One underreported fact about obesity: you could have it and still be considered healthy. Christie Aschwanden is host and producer of “Uncertain,” a podcast from Scientific American. She joins host Krys Boyd to discuss what being overweight and metabolically healthy means, why BMI might not be a great tool for understanding health and body size, and what new research is revealing about the how weight and health intersect. Her article is “People Who Are Fat and Healthy May Hold Keys to Understanding Obesity.”