"Some herbal extracts showed a promising in vitro effectiveness against SARS-CoV-2, suggesting an antiviral potential of herbal medicinal products. The potential of herbal medicines to restrict SARS-CoV-2 and to treat COVID-19 should be investigated further in a clinical setting."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7937545/
"The different herbal products (extracts) and purified molecules may exert their anti-SARS-CoV-2 actions by direct inhibition of the virus replication or entry. Interestingly, some products may block the ACE-2 receptor or the serine protease TMPRRS2 required by SARS-CoV-2 to infect human cells. In addition, natural products were shown to inhibit the SARS-CoV-2 life-cycle related proteins such as papain-like or chymotrypsin-like proteases."
https://pubmed.ncbi.nlm.nih.gov/32848790/
"Natural substances such as herbs and mushrooms have previously demonstrated both great antiviral and anti-inflammatory activity. Thus, the possibilities of natural substances as effective treatments against COVID-19 may seem promising. One of the potential candidates against the SARS-CoV-2 virus may be Inonotus obliquus (IO), also known as chaga mushroom."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7551890/
"The engineered spike proteins from SARS-CoV-2 can be STOPPED by a common “weed” that is exterminated from lawns every year. A German university study found that the common dandelion (Taraxacum officinale) can block spike proteins from binding to the ACE2 cell surface receptors in human lung and kidney cells. The water-based dandelion extract, taken from the plant’s dried leaves, was effective against spike protein D614 and a host of mutant strains, including D614G, N501Y, K417N and E484K."
https://thetattyjournal.org/2021/07/18/research-dandelion-leaf-extract-blocks-spike-proteins-from-binding-to-the-ace2-cell-surface-receptor/
Perilla (Perilla frutescens) leaf extract inhibits SARS-CoV-2 via direct virus inactivation
https://pubmed.ncbi.nlm.nih.gov/34119448/
Herb discovered to have activity against the SARS-CoV-2 virus
https://www.naturalproductsinsider.com/herbs-botanicals/herb-discovered-have-activity-against-sars-cov-2-virus