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

mean RF value min max SD n # of references
 
Flavonoids - Flavonols - Quercetin 4'-O-glucoside
Vegetables
Onion-family vegetables Onion [Unknown color], raw 0.54 0.4 0.69 0.12 3 2
Onion [Yellow], raw 0.54 0.54 0.54 0 1 1