In a study in germany , this salt was found to contain gypsum and 10 minerals . Redmond salt right here in north america also contains 10 minerals and is mined from ancient seabed . The one thing that concerns me is the fact these are mined and they normally use explosives and there is contamination problems with dynamite. Thats why you should never use road salt for livestock feed or yourself. Road salt would be fine except for that fact as it contains as many minerals as the afore mentioned salts . Redmond,s real salt at least is tested and feed to 100,s of thousands of livestock and it has greatly benefited them.