What Is Quercetin?
UpdatedTrying to understand what is Quercetin and what does it do?
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Quercetin is a naturally occurring compound which can be used in dietary supplements. "It is found in many fruits, vegetables, leaves, seeds, and grains; red onions and kale are common foods containing appreciable amounts of quercetin."
I have heard that taking it in conjunction with zinc can be a preventative measure against covid (and possibly flu) - this was promoted by a Dr by the name of Zev Zelenko. But I think the "mainstream" view is that evidence is lacking with regards to its effectiveness at treating viruses and other diseases.
If you'd like more details on this compound I found the wikipedia page on it to be pretty decent:
https://en.wikipedia.org/wiki/Quercetin