The oral composition comprising: (a) from 1wt% to 60wt% of a calcium-containing abrasive; (b) a calcium-catching phosphate source in an amount sufficient to provide at least 100mM of phosphate ions, PO4 3-; (c) no more than 20wt% of a humectant; and (d) at least 5wt% of water; wherein the oral composition has a pH from 8 to 11.