Exercise-Induced Asthma, Vitamin C and Beta Carotene

In a double-blind study, EN Schachter and A Schlesinger investigated the role of ascorbic acid in exercise-induced bronchospasm in asthmatics. They found pretreatment with ascorbic acid led to a significant attenuation of the bronchospasm seen five minutes after exercise compared to placebo as measured by FVC (.24 vs .48). and by FEV1 (.24 decrease vs .44 decrease after placebo).55

This study was supported by evidence presented by M Miric and MA Haxhiu, in 1991. The effect of vitamin C on exercise-induced airway constriction was studied. Pretreatment with ascorbic acid prevented the significant alteration in airway geometry induced by exercise in asthmatic patients. These results suggest that vitamin C deficiency might augment airway responses to exercise and other bronchospasmogenic factors, and treatment with vitamin C may decrease airway hyperresponsiveness.56

I Neuman, et al. showed that a daily dose of beta carotene exerted a protective effect against exercise-induced asthma in 53% of patients after only one week.57

 
 

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