Kurt Gödel, photographed as a student in Vienna in the 1920s
1978: Breakfast, for the mathematician Kurt Gödel, generally consisted of a single egg, one spoonful of tea, or possibly two, and sometimes a little milk or orange juice. For lunch, he usually ate string beans, but never any meat. In the last months of his life, Gödel’s obsessive fear of poisoning meant that he existed on navel oranges, white bread and soup – though he stopped buying soup when the grocery store put up the price by two cents. At the time of his death, from “malnutrition and inanition” resulting from a “personality disturbance”, Gödel’s weight had dropped to 30 kilograms.
Source: John W. Dawson, Jr., Logical Dilemmas: The Life and Work of Kurt Gödel (1997), pp. 248–53