During the age of the dinosaurs a vast inland sea existed in central Utah. As the Sundance Sea receded, it left behind a rich deposit of minerals perfectly balanced by nature. This treasure, the origin of Redmond salt, was preserved in its crystallized state by a blanket of volcanic ash. It comes to your horse in the same unpolluted and unrefined state it exists underground.
Minerals are balanced and proportioned by nature--meaning, nature determines the minerals present and their quantities..