DISCLOSED HEREIN IS A CONTINUOUS PROCESS FOR PREPARING A SILICA PRODUCT, COMPRISING: (A) CONTINUOUSLY FEEDING AN ACIDULATING AGENT AND AN ALKALI METAL SILICATE INTO A LOOP REACTION ZONE COMPRISING A STREAM OF LIQUID MEDIUM; WHEREIN AT LEAST A PORTION OF THE ACIDULATING AGENT AND THE ALKALI METAL SILICATE REACT TO FORM A SILICA PRODUCT IN THE LIQUID MEDIUM OF THE LOOP REACTION ZONE; (B) CONTINUOUSLY RECIRCULATING THE LIQUID MEDIUM THROUGH THE LOOP REACTION ZONE; AND (C) CONTINUOUSLY DISCHARGING FROM THE LOOP REACTION ZONE A PORTION OF THE LIQUID MEDIUM COMPRISING THE SILICA PRODUCT. SILICA PRODUCTS AND DENTIFRICE COMPOSITIONS COMPRISING THE SILICA PRODUCTS ARE ALSO DISCLOSED. A CONTINUOUS LOOP REACTOR IS ALSO DISCLOSED. (FIGURE 1)