“…During storage under conditions of increased humidity, the crystallisation of amorphous sugars may occur, which increases the percentage of free fat. During crystallisation, sugar crystals with sharp edges are formed, damaging the fat coatings and causing compressive stresses, which allow the fat to squeeze out to the surface [7,48]. Lactose, as one of the natural components of milk, is probably the sugar that is the most often used to produce the matrix in the spray-drying of milk powders [24,30].…”