The effectiveness of the use of tea extracts for this process, however, does vary
according to the extent of fermentation that has taken place in the tea prior to the application of tea extracts. Amongst the three tea extracts, green tea and Pouchong
tea were significantly more effective at inhibiting the formation of TBARS in bonito fillets than was black tea. No significant difference in TBARS values were
observed between the fillets glazed with green tea and those glazed with Pouchong tea. According to the results depicted in Table 4, an increasing level of fermentation
of tea reduced its antioxidant activity upon lipids present in bonito flesh. Antioxidative catechins, which are abundant in green tea and Pouchong tea (Lin & Liang, 2003), are responsible for the inhibition of lipid oxidation in bonito fillets during the fillets’ frozen storage.