Research on ingredients listed
Licorice:
https://pubmed.ncbi.nlm.nih.gov/32147070/
https://pubmed.ncbi.nlm.nih.gov/19535697/
https://pubs.acs.org/doi/abs/10.1021/jf404939f
https://www.thieme-connect.com/products/ejournals/html/10.1055/s-0037-1608534
https://www.sciencedirect.com/science/article/abs/pii/S1674638414600423
Elecampane:
https://www.tandfonline.com/doi/abs/10.1080/10412905.1993.9698251
https://www.mdpi.com/1420-3049/27/4/1406
Orange Peel:
https://pesquisa.bvsalud.org/portal/resource/pt/wpr-463697
https://www.sciencedirect.com/science/article/pii/S2665927121000332
Mullein:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2371917/?page=1
https://www.mdpi.com/2079-7737/10/7/618
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2952292/
https://link.springer.com/article/10.1007/BF02975855
https://www.sciencedirect.com/science/article/pii/S0102695X13701261
https://ijhs.shmu.ac.ir/index.php/ijhs/article/view/64
Marshmallow:
https://www.tandfonline.com/doi/abs/10.1080/J157v03n03_08?journalCode=iher20
https://www.cabdirect.org/cabdirect/abstract/20103022026
https://www.sciencedirect.com/science/article/pii/S0196070918308238
https://www.karger.com/Article/Abstract/88934
https://europepmc.org/article/med/15998989
https://pediatria.orscience.ru/2658-6630/article/view/109551
Combination:
https://www.aafp.org/pubs/afp/issues/2003/1101/p1840.html
https://journals.sagepub.com/doi/full/10.1177/1934578X20951431