Heart Association clashes with RFK, Jr., doubles down on recommendation for low-fat diets; Why the evidence for meat and full-fat dairy avoidance is weak; What are the health benefits of circumcision? The ultimate weight loss plan—the Boring Diet; Substituting famotidine for PPIs for reflux; Midlife vitamin D curbs Alzheimer’s risk; Natural support for polymyalgia rheumatica; What teens eat could be affecting their mental health.