A single 8 oz. burger patty contains more than the RDA for zinc.
As far as quercetin goes, it's great but it's only one of many substances that acts as a zinc ionophore.
Apples, tomatoes, and broccoli are also good sources of quercetin along with other flavonoids that help bind zinc to cells for absorption as needed. Important thing here is eating the skin, so eat the apple instead of drinking juice.
Berries contain multiple flavonoids as well. I mentioned blueberries because they're antioxidant powerhouse. I buy them frozen and eat a handful here and there.
Zinc-Binding Sites on Selected Flavonoids
https://link.springer.com/article/10.1007/s12011-014-0099-0
So, yes, if you eat whole fruits and vegetables and make sure your plate is colorful, you probably get enough quercetin. Can always take a supplement as well.
I eat plenty of red onions and I haven't gotten sick my entire adult life for the most part.
When I do feel a respiratory infection coming on (sore throat, stuffy nose, etc,), I always use a home remedy I learned as a kid. I bring some salt water to a boil, wait for it to cool a bit and then stick a towel over my head and breathe in the vapors for 10-20 minutes. The other thing I do is take a spoonful of honey with a clove of raw garlic chopped very fine and sprinkled with some crushed red pepper. Seems to stop anything in its tracks, especially after a good night's sleep.
A single 8 oz. burger patty contains more than the RDA for zinc.
As far as quercetin goes, it's great but it's only one of many substances that acts as a zinc ionophore.
Apples, tomatoes, and broccoli are also good sources of quercetin along with other flavonoids that help bind zinc to cells for absorption as needed. Important thing here is eating the skin, so eat the apple instead of drinking juice.
Berries contain multiple flavonoids as well. I mentioned blueberries because they're antioxidant powerhouse. I buy them frozen and eat a handful here and there.
Zinc-Binding Sites on Selected Flavonoids
https://link.springer.com/article/10.1007/s12011-014-0099-0
So, yes, if you eat whole fruits and vegetables and make sure your plate is colorful, you probably get enough quercetin. Can always take a supplement as well.