Retention factor (RF) = (Content After Processing / Content Before Processing) * Yield factor

mean RF value min max SD n # of references
 
Flavonoids - Flavonols - Quercetin
Vegetables
Fruit vegetables Tomato, whole, raw 0.32 0.32 0.32 0 1 1
Leaf vegetables Spinach, raw 0.48 0.32 0.65 0.17 2 1
Onion-family vegetables Onion [Unknown color], raw 0.54 0.54 0.54 0 1 1
Onion [White], raw 0.33 0.33 0.33 0 1 1