Browning decreases the commercial value of apple juice, and therefore colour preservation during processing
and storage is the main objective of manufacturers. In this study, the efficacy of phytic acid as
a browning inhibitor for use on apple juice was investigated. Browning of apple juice treated with phytic
acid was monitored during processing and storage. 0.1 mM Phytic acid inhibited the polyphenol oxidase
(PPO) from the apple juice by 99.2%. Consequently, the apple juice treated with phytic acid had significantly
lower browning formation during processing and after 6 months of storage at room temperature
compared with the control (p < 0.05). Results indicate that this is a promising way to inhibit browning in
apple juice.