trace minerals contents is on the bag. di-calcium phosphate is just that. the rock salt is nacl so thats illegal but you could use apple jello, peach, moultrie makes an acorn scented mineral and a berry scented mineral that cold be mixed with the home brew. the salt is basically just to get the deer to take in the trace mineral and the di-cal which are the things that build bone and help lactating does and start the fawns off with bigger body sizes.