Health

You may think of the high-fat, low-carb eating plan as a faddish way to lose weight. But the keto diet is now being used to tackle conditions from severe depression to bipolar disorder and anorexia, with transformative results

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Brett Ryder

In February, Robert F. Kennedy Jr., the US secretary of health, made a characteristically bold claim. A doctor at Harvard University, he proclaimed, “has cured schizophrenia using keto diets” .

If you happened to be passing Harvard University that day, you might have heard the sound of that doctor’s palm hitting his forehead. “For the record, I have never ever once used the word ‘cure’ in any of my work,” says Christopher Palmer , a psychiatrist at Harvard Medical School.…