The effects of on viral respiratory infections in humans: A rapid review.

Brief Overview: Based on the evidence identified in this rapid review, preparations and herbal complex preparations including may be a therapeutic option for treating early symptoms of respiratory tract infections. The best effectiveness for preparations has been proven for coughing, as an expectorant and to reduce the frequency and intensity of cough. Only weak evidence was found for all other researched symptoms.

The effect of spp. on the prevention or treatment of COVID-19 and other respiratory tract infections in humans: A rapid review.

Brief Overview: Current evidence suggests that supplementation may decrease the duration and severity of acute respiratory tract infections; however, no studies using in the prevention or treatment of conditions similar to COVID-19 have been identified. Few adverse events were reported, suggesting that this herbal therapy is reasonably safe. Because can increase immune function, there is a concern that it could worsen over-activation of the immune system in cytokine storm; however, clinical trials show that decreases levels of immune molecules involved in cytokine storm.