The objective of this study was to determine how protein adsorption is affected by insoluble calcium salts
when the salts are dispersed in sodium caseinate solution and its effect on suspension stability. Calcium
carbonate (CaCO3), hydroxyapatite (HA) and tricalcium phosphate (TCP) showed different adsorption
capacities. The saturation of protein with CaCO3 was the lowest of the three. The adsorption preference of
a-casein (a-CN) and b-casein (b-CN) protein fractions was different depending on the calcium salt. For
CaCO3, a-CN was preferentially adsorbed over b-CN, while b-CN was preferred for HA and a similar
decrease trend of a-CN and b-CN for TCP. The protein affected the stability of the calcium suspension
depending on the protein concentration. The critical concentration of protein that needed to stabilize
suspension varied among calcium salts.