Before they started foisting it off on us in toothpaste, sodium fluoride was a byproduct of metallurgy processes in the US, they had no real plan as to what to do with it.
We’d be better off with calcium fluoride in the toothpaste than sodium fluoride, if they really cared about tooth health and overall health.
“Before they started foisting it off on us in toothpaste, sodium fluoride was a byproduct of metallurgy processes in the US, they had no real plan as to what to do with it.”
I seem to recall when the issue of “fluoridating our water” here in California was on the forefront, the then current use for sodium fluoride was for rat poison.