Summary
This study is an overview of three trials investigating the effect of vitamin C supplementation on cold-induced asthma attacks. In total, 79 people participated. All three studies found beneficial effects of vitamin C supplementation against asthma attacks and other asthma symptoms. According to these studies, the administration of vitamin C alleviates common cold symptoms in asthma patients. More details can be found in the study.
References
Hemilä, H.