Smoliga, Weiss and Rundell reviewed exercise-induced bronchoconstriction (EIB) and implied in their title that they covered evidence-based managements of EIB. EBM requires that the literature searches should be thorough, and RCTs and systematic reviews should be the primary focus of the searches. There are 3 RCTs on vitamin C and EIB and the pooled relative effect estimate indicates a 48% reduction (95% CI 33% to 64%) in the postexercise FEV1 decline when vitamin C was administered before exercise. These findings were not mentioned by Smoliga et al.
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