I agree,Onions and apples and blueberries have them, just include these things in your food unless you’re feeling sick. You can add Quercetin supplements if you want to bring the total quercetin amount up. It just healthy eating, no prescription required. Unless you are sick do you even need a full dose? Maybe hold onto the Duvet 1.87% for when you don’t feel well I suppose.
https://www.vitacost.com/vitacost-quercetin-bromelain-120-capsules
Note that the first article mention Viking Aronia as being high in quercetin and antioxidants. Not a great taste, but its healthy. Its a berry bush that you can grow without much work, mostly keep the grass and other plants from surrounding it and give it sun. Not tasty so people will not be filching it, birds avoid it unless they are migrating and need to eat. It stores and freezes well. I think Diana in Wisconsin has some bushes.
https://www.medicalnewstoday.com/articles/320610#nutritional-information
(I don’t make any money from either of these sites.)
“I think Diana in Wisconsin has some bushes.”
Not yet, but they’re on the ‘To-add’ list for my Edible/Medicinal/Crafting/Low Maintenance Landscape.
Aronia is also known as Chokeberry.
Just some examples; not promoting this particular nursery:
https://www.naturehills.com/bushes-and-shrubs/bushes-and-shrubs-varieties/chokeberry-bushes
Also:
There are three species that we know of so far, all native to North America:
Black chokeberry (Aronia melanocarpa) is a small to medium-sized shrub with dark purple-black fruit.
Red chokeberry (Aronia arbutifolia) is a large shrub with red fruit.
Purple chokeberry (Aronia prunifolia) is a natural hybrid of red and black chokeberry.
Although all of the berries score high in antioxidant value, black chokeberry scores the highest.
https://www.tenthacrefarm.com/grow-aronia-berries/
And we can’t omit Ellendra from this conversation. She’s The Elderberry Queen, which is also a very healthy shrub to grow or harvest from in the wild. :)