Date published: 2025-9-7
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Horse Magnesium Plus product group 399752
UltraCruz® Equine Magnesium Plus is formulated to support muscle and nerve function in horses. This supplement helps maintain a balanced nervous system and overall equine wellness.
UltraCruz® Equine Magnesium Plus is formulated to support muscle and nerve function in horses. This supplement helps maintain a balanced nervous system and overall equine wellness.

Magnesium Supplement for Horses – UltraCruz®

by Santa Cruz Animal Health
4.9(75)
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Pelleted Magnesium Supplement to help support healthy metabolism, cardiac function and calming
    • Ideal for horses in all stages of life and performance levels
    • Helps support normal muscle and nerve function
    • Helps support cardiac function and promotes normal blood pressure
    • Helps aid in regulation of blood sugar levels and aids in the metabolism of carbohydrates, amino acids and fats
    • May help calm horses, since a symptom of magnesium deficiency is anxiety or nervousness
    • Easy to use pelleted product, which helps reduce waste associated with supplements in powder form
    • Developed and manufactured in the USA with globally-sourced ingredients by Santa Cruz Animal Health
    • Same day shipping on orders received before 3:30 PM Central Time Monday-Friday.
    • DISCOUNT: Bulk orders of UltraCruz® Animal Health products totaling $500 or more receive a 5% discount.
Catalog #DescriptionPriceQtyAutoshipCARTFAVORITES
sc-550687
10 lb, 70 day supply, Pellet
$39.95Autoship: $37.95
sc-550688
20 lb, 140 day supply, Pellet
$74.95Autoship: $71.20
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UltraCruz® Equine Magnesium Plus Supplement for Horses

UltraCruz® Equine Magnesium Plus Supplement for Horses is a palatable, pelleted source of magnesium for horses that may need additional supplementation to their diet. Magnesium (Mg) is an essential mineral that horses require for a multitude of different reasons. It serves as an electrolyte in blood, plays a role in protein synthesis, and is found in hundreds of enzyme reactions. It is also needed for optimal muscle contractions and nerve functions. Horses with low levels of magnesium in their diet may experience muscle pain, work intolerance or fatigue, anxiety/nervousness, hypersensitive skin, irregular heartbeat or tying up. With its effect on so many things, Magnesium is especially important for growing or heavily exercised horses.

Magnesium Supplement for Horses - Jake Gorrell Riding CD Sparkle at the IRCHA Open Derby Reserve

Magnesium works closely with calcium to maintain proper muscle function and help enable muscle relaxation. This in turn can support recovery and help ease muscle pain and cramping experienced by horses in heavy training. Promoting the absorption of calcium from the diet, magnesium also helps support healthy bones and growth.

Since a symptom of magnesium deficiency is anxiety or nervousness, horses may also experience a calming effect from being supplemented magnesium.

UltraCruz® Equine Magnesium Plus Supplement for Horses contains both Magnesium Citrate and Magnesium Oxide, inorganic forms of magnesium that have been shown to have absorption rates around 70%.

References:

  1. Magnesium disorders in horses.  |  Stewart, AJ. 2011. Vet Clin North Am Equine Pract. 27: 149-63. PMID: 21392659
  2. Pharmacokinetics of magnesium and its effects on clinical variables following experimentally induced hypermagnesemia.  |  Schumacher, SA., et al. 2020. J Vet Pharmacol Ther. 43: 577-590. PMID: 32525571
  3. Effects of intravenous magnesium sulfate on serum calcium-regulating hormones and plasma and urinary electrolytes in healthy horses.  |  Schumacher, SA., et al. 2021. PLoS One. 16: e0247542. PMID: 34181644
  4. Pathologic features of magnesium deficiency in young horses fed purified rations [1974]  |  Harrington, D. 1974. American journal of veterinary research.
  5. Equine magnesium supplements: Evaluation of magnesium oxide, magnesium sulphate and magnesium carbonate in foals fed purified diets  |  D. D. HARRINGTON, J.J. WALSH. 1980. Equine Verierinary Journal BEVA. Vol 12, Issue 1: 32-33.
  6. Nanoparticles in Equine Nutrition: Mechanism of Action and Application as Feed Additives  |  Moyosore J. Adegbeye, Mona M.M.Y.Elghandour, Alberto Barbabosa-Pliego, José Cedillo Monroy, Miguel Mellado, Poonooru Ravi Kanth Reddy, Abdelfattah Z.M.Salem. 2019. Journal of Equine Veterinary Science. Vol 78: 29-37.
  7. Intravenous Magnesium Sulphate in Standing Horses: Effects on Physiological Parameters, Plasma Concentration of Magnesium and Nociceptive Threshold Tests  |  Lavinia La Rosa, Lara Twele, Luc Duchateau, Frank Gasthuys, Sabine BR Kästner, Stijn Schauvliege. 2022. Journal of Equine Veterinary Science. Vol 118.

Pellet vs. Powder Supplement Formulations

UltraCruz® Supplements are now available in pelletized formulations. By using pellets, rather than powder, we have been able to:

Magnesium Supplement for Horses - Piles of UltraCruz Supplement pellets
  • Ensure stability of active ingredients
  • Maximize product freshness
  • Reduce waste

All San Juan Ranch performance and breeding horses use UltraCruz® Equine pelletized products.

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Is it chelated?

Asked by: Alli
The magnesium that we use in our products is not chelated. Thank you, SCAH Team
Answered by: Mandy
Date published: 2023-09-19

What if you are only able to give supplements once a day? should you give 2 scoops?

Asked by: Ellen
Hello, for optimal results re recommend feeding this supplement twice daily. Thank you, SCAHealth
Answered by: SCAH Representative
Date published: 2022-11-03

How much magnesium oxide is there? How much magnesium citrate?

Asked by: resilientequine
Hi, The exact amount of these ingredients is proprietary information. There are 5000mg of magnesium/daily serving, or 2500mg of magnesium/scoop.
Answered by: SCAH Representative
Date published: 2024-08-06

How many servings per pound?

Asked by: Moose
Hi, It is recommended you administer 1 scoop (32 g) twice daily. Servings based on an average horse weight of 1,000 lbs. For more detailed directions, please look under the instructions tab on this products page.
Answered by: SCAH Representative
Date published: 2022-11-03

How many mg

Asked by: Jorli
Hello, There is 5,000 mg of magnesium in this supplement. Thank you, SCAHealth
Answered by: SCAH Representative
Date published: 2022-11-03

What kind of magnesium is in this product?

Asked by: Janine9499
Hello, The kind of magnesium in this product are Magnesium Oxide and Magnesium Citrate Thank you, SCAhealth
Answered by: SCAH Representative
Date published: 2024-09-19
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Rated 5 out of 5 by from Miracle ProductI recently bought a 6 year old, professionally trained reined. She was great in the arena until anything, and I mean anything, was different outside of the arena; people walking by, a truck driving by on a nearby road, a neighbor working in their yard. She would fixate on whatever was different and be almost unresponsive. She would bolt if a bird or rabbit jumped up near her and pace in her pen for most of the day. She was so bad that she wore through a set of new shoes in four weeks to the point where they broke off of her feet--not the clenches, the actual shoes broke in pieces. A friend suggested the Ultra Cruz magnesium supplement. After feeding the Ultra Cruz for two weeks, my mare has almost stopped pacing, she no longer spooks, she is attentive and doesn't fixate on outside stimuli, and has a softness in her eye. She is now a joy to ride.
Date published: 2022-06-17
Rated 5 out of 5 by from Horses eat it.I bought this along with the B1 vitamin because my horse was explosive and I tried a similar calming supplement with these ingredients and it calmed him. I bought this magnesium product because I can give more or less depending on my horse's craziness. This product is also by far cheaper in price to the one I tried. I gave it to another horse and he ate it too. Definitely will purchase again
Date published: 2022-03-19
Rated 5 out of 5 by from Works well for my ponies!I have been giving this to my pony stallion who came to me, much to my surprise, as borderline insulin resistant. That was nearly 11 years ago. Combined with exercise, he has been very healthy and not needed the drugs that the former owner had given him.
Date published: 2022-05-18
Rated 5 out of 5 by from Horse Show Spookmy mare was working great at the area where she is stabled but when we would go the a horse show she would pin her ears at other horses as they came by and would spook at the slightest thing around the arena and she us to not be like that. I have had her on UltraCruz Magnesium Supplement for 2 months and have seen a big change in her behavior. She is less responsive to new things in her environment and more focused on me and not the other horses coming around her.. I also took advantage of a couple of discount samples of the Natural Fly spray (smells amazing) and the Detangler Gel and both products worked great and i will be ordering all again.. I highly recommend these products.
Date published: 2024-06-24
Rated 5 out of 5 by from magnesium pellets a successMy very picky mare eats this like a champ which is almost unbelievable. Shes a headshaker so trying to get it is important to get enough magnesium in her diet. The fact that it is pelleted rather then powder helps because she will not eat wet mushy feed.
Date published: 2023-03-23
Rated 5 out of 5 by from MagnesiumLove this form of magnesium, the horses love to eat it and its very helpful with their metabolic issues!
Date published: 2022-12-11
Rated 5 out of 5 by from Working well for picky mareI recently purchased the Magnesium from Santa Cruz and am so glad I did. I had previously tried a different brand and my mare would not finish her grain, and as soon as I ran out she started eating everything again. With the UltraCruz she is eating everything. The bag is huge and a great value as well.
Date published: 2022-05-25
Rated 5 out of 5 by from Happy with the productMy horse has been on this product for about 3 weeks and I am happy with the results! He seems to eat it just fine, which is a great bonus. I was switching him off of a different magnesium product and I’m happy to see that he seems on par with or maybe even more relaxed mentally.
Date published: 2022-09-13
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Magnesium Supplement for Horses – UltraCruz is rated 4.9 out of 5 by 79.
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