Magnesium supports proper muscle function and a healthy nervous system in horses. This essential mineral is required for bone growth, metabolic function and healthy hooves. Magnesium oxide supplementation has been shown to have a calming effect in nervous horses.
Mad Barn’s magnesium oxide powder is a macromineral supplement that supports equine mood balance, performance, muscle function and metabolic health.
Magnesium plays many roles in the horse’s body. It is involved in the formation of bone and protein synthesis, helps to maintain electrolyte balance, influences nervous system regulation and is a co-factor for a number of enzymes.
This product is commonly used as an equine calming supplement. In one study, researchers in Australia fed 10 grams of added magnesium to horses (21 g total magnesium content in the diet) and observed a sedative-like calming effect that was comparable to a 0.04mg/kg bodyweight dosage of Acepromazine.
According to the NRC, horses at maintenance require 15 mg per kg of bodyweight of magnesium per day. For a 500 kg horse, this is an intake of 7.5 grams per day. Performance horses or lactating mares require more per day.
Low magnesium levels or deficiency can contribute to nervousness, depression, abnormal behaviour, muscle tremors, lack of coordination, respiratory problems, growth failure and more.
Magnesium is an important part of insulin’s ability to act on cells. Links between magnesium deficiency and insulin resistance have been shown in humans and rodents but remain to be confirmed in horses. Magnesium supplementation may lessen abnormal fat deposits such as cresty neck which could lead to improvements in metabolic health.
Magnesium and calcium work together to enable muscle function. Calcium is involved in muscle contraction in horses whereas magnesium is important for muscle relaxation. Subclinical deficiency of this mineral in horses can affect muscle relaxation causing muscle spasms.
Thumps in endurance horses which are spasms of the diaphragm can be addressed with magnesium and calcium to improve recovery. Supplementation with this mineral may also help treat chronic tying-up in horses.
Magnesium oxide is the recommended supplemental source of this mineral for horses with good bioavailability. Compared to Magnesium Sulfate (Epsom Salts), it is safer and less likely to result in diarrhea.
Research shows that it is 70% absorbed from the horse’s gastrointestinal tract. While there are other magnesium sources with higher bioavailability, magnesium oxide provides the best value for supplementing your horse’s diet.
You should always consult a qualified nutritionist before altering your feed program. Submit your horse’s diet for analysis online and one of our equine nutritionists will be happy to provide a complementary review.
|< 200 kg||1/2 scoop||15 g|
|200 – 500 kg||1 scoop||29 g|
|> 500 kg||1.5 scoops||44 g|
|1 scoop = 29.6 cc = 29 grams|
0.5 scoops = 14.5 grams Magnesium Oxide
0.5 scoops = 8 grams Magnesium (Mg)
1 scoop = 29 grams Magnesium Oxide
1 scoop = 16 grams Magnesium (Mg)
A scale should be used with all individual ingredients to ensure accurate dosing
Per gram serving
|Nutrient||Concentration||Per 29 G|
|Quantity||Days Supplied||Serving Size||Cost Per Day|
|Cost Per Day||15 g / day||$0.10|
|30 g / day||$0.21|
Customer Questions About This Product
- I have Magnesium Oxide from mad barn via a supplier. My mare is on Omneity Pellets and weighs approx 800lb. She has been a bit stiff doing hill work and her muscles are tight in her hinds. Would giving 1tbsp of mgo be too much on days of extreme hill work to aid in relaxing the muscles She. She is 20 and an IR Cushings horse but well managed and very fit.
- Q I have Magnesium Oxide from mad barn via a supplier. My mare is on Omneity Pellets and weighs app...... Read moreA Hi Cheryl, If you're feeding 200 grams of Omneity Pellets, you will be providing 5.2 g of magnesium. One tablespoon of magnesium oxide will provide an additional ~7 grams of magnesium. For an 800 lb horse, this is an acceptable range of supplementation. How does the palatability of magnesium oxide compare to magnesium malate?
- Q How does the palatability of magnesium oxide compare to magnesium malate?A Magnesium oxide is more concentrated than magnesium malate so you need a much smaller serving size to provide the same amount of magnesium. This can help with palatability as you will not need to feed as much. I have heard that magnesium oxide is poorly absorbed compared to other magnesium, particularly those in liquid form, and that it will sit in the hindgut. Can you speak to this?
- Q I have heard that magnesium oxide is poorly absorbed compared to other magnesium, particularly th...... Read moreA
This has been debunked by research studies. Compared to commonly supplemented forms of magnesium, Coudray et al showed that magnesium oxide has better than average absorption from the mammalian gut. https://pubmed.ncbi.nlm.nih.gov/16548135/ Should I give my horse magnesium if she is already on Visceral plus?
- Q Should I give my horse magnesium if she is already on Visceral plus?A Visceral+ already contains a very high level of magnesium, so you would not need to supplement additional magnesium, in the form of magnesium oxide. If my horse is on visceral plus are they already getting enough magnesium with this supplement?
- Q If my horse is on visceral plus are they already getting enough magnesium with this supplement?A Hi Ashley - Thank you for your question. Visceral+ contains a high level of magnesium, but we recommend that all horses be on a comprehensive vitamin and mineral supplement, like Omneity, that contains adequate magnesium. While your horse is on Visceral+, there is no need to supplement additional magnesium if your horse is already receiving a balanced diet. Does this contain pure magnesium?
- Q Does this contain pure magnesium?A This product is pure Magnesium Oxide. It has a magnesium concentration of 56%, and does not contain any fillers. If you were to supplement 10 grams, you would be supplying ~ 5.6 grams of elemental magnesium. The feeding rate of the Magnesium Oxide varies with the composition of your horse's current diet and what you are trying to accomplish. Is your magnesium oxide supplement a powder?
- Q Is your magnesium oxide supplement a powder?A Yes, it is a bulk powder. What dosage of Magnesium should I feed?
- Q What dosage of Magnesium should I feed?A The dosage of the Magnesium Oxide varies with the composition of your horse's current diet and what you are trying to accomplish. We can help you with an analysis of your horse's diet if you are interested. Generally, if the diet is balanced with a good quality vitamin and mineral supplement, there should be no need to supplement additional magnesium. Some health conditions warrant higher than the recommended levels, though, so that is why we have it available. I am interested in Magnesium, but also interested in your Omneity mineral and vitamin as it has a broader profile of ingredients. If I feed Omneity I gather that I don't need to feed additional magnesium. Is that correct?
- Q I am interested in Magnesium, but also interested in your Omneity mineral and vitamin as it has a...... Read moreA Omneity will certainly cover all of the key trace minerals and vitamins needed for optimal health that can't be obtained from hay alone. You're right that you wouldn't need to feed additional magnesium, because it already contains high levels. The thing about magnesium is, it can help with certain issues (muscle stiffness, excitability etc.), but that's usually only if it is low in the diet to begin with. Can I give my horse magnesium if he is already getting Omneity?
- Q Can I give my horse magnesium if he is already getting Omneity?A Omneity already contains an optimal amount of magnesium. You wouldn't need to supplement with magnesium if your horse gets Omneity, unless his work level gets up into the heavier level. How much magnesium oxide should I feed per day?
- Q How much magnesium oxide should I feed per day?A The typical amount to feed per day is 10 grams and the concentration is 56% magnesium, so 10 grams would supply 5.6 grams of actual magnesium. How long will one kilogram of magnesium last for my horse?
- Q How long will one kilogram of magnesium last for my horse?A It depends on your feeding rate. For a 500 kg horse, a typical feeding rate is 10 grams per day. At that rate, 1 kg will last 100 days. How do I feed the magnesium to my horse? Does it come in a block? Do I mix it in water or in their feed?
- Q How do I feed the magnesium to my horse? Does it come in a block? Do I mix it in water or in thei...... Read moreA Our magnesium is a bulk powder and intended to be mixed in with your horse's feed or top dressed. I am interested in the magnesium supplement. Do you have stores that carry it or is it online only?
- Q I am interested in the magnesium supplement. Do you have stores that carry it or is it online only?A Our Magnesium Oxide is only available online. We provide free shipping on all orders over $40.
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