Original sentence: The vast majority is olive oil which has been artificially flavoured using a synthetic agent such as 2,4-dithiapentane.Truffle oil is often used as a lower cost and convenient substitute for truffles, to provide flavouring or to enhance the flavour and aroma of truffles in cooking
Edited sentence: The vast majority is olive oil which has been artificially flavored using a synthetic agent such as 2,4-dithiapentane.Truffle oil is often used as a lower cost and convenient substitute for truffles, to provide flavoring or to enhance the flavor and aroma of truffles in cooking