Magnitude 1kgMagnitude 1kg Magnitude 1kg Magnesium is an essential mineral, playing important roles in many areas of metabolism. One of its major roles is as a co factor in the enzymes involved in nerve and neuro muscular transmission helping to regulate nerve to nerve and nerve to muscle transmission and communication. A lack of magnesium can result in nerve and neuro muscular excitability, resulting in a tense, nervous horse. Stressful situations such as