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

mean RF value min max SD n # of references
 
Flavonoids - Flavonols - Kaempferol
Vegetables
Leaf vegetables Spinach, raw 0.59 0.54 0.65 0.055 2 1
Onion-family vegetables Onion [Unknown color], raw 0.28 0.28 0.28 0 1 1