- Glycyrrhizin, the active chemical in liquorice, could potentially be alternative drug for the treatment of COVID-19 infection and the associated respiratory syndrome. https://www.ncbi.nlm.nih.gov/pmc/articles/pmc7311916/?fbclid=iwar0uoyr5fo2otwafjei5l70pslyl0lv-zlt266dgh1r7nbyhob8kgvlebrm 22 comments science