The oral composition comprising: (a) from lwt% to 60wt% of a calcium-containing abrasive (b) a calcium-catching phosphate source in an amount sufficient to provide at least lOOmM of phosphate ions, PO4 (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.