simel, MD, MHS, to discuss best evidence from physical exam findings including ultrasound, radiographs, and lab studies for determining volume overload in spontaneously breathing patients.

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Type 1 diabetes affects approximately 2 million people in the US and 8.4 million people worldwide. Author Desmond Schatz, MD, of the University of Florida joins JAMA Deputy Editor Mary M. McDermott, MD, to discuss current evidence regarding diagnosis and treatment of type 1 diabetes.

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Mark Cuban, entrepreneur, investor, and cofounder of the Mark Cuban Cost Plus Drug Company, joins JAMA Editor in Chief Kirsten Bibbins-Domingo, PhD, MD, MAS, to discuss the role of pharmacy benefit managers, insurance formularies, and opaque pricing practices that shape how most Americans access prescription drugs. Hear why he thinks doctors are the good guys in a broken system.

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Opioid use disorder is the third most prevalent substance use disorder worldwide. Author Alexander Walley, MB, MSc, of Boston Medical Center and Boston University joins JAMA Deputy Editor Kristin Walter, MD, MS, to discuss the efficacy, safety, and practical considerations of treating patients with medications for opioid use disorder, opioid withdrawal, and opioid overdose.

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Ovarian cancer may be prevented with removal of the fallopian tubes during pelvic or select abdominal surgery in eligible women. This procedure, opportunistic salpingectomy, can be offered to more eligible women. Author Jurgen M. Piek, MD, PhD, of the Catharina Cancer Institute discusses this and more with JAMA Deputy Editor Linda Brubaker, MD, MS.

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