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

mean RF value min max SD n # of references
 
Phenolic acids - Hydroxybenzoic acids - 2-Hydroxybenzoic acid
Cereals and cereal products
Cereals Common wheat, whole grain flour 2.11 2.11 2.11 0 1 1
Common wheat, whole grain flour with bran 1.73 0.65 2.81 1.08 2 1