what is silica in toothpaste
being a Geologist myself, i'm continually Surprised by the unceasing use of Silica in Toothpastes ! Silica, also hydrated silica is 'Silicon dioxide', Quartz, is basically a hard-rock mineral with hardness of 7 on Mohs scale, and tooth enamel is apatite with hardness of 5, so silica will aggressively abrade the softer teeth,