Evaporative concentration of skimmed milk: Effect on casein micelle hydration, composition, and size

► Evaporation of skim milk removes water from the serum in preference to the micelles. ► Soluble calcium and casein are shifted from the serum to the micellar phase. ► Casein micelles are immediately but incompletely rehydrated upon redilution. ► Upon rehydration calcium returns to the serum much more rapidly than the casein. ► Some large casein particles are formed during evaporation.