To the editor: I read with interest the paper “Heat Intolerance in Former Heatstroke Patients'” in the June issue (1).
In 1951, a salesman with an Indiana-Illinois district sustained “heat stroke.” Thereafter if the temperature rose to more than 29.5 °C he got “sick,” very weak, and shocklike. He thus missed most of his summer saleswork, since air conditioned cars were not common then. On a hunch, from an old army tale from World War II, I had him take 100 mg of vitamin C (ascorbic acid) three times daily during the summer months. Even though temperatures stayed at 32