As magnesium also acts on muscle tension, a horse low in magnesium may appear "tight" in his way of going and express excitability or a lack of confidence. Low magnesium may be caused by a grazing deficiency or simply a horse or pony#s individual metabolism. Magnesium levels can also be reduced by regular travel and competition. Magic is more than just magnesium; it also contains a blend of herbs chosen for their traditional use in supporting confidence and concentration. The unique blend of magnesium and herbal support of Magic enables the horse to tackle all that is asked of it, calmly and confidently. Magic Liquid has the advantage of extracting the active ingredients from the herbs, making them more readily available for absorption by the horse. The calming effects can be seen fast. Note: NAF are pleased to confirm that the magnesium used in Magic Liquid does not contravene FEI rules and is safe for use in all horses.