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

mean RF value min max SD n # of references
 
Phenolic acids - Hydroxycinnamic acids - 5-8'-Dehydrodiferulic acid
Cereals and cereal products
Cereals Rye, whole grain flour 1.24 1.24 1.24 0 1 1
Common wheat, whole grain flour 1.79 1.79 1.79 0 1 1