This review examines the parameters of enzymatic browning in apple and
apple products that is, phenolic compounds, polyphenoloxidases, and o
ther factors (ascorbic acid and peroxidases), both qualitatively and q
uantitatively. Then the relationships between intensity of browning an
d the browning parameters are discussed, including a paragraph on the
methods used for browning evaluation. Finally, the different methods f
or the control of browning are presented.