Encapsulated amorphous calcium carbonate compositions

An encapsulated amorphous calcium carbonate (ACC) composition, comprising:

• a plurality of solid encapsulated ACC particles each including:
• i. an ACC core including ACC and at least one agent stabilizing the ACC in amorphous form;
• and
• ii. an encapsulation matrix completely coating the ACC core and including two coating layers, wherein each one of the two coating layers at least partly coats the ACC core, wherein the two coating layers includes a first inner coating layer that contacts the ACC core and including a film forming polymer and another coating layer including a lipid, and
• iii. optionally the encapsulation matrix further comprises one or more additional coating layers, each of said one or more additional coating layers including an encapsulating agent selected from the group consisting of a film forming polymer and a lipid,
• wherein the encapsulation matrix is a combination of all coating layers, wherein each one of the film forming polymers includes a polymer selected from the group consisting of cellulose, a cellulose derivative, methyl methacrylate, and any combination thereof and the lipid includes a member selected from the group consisting of an edible wax, a fatty acid, a fatty acid ester, an oil, and any combination thereof, and wherein the encapsulation matrix retains at least 20% of the calcium carbonate in amorphous form and undissolved, after the composition is exposed to an aqueous medium for at least one week.