Encapsulated amorphous calcium carbonate compositions

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

• ACC powder comprising:
• i. an ACC core comprising ACC stabilized by at least one agent stabilizing the ACC in amorphous form and silica;
• and
• ii. an encapsulation matrix completely coating the ACC core and comprising at least two coating layers, wherein each one of the two coating layers at least partly coats the ACC core, wherein the first inner coating layer that contacts the ACC core includes ethyl cellulose, and the second coating layer on top of the first inner coating layer includes one or more edible waxes;
• wherein the encapsulation matrix is a combination of all coating layers, at least 40% of the calcium carbonate is retained in amorphous form, and remains undissolved, after the composition is exposed to an aqueous medium for at least one week.