Doctors have shorter appointments with fat patients and show less emotional rapport in the minutes they do have. Negative words—“noncompliant,” “overindulgent,” “weak willed”—pop up in their medical histories with higher frequency. In one study, researchers presented doctors with case histories of patients suffering from migraines. With everything else being equal, the doctors reported that the patients who were also classified as fat had a worse attitude and were less likely to follow their advice. And that’s when they see fat patients at all: In 2011, the Sun-Sentinel polled OB-GYNs in South Florida and discovered that 14 percent had barred all new patients weighing more than 200 pounds.

Some of these doctors are simply applying the same presumptions as the society around them. An anesthesiologist on the West Coast tells me that as soon as a larger patient goes under, the surgeons start trading “high school insults” about her body over the operating table. Janice O’Keefe, a former nurse in Boston, tells me a doctor once looked at her, paused, then asked, “How could you do this to yourself?” Emily, a counselor in Eastern Washington, went to a gynecological surgeon to have an ovarian cyst removed. The physician pointed out her body fat on the MRI, then said, “Look at that skinny woman in there trying to get out.”