>>15471072For most products, it's just a shakedown racket where an expensive kosher inspector has to approve your facility to get a kosher label on your obviously kosher product. It's a private industry, but manufacturers go along with it hoping to snag those sweet, chosen dollars. Nobody pays attention to the label except Jews and sometimes vegans.
As for "kosher" salt, that's just the generic term in America for coarse cooking salt (for dumb Jewish historic reasons). It's pretty much incomprehensible for any salt to actually be non-kosher (still have to invite the rabbi to your factory if you want the Jew U tho, what if you're adding shellfish to the salt, goy?) The box in your OP looks like bizarre marketing for dumb Jews and goys who want "the kosherest" salt for Passover and sirloin respectively.