Elderberry aids COPD symptoms
Kirichenko TV, Sobenin IA, Markina YV, Gerasimova EV, Grechko AV, et al. Clinical Effectiveness of a Combination of Black Elder Berries, Violet Herb, and Calendula Flowers in Chronic Obstructive Pulmonary Disease: The Results of a Double-Blinded Placebo-Controlled Study. Biology (Basel). 2020;9. doi:10.3390/biology9040083