Progressive Earth's latest Brand New Product now available: PRO ESSENTIAL   

Pro Essential contains three of the essential amino acids Lysine, Methionine & Threonine. Plus four essential minerals: Copper, Zinc & magnesium chelate of glycine hydrate & organic selenium yeast in a high quality, highly absorbed form.

CORONA VIRUS update: We are very short staffed but are doing our very best to process orders as normal. The Postal Service is also extremely stretched at this time, which has had a significant impact on their ability to maintain the usual service levels; therefore, there may be disruption to some deliveries. Please be patient and allow extra time for your order to be delivered before contacting us, the estimated delivery is a guide only and not a guarantee.                                           Many thanks for your understanding.

MAGNESIUM OXIDE 99.7% to 99.8%. Ultra low iron content. Mineral for forage balancing, strong hooves and laminae connection, Equine calmer, metabolic health.



Magnesium Oxide, actual purity 99.7% to 99.8% MgO.

Please note the actual percentage of Magnesium Oxide MgO varies between 99.7% and 99.8% depending on the batch number of the product in stock. The actual percentage will be written clearly on the bag.

Magnesium Oxide 99.7% to 99.8% is a high purity ultra low iron 27ppm (0.0027%) human pharmaceutical grade magnesium. It is virtually tasteless, making it well accepted in food. It is of a very fine particle size for optimum absorption.

  • Magnesium oxide is the primary ingredient in many of the quality equine calming products on the market.
  • Magnesium is needed for more than 325 enzymes within the horses body.
  • Involved in protein synthesis so needed for general growth and repair of tissue, e.g. Hooves.
    Required for the maintenance of normal blood circulation within the body, limbs and feet of the horse
  • Magnesium is critical for balanced secretion of insulin and glucose uptake.
  • It is involved in supporting correct blood sugar levels after carbohydrate intake and inadequate levels are
    associated with incorrect insulin function  (symptoms include cresty neck and/or fat deposits).
  • Magnesium is essential for proper calcium absorption and is an important mineral in the bone matrix.
    It can also assist in the absorption and metabolism of Vitamins B, C and E.
  • Low levels of Magnesium can result in nervousness and an inability to concentrate, tight tense muscles
    which are less able to relax, tightness or tenderness through the back, slow to warm up.
  • Periods of stress lead to an increased need for magnesium.
  • Magnesium is often lacking in equine diets due to processed, preserved, high concentrated feeds.
  • Magnesium is important for the detoxification of toxic substances from the body. It supports
    against heavy metal toxicity.
  • The availability of magnesium is low in; fast growing lush grass; after periods of rainfall; in
    acid soils i.e. ‘horse sick pastures’ or artificially fertilised pastures (acid conditions destroy soil
    microorganisms which are used to make the minerals usable by plants).
  • Useful when magnesium needs boosting in the diet of horse and ponies prone to laminitis.

Feeding guidelines (Requirement may vary):

2g of Magnesium Oxide 99.7% to 99.8% per 100kg of bodyweight,  (10g of magnesium oxide daily for an average 500kg horse)

1 X 15ml measuring scoop = 10g Magnesium Oxide 99.7% to 99.8% (providing approximately 6g elemental magnesium)
1 X 25ml measuring scoop = 15g Magnesium Oxide 99.7% to 99.8% (providing approximately 9g elemental magnesium)

Pack size and availability: Progressive Earth Magnesium Oxide 99.7% to 99.8% equine feed supplement is available in resealable grip seal pouches containing either 1 Kg, 2 Kg or 4 Kg of product.
Multiple purchase options are available.

1 review for MAGNESIUM OXIDE 99.7% to 99.8%. Ultra low iron content. Mineral for forage balancing, strong hooves and laminae connection, Equine calmer, metabolic health.

  1. Rated 5 out of 5

    Susanne Britton Hickson

    My barefoot, spooky Warmblood does very well on this, in addition to his Pro mineral mix. At 650kg I only add about half the recommended daily dose to boost the mineral mix. He’s sane and sensible on that and his feet are extremely strong. Well worth the money.

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