[chuck allen]

Fruits and vegetables are the primary dietary sources of quercetin, particularly citrus fruits, apples, onions, parsley, sage, tea, and red wine. Olive oil, grapes, dark cherries, and dark berries such as blueberries, blackberries, and bilberries are also high in quercetin and other flavonoids.

[chuck allen]

Quercetin, not caffeine, is a major neuroprotective component in coffee

https://www.sciencedirect.com/science/article/abs/pii/S0197458016301154#:~:text=The%20amounts%20of%20the%204,and%2040%20mg%20for%20caffeine.