Table 1.

Quercetin content in selected vegetables and fruits (mg/100 g).

Onion	11–33
Lettuce (red)	10–30
Pepper	10–30
Broccoli	3–5
Tomato	2–4
Asparagus	7–20
Peas	14
Apple	2–5
Cherry	1–3
Blueberry	5

Adapted from [1, 4, 6].