Answers are grounded in this paper and cite their sources.
Cochrane Database of Systematic Reviews supplementation was compared with placebo for exercise-induced asthma; this trial included only eight participants. The randomisation process of the trials were unclear leading us to downgrade the quality of the evidence. Four of the studies were double blind while the other study was single blind.
No takes yet. Share an insight, caveat, or question.
Wilkinson et al. (2014) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: