So I'm moseying around on the Internet and a link takes me to the King Arthur site. Okay, while I'm here, I'll see if they have anything new or interesting. And I come across Bread Salt.
The blurb calls it "An all-natural salt that's ideal for bread baking." It also says "[Its] high mineral content helps feed yeast in a rising loaf. "
(1) What makes this salt so special?