UHT milk has been shown to have a flavour thatis undesirable to many consumers.
Someresearchers attribute this mainly to the develop-ment of a ‘stale’ or ‘oxidized’ flavour defect thatarises within a month of storage and increases inintensity as time progresses.
Lipid oxidation inthe milk produces methyl ketones and saturatedaldehydes which contribute to this stale flavour.