The review discussed here presents natural flavonoids as a promising alternative based on findings that were collected from previously published studies. Moreover, the researchers focused on data from in vitro studies on the effects of flavonoids on the SARS-CoV-2 targets like 3CLpro, papain-like protease (PLpro), the S protein–ACE2 interaction, helicase, and the nucleocapsid (N) protein.
Taken together, the reviewers reported quercetin and myricetin derivatives like baicalein, baicalin, and tannic acid as the most promising flavonoids against the SARS-CoV-2 targets.
Read about the review here:
And here is a List of foods high in natural flavinoids