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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.
Command (Barastoc)
AntioxidantAntioxidant
EnergyEnergy
Gut HealthGut Health
PerformancePerformance
Command from Barastoc is an oat-free muesli for performance horses that contains high levels of energy. It can contribute to antioxidants, immune health, and gut protection from stomach acid.
Competition 10 Cubes (Red Mills)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
NutritionNutrition
PerformancePerformance
Competition 10 Cubes from Red Mills is an oat-free feed intended for horses in moderate to heavy work and competition horses. This feed is designed to support performance, recovery, muscle development, and bone integrity.
Competition 10 Mix (Red Mills)
Complete FeedComplete Feed
NutritionNutrition
PerformancePerformance
RecoveryRecovery
Competition 10 Mix from Red Mills is intended for horses and ponies in light to heavy work and those travelling. This oat-free feed is meant to support performance, recovery, muscle development, and coat condition.
Competition 12 Cubes (Red Mills)
Competition HorsesCompetition Horses
EnergyEnergy
NutritionNutrition
StaminaStamina
Competition 12 Cubes from Red Mills is intended for horses in moderate to heavy work such as performance horses. This feed is meant to support recovery, muscle development, and body condition.
Competition 12 Mix (Red Mills)
Competition HorsesCompetition Horses
EnergyEnergy
NutritionNutrition
StaminaStamina
Competition 12 Mix from Red Mills is intended for horses in moderate to heavy work, those travelling, and those requiring fast-release energy. This feed is meant to support stamina and recovery for performance horses.
Competition Cubes (Dodson & Horrell)
Competition HorsesCompetition Horses
GrainsGrains
NutritionNutrition
PerformancePerformance
Competition Cubes by Dodson & Horrell is a feed for the performance horse with a protein content of 12%, a fat content of 5%, and a fiber content of 9.4%. This feed includes ingredients such as oats, wheatfeed, dried beet pulp, and rapeseed oil to support a healthy and active lifestyle.
Competition Mix (Dodson & Horrell)
Caloric EnergyCaloric Energy
GrainsGrains
MuscleMuscle
PerformancePerformance
Competition Mix by Dodson & Horrell is a feed designed to support the performance horse with 12% protein, 4.6% fat, and 11.6% fiber content. The feed ingredients supply organic B vitamins, organic amino acids, and yeast to provide added digestibility and support gut health.
Competitor (Barastoc)
AntioxidantAntioxidant
EnergyEnergy
Gut HealthGut Health
PerformancePerformance
Competitor from Barastoc is a pelleted feed for performance horses. It contains both slow and fast release energy, and it is highly digestible and promotes gut health. It also contains antioxidants.
Complement Advantage (Excel Equine Feeds)
FiberFiber
HealthHealth
NutrientsNutrients
NutritionNutrition
Complement Advantage by Excel Equine Feeds is a textured feed intended for hard keepers or horses in heavy training.
Complement Control (Excel Equine Feeds)
EnergyEnergy
HealthHealth
NutritionNutrition
PerformancePerformance
Complement Control by Excel Equine Feeds is a pelleted feed intended to provide nutrition with a low feeding rate for growing, performance, breeding and maintenance horses.
Complement Foundation (Excel Equine Feeds)
HealthHealth
ImmunityImmunity
NutrientsNutrients
NutritionNutrition
Complement Foundation by Excel Equine Feeds is a beet pulp based textured feed intended for all horse types.
Complete (Triple Crown)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
NutritionNutrition
PerformancePerformance
Triple Crown Complete is a high-fibre feed with beet pulp and added vitamins and minerals designed for performance horses. This feed provides 12% protein and 12% fat in a textured format.
Complete (Woody’s Feed)
Complete FeedComplete Feed
FatFat
FiberFiber
ProteinProtein
Woody's Complete is a grain-free, pelleted horse feed formulated to meet the needs of most adult horses. Energy sources include beet pulp, soybean hulls, alfalfa meal, rice bran, flaxseed, and vegetable oil.
Complete Horse 12 (Manna Pro)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
GrainsGrains
NutritionNutrition
Complete Horse 12 from Manna Pro is a pelleted feed for mature horses at maintenance or in light work. This feed is meant to be fed alongside hay and/or pasture. It contains 12% crude protein, 2% crude fat, and 24% crude fibre.
Complete Performer (Barastoc)
EnergyEnergy
JointsJoints
NutrientsNutrients
UlcersUlcers
Complete Performer from Barastoc is a feed that has high fiber and high palatability. It is meant to provide relief from ulcers, contribute to joint health, and is a source of slow releasing energy.
Complete Plus HA (Basic Equine Nutrition)
Amino AcidAmino Acid
Hoof HealthHoof Health
JointsJoints
NutrientsNutrients
Complete Plus HA is an equine joint supplement that provides a combination of minerals, vitamins and nutraceuticals. It contains hyaluronic acid, MSM, glucosamine, biotin, amino acids and flax.
Complete Supplement Pellets (Ritchie Smith – Harmony)
HealthHealth
NutrientsNutrients
NutritionNutrition
Ration BalancerRation Balancer
Complete Supplement Pellets from Ritchie Smith's Harmony is a vitamin, mineral, hoof, and gut supplement. Complete Supplement Pellets are intended for horses on forage-based diets, or horses with metabolic issues.
Complex 40 (Technavet)
HealthHealth
ImmunityImmunity
Mineral BalanceMineral Balance
VitaminsVitamins
Complex 40 is a vitamin and mineral supplement for horses. Complex 40 contains trace minerals and is intended to support immune response, collagen production and joint health.
Conditioning Fibre (Spillers Feeds)
Coat QualityCoat Quality
FatFat
FiberFiber
ToplineTopline
Conditioning Fibre from Spillers Feed is high in oil and low in starches and sugars. This feed is intended to calm horses and ponies, develop topline, and improve coat quality.
Conditioning Mix (Red Mills)
Complete FeedComplete Feed
Coat QualityCoat Quality
ToplineTopline
Weight IssuesWeight Issues
Conditioning Mix from Red Mills is an oat-free feed intended for horses needing extra condition and topline. This feed is meant to support weight gain, coat condition, and bone integrity.
Conditioning Supplement (Masterfeeds)
Caloric EnergyCaloric Energy
ExerciseExercise
PerformancePerformance
ToplineTopline
Masterfeeds Conditioning Supplement is an equine supplement designed for improved performance, weight gain and coat condition. It provides fat, protein, vitamins, macrominerals, and organic trace minerals. This supplement can be used to top-dress complete feeds or as a stand-alone vitamin and minerals balancer.
Convalescent Muesli (Dodson & Horrell)
Complete FeedComplete Feed
DigestionDigestion
GrainsGrains
RecoveryRecovery
Convalescent Muesli by Dodson & Horrell is intended for horses and ponies at rest or in recovery. It contains yeast to support digestion and gut health and QLC antioxidants for immune support.
Cool ‘N’ Conditioning Cubes (Red Mills)
Competition HorsesCompetition Horses
EnergyEnergy
NutrientsNutrients
NutritionNutrition
Cool 'N' Conditioning Cubes by Red Mills is intended horses and ponies in light to heavy work, those travelling and prone to stress, breeding stock, and young stock. It contains 12.25% protein, 7% fat, and 20% fibre.
Cool ‘N’ Cooked Mix (Red Mills)
EnergyEnergy
GrainsGrains
NutritionNutrition
RecoveryRecovery
Cool 'N' Cooked Mix from Red Mills is an oat-free feed. This cereal-based feed is intended for performance horses and horses in recovery. It contains cereals such as barley, maize, and wheat flakes.
Cool Feed Cubes (Red Mills)
Easy KeeperEasy Keeper
GrainsGrains
NutrientsNutrients
NutritionNutrition
Cool Feed Cubes from Red Mills is intended for horses in light to moderate work. It is meant to support muscle function, bone integrity, and coat quality. This feed contains 10% protein, 12% fiber, and 3.3% fat.
Cool Fusion (Lifeline)
EnergyEnergy
FatFat
FiberFiber
NutritionNutrition
Cool Fusion by Lifeline is a high-fat, high-fiber feed formulated for performance horses and stallions. This feed contains 12% protein, 12% fat, and 14% fiber.
Cool Mix (Havens Horsefeed)
BroodmareBroodmare
CalmingCalming
Caloric EnergyCaloric Energy
StallionStallion
Cool Mix by Havens Horsefeed is an alfalfa-based muesli feed with slow-releasing energy content for nervous horses. It contains several grains, soybean hulls, and added vitamins and minerals.
Cool Mix (Spillers Feeds)
Caloric EnergyCaloric Energy
FiberFiber
GrainsGrains
NutritionNutrition
Cool Mix from Spillers Feed is a textured feed best suited for horses and ponies in low to medium work. This feed contains a variety of cereals such as barley, maize, and peas.
Cool Vitality (Mitavite)
Gut HealthGut Health
NutritionNutrition
PerformancePerformance
Weight IssuesWeight Issues
Cool Vitality by Mitavite is a muesli intended to improve condition in horses by providing cool energy.
Copper Top-Up Cubes (Red Mills)
GrainsGrains
Mineral BalanceMineral Balance
NutritionNutrition
PerformancePerformance
Copper Top-Up Cubes from Red Mills is intended for horses in moderate to heavy work, broodmares, stallions, and youngstock. This feed is meant to support performance, stamina, coat condition, and hoof quality.
Country Acres 12% Pelleted Horse Feed Hi Fat (Purina Mills)
FatFat
HealthHealth
NutrientsNutrients
NutritionNutrition
Country Acres 12% Pelleted Horse Feed Hi Fat by Purina Mills is a pelleted feed containing vitamins and minerals. It is intended for all horse types.
Country Feeds Complete (Nutrena)- [Discontinued]
Complete FeedComplete Feed
EnergyEnergy
NutritionNutrition
ProteinProtein
Country Feeds Complete is a high fibre complete feed designed to provide 12% protein, 3% fat, and 22% NSC. It is marketed as a hay replacement.
CR ProFibre Crunch (Trouw Nutrition)
Complete FeedComplete Feed
FiberFiber
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
CR ProFibre Crunch is a mixed high fibre pellet and extruded feed with less than 10% NSC content. Energy sources include soy hulls, alfalfa, and beet pulp. ProFibreCrunch also contains flax as a source of omega-3 fatty acids.
Critical Care Metabolic Support (Natural Horse Vet)
MetabolismMetabolism
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
VitaminsVitamins
Critical Care Metabolic Support by Natural Horse Vet is a powdered supplement intended to support horses with insulin resistance, proper weight management, and thyroid function.
Crystalyx Stable-Lyx (Masterfeeds)
Mineral BalanceMineral Balance
NutrientsNutrients
ProteinProtein
VitaminsVitamins
Crystalyx Stable-Lyx is a free-choice mineral and vitamin supplement in a molasses block format for herd-feeding horses. It is a nutrient dense formula designed for all classes of horses.
Crystalyx Sweet 14% (Masterfeeds)
FlavorFlavor
Mineral BalanceMineral Balance
ProteinProtein
VitaminsVitamins
Crystalyx Sweet 14% is a free-choice mineral and vitamin block intended for use when beef cattle, sheep, goats, and equines are grazed in common pastures.
Cushcare Condition (Dodson & Horrell)
Complete FeedComplete Feed
HerbHerb
Metabolic SyndromeMetabolic Syndrome
Weight IssuesWeight Issues
Cushcare Condition by Dodson & Horrell is a pelleted feed high in fat, B vitamins, carotene, and QLC antioxidants. This feed supports weight gain and condition and has an NSC value of 11.44%.
Cushinaze (NAF Equine)
ImmunityImmunity
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
NutritionNutrition
Cushinaze by NAF Equine is a powdered immune supplement that intends to support vitality, provide support of the pituitary gland and gut function.
DAC Colt Grower (DAC)
Amino AcidAmino Acid
FoalFoal
GrowthGrowth
YeastYeast
Colt Grower by DAC provides vitamins and minerals for young horses. A proper vitamin and mineral balance is essential for development, as well as hoof and coat quality.
Daily Balancer (Spillers Feeds)
Amino AcidAmino Acid
NutrientsNutrients
Ration BalancerRation Balancer
VitaminsVitamins
Daily Balancer from Spillers Feed is cereal grain-free, low in sugar and starch, and has no added iron. This feed is intended for horses and ponies fed a forage-based diet.
Daily Combo (Empire Research)
Competition HorsesCompetition Horses
DigestionDigestion
IngredientIngredient
YeastYeast
Daily Combo from Empire Research is an equine digestion supplement. Daily Combo is formulated with vitamins, minerals, prebiotics, probiotics and yeast. This supplement is intended to support horses' gut function.
Daily Essentials Pellets (Formula 707)
GrowthGrowth
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Daily Essentials Pellets by Formula 707 is an pelleted equine vitamin and mineral supplement intended to support overall health in all classes of horses.
Daily Start Probiotic (Doctor’s Choice Supplements)
Feed EfficiencyFeed Efficiency
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
Daily Start Probiotic by Doctor's Choice Supplements is a pre/probiotic supplement intended to support gut health. It is designed for broodmares and horses that have difficulty keeping weight.
Daily Vitamins and Minerals (Dodson & Horrell)
Easy KeeperEasy Keeper
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Daily Vitamins and Minerals from Dodson & Horrell is intended for use in leisure and easy keeper horses and ponies. This supplement provides a complete range of vitamins and minerals to balance the horse's diet.
DailyWerks HD (HorseTech)
Hoof HealthHoof Health
JointsJoints
PerformancePerformance
Ration BalancerRation Balancer
DailyWerks HD by HorseTech is a powdered ration balancer intended to support hoof and joint health in horses in heavy work.
DailyWerks LD (HorseTech)
HealthHealth
Hoof HealthHoof Health
JointsJoints
Ration BalancerRation Balancer
DailyWerks LD by HorseTech is a daily ration balancer intended to provide hoof and joint support.
Decade Sprint Extreme (Poulin Grain)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
Mineral BalanceMineral Balance
VitaminsVitamins
Decade Sprint Extreme by Poulin Grain is a textured feed for performance horses and broodmares. It provides 13% protein, 8% fat and 10% fiber.
DeStress Equine (Hoffman’s Horse Products)
MuscleMuscle
NutrientsNutrients
StressStress
Weight IssuesWeight Issues
DeStress Equine from Hoffman's Horse Products is a pelleted supplement that is meant to help with the stress of being handling or transported. It contains electrolytes, amino acids, and aims to reduce weight and increase muscle development.
Diamond Balancer (Triple Crown)
Easy KeeperEasy Keeper
Grain FreeGrain Free
Metabolic SyndromeMetabolic Syndrome
NutrientsNutrients
Diamond Balancer by Triple Crown is a grain-free pelleted balancer formulated for adult horses with metabolic concerns. It provides 14% protein, 3% fat, and 15% fiber (as fed).
Diamond Perform (Triple Crown)
AntioxidantAntioxidant
FatFat
Gut HealthGut Health
PerformancePerformance
Diamond Perform from Triple Crown is a pelleted feed that is high in fat and fiber. It is intended for performance horses and is meant to assist with gut health and immunity.

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