Then we look at how it's flame retardant and this is amazing, they use hydrated silica which is a form of sand. (safbaby.com)
They also add in hydrated silica as a mild exfoliant to help rid your skin of dead cells, dirt, and debris that could otherwise clog your pores. (geekwrapped.com)
I would rather avoid it anyway, if possible, but when I looked up natural fluoride - free toothpastes on amazon, they had other questionable ingredients like hydrated silica, which is supposed to damage your enamel, not improve it. (mamanatural.com)