Magnesium (Mg) is an essential mineral that horses require for proper nerve and muscle function. Magnesium functions as an electrolyte, plays a role in protein synthesis and is involved in over 300 metabolic processes in the horse’s body. It is especially important for growing and heavily exercised horses. [1]

Horses that are not getting enough magnesium in their diet may be excessively irritable, nervous, or they may chronically tie-up. If your horse experiences thumps (synchronous diaphragmatic flutter) they likely are low in magnesium.

Magnesium deficiency is more likely to occur in the springtime when fast-growing grasses do not accumulate much of this macromineral. Although severe deficiency is rare in horses, suboptimal levels can affect their mood and performance.

Magnesium toxicity is unlikely in horses receiving supplementation because excess amounts are efficiently excreted in the urine. Providing too much, particularly in the form of magnesium sulfate, might cause temporary diarrhea. Magnesium oxide is the recommended form for supplementation.

Magnesium Oxide

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