In her youth, Hemingway lived in fear of falling prey to what she calls “… the Hemingway legacy of mental illness, addiction, and eating and drinking to excess.” Eating a no-fat, low-protein, and carbohydrate-rich diet that kept her looking thin for the cameras, Hemingway, by her own admission, also drank caffeine like a fiend and exercised obsessively. “I loved the energy I got from coffee and then I would jump rope for hours in my apartment after working out at the gym,” she recalls. “Because I didn’t drink alcohol or take drugs, I thought I was the healthiest, cleanest-living person in the world, until I got to the point where I had zero energy, my menstrual periods stopped, and tests revealed that in addition to low thyroid function, I was vitamin-deficient.”