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Magnesium Oxide - Feed Ingredient

Magnesium Oxide is an inorganic compound composed of magnesium and oxygen. It is typically produced through the calcination of magnesite (magnesium carbonate) or by processing magnesium hydroxide derived from seawater. As a fine, white powder, Magnesium Oxide is valued for its high concentration of magnesium and stability under a range of conditions.

In equine diets, Magnesium Oxide serves as a supplemental source of magnesium, an essential mineral that supports muscle function, nerve conduction, and bone integrity. It is commonly included in feed formulations or supplements to help horses meet their daily magnesium requirements, especially when forages or other dietary components do not supply adequate levels. The bioavailability of Magnesium Oxide can vary depending on factors such as particle size and overall diet composition.

The following equine feeds, supplements and products contain Magnesium Oxide as an ingredient.

Feeds, Supplements & Products
AminoTrace+ Vitamin and Mineral Supplement (Mad Barn)
Hoof HealthHoof Health
Metabolic SyndromeMetabolic Syndrome
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
AminoTrace+ by Mad Barn is a complete, balanced equine mineral and vitamin supplement designed for horses with metabolic concerns. It is ideal for horses with IR, PPID, or high iron in the diet.
MagneChrome (Mad Barn)
AntioxidantAntioxidant
HealthHealth
HerbHerb
Metabolic SyndromeMetabolic Syndrome
MagneChrome from Mad Barn (formerly sold under the name IR Supplement) is a magnesium and chromium supplement for IR Horses. This supplement provides antioxidant and anti-inflammatory support which is critical for horses with metabolic conditions such as insulin resistance, laminitis and Cushing’s Syndrome
Magnesium Oxide (Mad Barn)
CalmingCalming
HealthHealth
IngredientIngredient
MuscleMuscle
Magnesium Oxide is a concentrated source of mineral magnesium that can be added to equine diets. Magnesium supplementation has been shown to have a calming effect in nervous horses, as well as support proper muscle function.
Natural E/Organic Se (Mad Barn)
AntioxidantAntioxidant
Organic Trace MineralsOrganic Trace Minerals
RecoveryRecovery
VitaminsVitamins
Natural E/Organic Se is a pelleted supplement providing organic Selenium yeast and natural Vitamin E. These two nutrients are important antioxidants that support muscle function and anti-inflammatory pathways.
Omneity P – Pellets – Vitamin & Mineral Supplement (Mad Barn)
Gut HealthGut Health
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
Ration BalancerRation Balancer
Omneity Pellets is a balanced mineral and vitamin supplement for horses in a palatable pellet form. It provides 100% organic trace minerals, complete B-vitamin fortification, added Vitamin E, yeast and digestive enzymes.
Omneity Premix – Vitamin & Mineral Supplement (Mad Barn)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Omneity Premix is a balanced mineral and vitamin supplement for horses providing 100% organic trace minerals, complete B-vitamin fortification, added Vitamin E, yeast, and digestive enzymes.
Optimum (NAF Equine)
Easy KeeperEasy Keeper
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
VitaminsVitamins
Optimum by NAF Equine is a pelleted ration balancer that is formulated to provide the vitamins and minerals for a high-fiber and low concentrate diet or a performance diet.
Original 12 Textured (McCauley’s Equine Formulas)
BroodmareBroodmare
Complete FeedComplete Feed
LactationLactation
StallionStallion
Original 12 Textured is a palatable oat-based feed targeted to broodmares and stallions. It is formulated with added yeast and organic minerals. It is designed to promote healthy gut function.
Original 14 Pelleted (McCauley’s)
Feed EfficiencyFeed Efficiency
GrainsGrains
GrowthGrowth
NutritionNutrition
McCauley's Original® 14 Pelleted is a pelleted horse feed with 14% protein to meet the needs of breeding and growing horses. This oat-based formula contains 3.5% fat and 12% fibre.
Original 14 Textured (McCauley’s Equine Formulas)
Feed EfficiencyFeed Efficiency
GrowthGrowth
HealthHealth
LactationLactation
McCauley's Original 14 Textured is an oat-based feed for stallions, breeding, growing, and performance horses. It is fortified with organic minerals and contains yeast for digestive health.
Original 16 Textured (McCauley’s Equine Formulas)
BroodmareBroodmare
Feed EfficiencyFeed Efficiency
FoalFoal
LactationLactation
McCauley's Original 16 Textured is an oat-based horse feed for breeding and growing horses. It contains higher protein (16%) to meet the needs of growing yearlings and lactating broodmares.
Original Balancer (Horslyx)
Easy KeeperEasy Keeper
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Original Balancer from Horslyx is intended to balance nutrient deficiencies in horses and ponies who eat primarily forage or grass. This product contains cane molasses to help palatability and biotin to support hoof health.
Original Multi Balancer (Spillers Feeds)
Gut HealthGut Health
Hoof HealthHoof Health
ImmunityImmunity
Ration BalancerRation Balancer
VitaminsVitamins
The Original Multi Balancer from Spillers Feed is cereal grain-free, low in sugars, and low in starches. This feed is high in Vitamins and minerals such as Vitamin A, Vitamin D3, Vitamin E, Copper, and Zinc.
Original® 12 Pelleted (McCauley’s Equine Formulas)
BroodmareBroodmare
Feed EfficiencyFeed Efficiency
Ration BalancerRation Balancer
StallionStallion
McCauley's Original® 12 Pelleted is a palatable and digestible oat-based feed for broodmares and stallions. It provides 12% protein, 12% fiber, 3.5% fat, and contains organic minerals.
Original® 16 Pelleted (McCauley’s Equine Formulas)
Feed EfficiencyFeed Efficiency
FoalFoal
GrowthGrowth
LactationLactation
Original® 16 Pelleted is an oat-based feed targeted to breeding horses and yearlings. It provides 16% crude protein and is formulated for growing horses.
Osteo-Gen (Equi-Force)
Bone HealthBone Health
ExerciseExercise
GrowthGrowth
JointsJoints
Osteo-Gen is a supplement that is intended to promote bone health and cartilage repair. It is suitable for horses of all ages and work levels.
Outlast Gastric Support Supplement (Purina)
ColicColic
DigestionDigestion
Gut HealthGut Health
UlcersUlcers
Purina® Outlast® Gastric Support Supplement is an equine gut product designed to support gastric health and pH balance. The primary active ingredients include alfalfa and seaweed-derived calcium.
Parkmore Special Vitamin/Mineral Pelleted Supplement (Parkmore Supplements)
HealthHealth
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Parkmore Special Vitamin/Mineral Pelleted Supplement is a trace mineral and vitamin supplement designed for all ages and working classes of horses. It can be fed in addition to grain or on its own.
Pastime (McCauley’s Equine Formulas)
Feed EfficiencyFeed Efficiency
HealthHealth
NutritionNutrition
Ration BalancerRation Balancer
Pastime is an oat-based pelleted feed for adult horses at maintenance or in light work. It targets pleasure horses with lower energy density and fat content.
Pasture Cubes (Dodson & Horrell)
Complete FeedComplete Feed
GrainsGrains
HerbHerb
NutritionNutrition
Pasture Cubes by Dodson & Horrell is a feed that is lower in protein and has an elevated fibre level. This feed is for horses and ponies that need some additional fibre and vitamins, and minerals in their diet.
Pasture Lick (DAC)
HealthHealth
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Pasture Lick by DAC is a vitamin and mineral supplement lick for mature horses. It is formulated with Vitamin E, biotin, and yeast.
Pasture Lick (Saracen Horse Feeds)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Pasture Lick is a vitamin and mineral lick intended to be supplied to horses on pasture or on a forage-based diet.
Pasture Mix (Dodson & Horrell)
Complete FeedComplete Feed
FlavorFlavor
GrainsGrains
NutritionNutrition
Pasture Mix by Dodson & Horrell is a textured feed that is lower in protein and has an elevated fibre level. This feed is for horses and ponies that need some additional fibre and vitamins, and minerals in their diet.
Pasture Plus (Dunstan)
BroodmareBroodmare
MareMare
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
Pasture Plus by Dunstan is an extruded mineralized nugget intended to supply the mineral requirements of pregnant mares that live on pasture. It is formulated for New Zealand Horses living under the environmental conditions found in New Zealand.
Patriot 36 Ration Balancer (ADM Animal Nutrition)
Mineral BalanceMineral Balance
NutrientsNutrients
ProteinProtein
VitaminsVitamins
Patriot 36 Ration Balancer by ADM Animal Nutrition is a pelleted supplement that provides protein, vitamins, and minerals for all types of horses. It should be fed along with hay or pasture (forage) and any grain or concentrate feeds.
Patriot Feed Easy Complete (ADM Animal Nutrition)
Feed EfficiencyFeed Efficiency
FiberFiber
Gut HealthGut Health
PerformancePerformance
Patriot Feed Easy is a pelleted complete forage/feed mix designed to meet the nutritional needs of mature horses when forage supplies are low. It provides less than 20% NSC.
Patriot Mare & Foal Horse Feed (ADM Animal Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Patriot Mare & Foal is a pelleted complete feed designed to meet the needs of gestating and lactating mares as well as foals from 0 to 18 months of age. Patriot Mare & Foal is palatable to encourage consumption.
Patriot Performance Horse Feed (ADM Animal Nutrition)
Complete FeedComplete Feed
EnergyEnergy
ExerciseExercise
PerformancePerformance
Patriot Performance is a pelleted complete feed that is formulated for mature performance horses and broodmares. It provides vegetable fat and digestible fibre sources and contains ~20% NSC.
Patriot Quick Performance (ADM Animal Nutrition)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
ExerciseExercise
PerformancePerformance
Patriot Quick Performance is a pelleted feed formulated for use when forage supply is limited. It contains 20 - 30% NSC and is intended for mature athletic horses that require additional energy.
Patriot Senior Complete Horse Feed (ADM Animal Nutrition)
Complete FeedComplete Feed
FiberFiber
SeniorSenior
ToplineTopline
Patriot Senior is a pelleted complete forage-feed product for senior horses. It is designed to be easy to chew and to meet nutritional needs when forage availability is low.
Pectigus Balancer Maintenace Diet (Hestevard)
Gut HealthGut Health
HealthHealth
Low NSC FeedsLow NSC Feeds
ProbioticProbiotic
Pectigus Balancer Maintenance Diet by Hestevard is a pelleted feed intended to support gut function and overall health in all horses and ponies.
PegaVite (Equestrizone)
IngredientIngredient
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
PegaVite from Equestrizone provides essential daily vitamins and minerals to balance equine diets. It provides ingredients such as calcium carbonate and monocalcium phosphate that forage and concentrate grains may be lacking.
Pennwoods 13 to 36 Advanced (Pennwoods Equine)
FatFat
FoalFoal
GrowthGrowth
ProteinProtein
Pennwods 13 to 36 Advanced is a growth and performance supplement targeted to yearling and two-year-old horses. It contains a blend of proteins, fats, vitamins, and minerals.
Perfect Gentleman (Dodson & Horrell)
CalmingCalming
HealthHealth
HerbHerb
StressStress
Perfect Gentleman by Dodson & Horrell is a textured herbal supplement that intends to promote an even temperament in geldings exhibiting inappropriate behaviour. It contains chamomile, lemon balm, and magnesium oxide.
Perfectly Senior Horse Summer Pellet (Kruse’s Perfection Brand)
FiberFiber
GrainsGrains
JointsJoints
SeniorSenior
Perfectly Senior Horse Summer Pellet by Kruse's Perfection Brand is a pelleted feed that is intended to be fed to senior maintenance, performance, and breeding horses. This feed is meant to be fed as a complete feed or supplemented with hay or pasture equivalent.
Perfectly Senior Horse Winter Pellet (Kruse’s Perfection Brand)
BroodmareBroodmare
Complete FeedComplete Feed
PerformancePerformance
SeniorSenior
Perfectly Senior Horse Winter Pellet by Kruse's Perfection Brand is a feed that intends to be fed to senior maintenance, performance, and breeding horses either as a complete feed or supplemented with hay or pasture equivalent.
Perform Gold (Triple Crown)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
FatFat
FiberFiber
Perform Gold is a high energy density pelleted feed designed for performance horses. It provides 12.5% protein, 12% fat and 15.3% NSC, and contains a mixture of organic and inorganic minerals.
Perform Safe (Seminole)
Complete FeedComplete Feed
EnergyEnergy
Low NSC FeedsLow NSC Feeds
PerformancePerformance
Perform Safe™ is a low-starch, high-fat pelleted feed targeted to growing, breeding and mature performance horses. It contains 12% protein and 8% fat with energy sources such as soybean hulls, beet pulp and rice bran.
Performa Care Balancer (Red Mills)
Competition HorsesCompetition Horses
ImmunityImmunity
MuscleMuscle
NutritionNutrition
Performa Care Balancer from Red Mills is intended for performance horses or used as a topper for a low-concentrate feed. This feed contains 43% starch, 30% protein, and 9% fiber.
Performance 12 (Excel Equine Feeds)
ExerciseExercise
HealthHealth
NutritionNutrition
PerformancePerformance
Performance 12 is a textured feed from Excel Equine Feeds. This feed contains fat sources and digestible fibre intended to support the needs of performance horses.
Performance 14 (Havens Horsefeed)
Caloric EnergyCaloric Energy
ExerciseExercise
MuscleMuscle
PerformancePerformance
Havens Performance 14 is a high-energy feed for equine athletes. This feed contains banana flakes and extra electrolytes to maintain fluid balance, muscle contraction, and neural activity. It has 14% crude protein and 31% NSC with ingredients such as wheat, alfalfa meal, and oats.
Performance Advantage (Tribute Equine)
EnergyEnergy
FatFat
FoalFoal
PerformancePerformance
Tribute Performance Advantage® is a grain-based, textured feed formulated to meet the higher energy requirements of performance horses. It provides 8% fat and 31% NSC.
Performance Balancer (Dodson & Horrell)
Hoof HealthHoof Health
JointsJoints
PerformancePerformance
Ration BalancerRation Balancer
Performance Balancer is a performance feed meant to be fed as a low intake feed or alongside another feed. This feed provides the vitamins and minerals to support joint care, a higher level of biotin for hoof support, and yeast for a healthy hindgut.
Performance Concentrate Muesli (Dodson & Horrell)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
VitaminsVitamins
Performance Concentrate Muesli by Dodson & Horrell is a high protein feed with a concentrated amount of vitamins and minerals. This feed is to be fed with oats and offers additional antioxidants and hoof support.
Performance Equine Mineral and Vitamin Formulation (Wild Gold)
ElectrolyteElectrolyte
Mineral BalanceMineral Balance
ProbioticProbiotic
VitaminsVitamins
Performance Equine Mineral and Vitamin Formulation by Wild Gold is a premixed supplement that is intended to provide vitamins, minerals, and probiotics to support optimal nutrient absorption.
Performance Horse (New Country Organics)
HindgutHindgut
NutritionNutrition
PerformancePerformance
YeastYeast
Performance Horse by New Country Organics is a textured supplement intended for maintenance diets for horses with moderate energy demands. It contains a mixture of oats, peas, barley, alfalfa pellets, kelp, and probiotics.
Performance Horse Mineral (Hoffman’s Horse Products)
Mineral BalanceMineral Balance
PerformancePerformance
RecoveryRecovery
VitaminsVitamins
Hoffman's Performance Horse Mineral is a pelleted mineral and vitamin supplement that provides a mix of organic and inorganic trace minerals. This supplement can be provided free-choice or as a top dressing with feed.
Performance Horsepower (ProHeritage Feeds)
FatFat
NutrientsNutrients
PerformancePerformance
YeastYeast
Performance Horsepower from ProHeritage Feeds is a feed that is high in fat and it is intended for working and performance horses. It also contains vitamins, minerals, and yeast.
Performance One (Pureform)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
ExerciseExercise
PerformancePerformance
Performance One is a concentrated supplement for performance horses providing glucosamine, MSM, creatine, amino acids, vitamins, trace minerals and electrolytes.
Performance Pelleted (Woody’s Horse Nutrition)
Competition HorsesCompetition Horses
FatFat
PerformancePerformance
ProteinProtein
Woody’s Performance Pelleted is a complete pelleted feed with higher energy density for working horses. It is formulated with beet pulp, alfalfa meal and oats, and contains 14% protein and 8% fat.
Performance Plus Complete (Bluebonnet Feeds)
FiberFiber
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Performance Plus Complete from Bluebonnet Feeds is an alfalfa-based pellet intended to replace some or all of the forage in a horse's diet. It contains 12% crude protein, 3.5% crude fat, and 29% crude fibre.
Performance Senior (Daily Dose Equine)
FatFat
FiberFiber
PerformancePerformance
SeniorSenior
Performance Senior by Daily Dose Equine is a textured feed that provides a high-calorie diet with 15% fat that is ideal for senior horses with dental issues or hard keepers.
Performance Textured (ProElite)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
PerformancePerformance
StaminaStamina
ProElite Performance Horse Feed is a textured feed intended for mature show and performance horses. It provides 12% fat and 18.3% NSC with energy sources including beet pulp, whole oats, wheat middlings, soybean hulls, and cane molasses.
Performance Textured (Woody’s Horse Nutrition)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
FatFat
ProteinProtein
Woody’s Performance Textured is a complete textured feed for exercising and performance horses. It provides 14% protein and 10% fat and is composed of oats, beet pulp, molasses and vegetable oil.
Performance Vitamins and Minerals (Dodson & Horrell)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
Mineral BalanceMineral Balance
VitaminsVitamins
Performance Vitamins and Minerals from Dodson & Horrell is a pelleted supplement that provides increased micronutrients for performance and breeding horses and ponies. This supplement also contains electrolytes to promote recovery and rehydration.
Performance XL (Manna Pro)
Competition HorsesCompetition Horses
NutritionNutrition
PerformancePerformance
ProteinProtein
Performance XL from Manna Pro is a complete feed designed for equine athletes with higher energy demands. It contains Calf-Manna® as a source of protein and Max-E Glo® Stabilized Rice Bran as a source of energy from fat. Performance XL is 12% crude protein, 8% crude fat, and 8% crude fibre.

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