Exercise-induced asthma is a condition where the patient suffers from asthma symptoms—breathlessness, cough and wheezing—with exercise. Japanese researchers have found that vitamin C relieves exercise-induced asthma. The study was a small one. It was presented at the World Congress of Asthma; Buenos Aires, Brazil on October 19, 1999, involved children who did not regularly take any asthma medication. The researchers tested the children, then gave them a dose of 2,000 mg. of vitamin C per day for four weeks. During an exercise test given at the end of the four weeks, eight out of 17 reported fewer attacks and better lung function. Other studies have shown that antioxidants in general help this condition.