During the past few decades, the use of natural antioxidantsand plant-derived extracts has received increased interestdue to concerns over possible adverse health effects causedby the use of synthetic antioxidants. Green tea extract, a naturalsource of antioxidant, has been successfully used notonly to enhance flavour but also to extend the shelf-life ofvarious food products. Green tea extract is particularly suitablefor products with high susceptibility to lipid oxidation,including trans-free and low-fat products and foods with ahigh content of polyunsaturated fatty acids. The primaryapplication areas of green tea extract include meat, poultry,seafood, mayonnaise, salad dressings, soups, sauces, margarines,fat spreads, shortening, frying oils, bakery products,pizza toppings, cereals and snack foods, among many others.Research reports on measuring the effectiveness of green teaextract in food against lipid oxidation are scarce in the literature.The typical parameters measured in determining theeffectiveness of green tea extract in food include peroxide values,conjugated dienes, thiobarbituric acid reactive substances(TBARS), Oil Stability Index (OSI), Oxipres inductionperiod, and sensory evaluation, among others.
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