EZium is a daily equine supplement that provides a unique source of magnesium, chelated for maximum absorption. Magnesium deficiencies can be brought on by stress, adrenaline, and physical exertion. Feeding EZium daily prevents the symptoms of magnesium deficiency that can lead to poor performance such as hyperexcitability, erratic behavior, muscle cramps, and metabolic disorders. Positive results in deficient horses can generally be seen within one to two weeks. +-Note from the manufacturer: Due to recent shortages in plastic packaging the lids provided on the current 2-month pails are very difficult to open. Once the pull/tear tab is removed you need to use a hammer, a strong set of pliers, or claws to grasp the 4 tabs holding the lid in order to loosen/remove the lid from the pail.