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Magnesium

Support calm behaviour and muscle function

100 reviews. 4.9 / 5
  • Reviews
  • Technical
  • FAQ's
Guest - 16/01/2026 18:40
I have a very stroppy mare who without her Magnesium supplement would be unbearable . On this supplemental she is calm , works well and is a joy as she is very loving.
Guest - 16/01/2026 18:12
Great for my youngster keeps her level headed , service and delivery also fabulous ❤️
Guest - 08/01/2026 20:16
Early days but 👌 it keeps her more calm
Guest - 05/01/2026 20:00
I feed magnesium to a few of my horses. The ones who are more anxious and stress easily. I find it helps keep them on an even keel. Also, I would give it to any new horse, to help it settle in. You only need to feed a very small amount,
Guest - 04/01/2026 21:42
Great product been using it for sometime due my horses being stressy due to their surroundings and also now living on a track.
COLLEEN - 29/12/2025 14:30
I have been using this for my new boy a Section C Welshie who was very nervous and on edge. I think it has made a real difference.
Guest - 26/12/2025 08:00
Early days in terms of whether the product had had a positive affect. Arrived promptly and well packaged. Would purchase from feedmark again!
Patrina - 14/12/2025 22:41
Excellent product, great service
Lindsey - 17/10/2025 09:14
This was recommended to me by an equine nutritionally to help disperse my cobs cresty neck. Seems to help.
Stephanie - 29/09/2025 19:11
Just started using this for one of my thoroughbreds just to help with focus on her reschooling journey. Seems to be working great.

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Feeding Guide

 
Weight of Horse/Pony Amount per day                               
Up to 400kg ½ scoop
Over 400kg 1 scoop
 
1 level (5ml) scoop of Magnesium weighs approximately 7g. A measuring scoop is provided with this product. 

Feed supplements should be fed according to body weight. Introduce to the horse's diet gradually, splitting between feeds (when applicable).

Magnesium is a complementary feeding stuff for equine animals. Feedmark uses nothing in the formulation of this product that contravenes competition rules.

Nutrition Information

Magnesium plays an important part in nerve and muscle function and can be helpful in calming horses and ponies.  Used daily, Magnesium can help to reduce difficult behaviour and produce a more relaxed approach to work.  Magnesium can also assist in attaining normal fat coverage in overweight equines, especially those with a cresty neck/fatty pockets.  

Composition

Magnesium oxide (100%)

Analytical

Crude protein 0.3%, Crude oils & fats <0.1%, Crude fibre 0.5%, Crude ash 100.0%, Acid insoluble ash 5.9%, Sodium 0.01%

What source of Magnesium is this?

This product contains Magnesium Oxide. 

 

How much Magnesium does this product contain? 

Magnesium Oxide contains approimately 56% Magnesium.