424 This doctor trained at the Mayo Clinic and runs the largest independent testing laboratory in Idaho. Listen to what his lab testing is showing: (twitter.com) posted 2 years ago by Vidura 2 years ago by Vidura +424 / -0 96 comments share 96 comments share save hide report block hide replies
Most Quercetin supplements are sourced from parsley and red onions but there are lots of foods that have it in them - red apples, elderberries, blue berries, kale. You would have to consume a lot of those to get to the dosage required though..LOTS.
Matcha is probably the best quercetin alternative.