The increase in wetting time of MMP samples during storage may be attributed partly to increase in free fat content and native quality of proteins.
Considerable increase in wetting time of dried milks attributed this to increased liberation of free fat during storage [19,20].
Loss in wettability in pre-term infant formula, khoa powder and kulfi mix powder after storage at 30 °C has been reported [21].
Besides, similar observations have also been reported in cheddar cheese, whey powder, whey based mushroom soup powder and whey kinnow juice powder, respectively [22,23].