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Vitamin C Protects Againt Loss of Lung Function
Cigarette smoking is a major risk factor for chronic obstructive pulmonary disease (COPD). However, many factors may contribute to COPD, as only 15% of smokers develop COPD.
In a general population sample from China, the study examined the association between pulmonary function and dietary vitamin C intake.
The pulmonary function of each subject was assessed and each subject completed a detailed questionnaire. Vitamin C intake and plasma vitamin C levels were determined. Complete data was provided by 3,085 subjects.
Results showed that dietary intake of vitamin C was significantly associated with forced expiratory volume in the first second (FEV1), and forced vital capacity.
An increase of 24.9ml in forced vital capacity and 21.6ml in FEV1 was associated with an increase of 100mg/day vitamin C intake. Findings suggest that dietary vitamin C may reduce susceptibility to loss of lung function.
Dietary vitamin C intake and lung function in rural China
Am J Epidemiol 148 (1998)
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