Doesn't that count as minerals in the diet?
OK, sorry. crossed the line.
I get mine from Smart & Final. I think the brand is SPID
It's a heavier bristle, so I think I'd see if any came out, but I haven't had a problem with that. The end will wear out with use, but as TO pointed out, cut that part off and wear out the rest of it. Or just angle it differently during use.