Agordia - One Health Place

Quercetin - For flavor, for Breath

2 min read
It’s a compound found most commonly in plants - the fruits and vegetables we should be eating  regularly. It’s quercetin and it’s a flavone. 
Quercetin is in relatively low amounts in most plant foods. But a few foods are particularly rich sources. 
Red onions, shallots, apples, and some common teas can be richer sources of quercetin. 
For apples, the skin matters...as it’s the location where the most quercetin is located...Not the flesh.
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Black tea and oolong tea are fermented and rich in quercetin. And in red onions, it’s the outer layers that tend to be richer sources. 
In animal studies, quercetin tends to accumulate in the lung as well as the liver and kidneys. So it’s possible that these tissues would show the most benefit.
And this appears to be the case, because studies in humans who are otherwise healthy and consumed quercetin are less likely to have upper respiratory tract infections.
And if they did have an upper respiratory tract infection, their symptoms were not as  severe and they spent less days being sick.
Diesel exhaust particles are a major contributor to environmental air pollution. For people this can result in allergies, DNA damage, lung cancer and asthma like conditions ...as well as overall impaired immunity.
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But for those living in  polluted areas, there is hope. Quercetin reduces the damage our bodies incur from these pollutants.And there’s mounting evidence that shows that the plants exposed to these pollutants actually increase the amount of Quercetin they produce. Talk about mutual benefit.
So it’s true (sort of) an apple a day can keep the doctor away, or red onion or a cup of tea.