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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.
RACE ‘N WIN Textured Feed (BUCKEYE Nutrition)
Complete FeedComplete Feed
EnergyEnergy
Gut HealthGut Health
PerformancePerformance
RACE 'N WIN is a textured feed designed for performance horses who require high-energy feed. It also contains added amino acids, beet pulp, probiotics, and prebiotic ingredients.
Race 13 (Hallway)
Competition HorsesCompetition Horses
DigestionDigestion
FiberFiber
PerformancePerformance
Hallway's Race 13 is a textured sweet feed with high energy density to meet the calorie requirements of performance horses. It provides moderate 6% fat and 10% fibre content.
Race First (Excel Equine Feeds)
Competition HorsesCompetition Horses
HealthHealth
NutritionNutrition
PerformancePerformance
Race First is a textured feed from Excel Equine Feeds. Race First is intended for horses in heavy work, and contains ingredients intended to support digestive health.
Race Horse Feed (Lifeline)
Competition HorsesCompetition Horses
EnergyEnergy
FiberFiber
NutritionNutrition
Race Horse Feed by Lifeline is a feed formulated for performance horses with high energy demands. This feed contains 14% protein, 7% fat, and 12% fiber.
Race Lite Cubes (Dodson & Horrell)
Competition HorsesCompetition Horses
ExerciseExercise
NutritionNutrition
Organic Trace MineralsOrganic Trace Minerals
Race Lite Cubes is a lower protein racing feed made for horses beginning training or on a lighter training schedule. This feed contains a protein content of 12%, a fibre level of 16%, and a moderate NSC content of 19%.
Race Lite Muesli (Dodson & Horrell)
Amino AcidAmino Acid
ExerciseExercise
Mineral BalanceMineral Balance
PerformancePerformance
Race Lite Muesli is a textured lower protein racing feed made for horses beginning training or on a lighter training schedule. This feed contains a protein content of 12%, a fibre level of 9%, and moderate fat content of 4.5%.
Race Mix (Dunstan)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Race Mix by Dunstan is a complete, balanced feed providing working horses with protein, energy, vitamins and minerals for performance and health.
Race Ready GT (Purina)
Competition HorsesCompetition Horses
DigestionDigestion
EnergyEnergy
PerformancePerformance
Purina® Race Ready® GT is a textured feed intended for equine athletes and race horses. It is designed to provide a higher energy density and gut support ingredients to meet the needs of performance horses.
Race Ready® Horse Feed (Purina Mills)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
Gut HealthGut Health
PerformancePerformance
Race Ready is a high-energy textured feed targeted to meet the calorie requirements of racehorses. It provides 12% crude protein, 8% crude fat, 9% fibre, and contains molasses and vegetable oil.
Racehorse Cubes (Dodson & Horrell)
Competition HorsesCompetition Horses
FatFat
GrainsGrains
NutritionNutrition
Racehorse Cubes is a feed designed for racehorses in full training. This feed is high in NSC to give the horses an energy boost. It is also high in protein for proper muscle building and includes some ricebran to support a good body condition.
Racehorse Cubes (Red Mills)
Competition HorsesCompetition Horses
EnergyEnergy
GrainsGrains
StaminaStamina
Racehorse Cubes from Red Mills is intended for racehorses in moderate to full training or horses needing a high-energy cereal diet. This feed contains grains such as oats, barley, and maize.
RaceOn Gastro Form (NAF Equine)
Competition HorsesCompetition Horses
FiberFiber
Gut HealthGut Health
ProbioticProbiotic
RaceOn Gastro Form by NAF Equine is a powdered gut supplement that is intended to support stomach acid, protect the stomach wall, and provide pre- and probiotics for gut function.
Racing Balancer (Dodson & Horrell)
GrainsGrains
PerformancePerformance
ProteinProtein
Ration BalancerRation Balancer
Racing Balancer is a feed intended to balance a racehorse's diet and meant to be fed alongside oats. This feed adds additional protein required for muscle building, recovery, and the vitamins and minerals needed for proper nutrient absorption.
Racing Cube (Pryde’s EasiFeed)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
EnergyEnergy
PerformancePerformance
Racing Cube by Pryde's EasiFeed is a complete feed in extruded cube form. It is intended for race, performance and sport horses.
Racing Formula (DAC)
HealthHealth
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Racing Formula by DAC is a vitamin and mineral supplement designed for high performance horses. It is formulated with trace minerals, Vitamin E , biotin and probiotics.
Radiate (Excel Equine Feeds)
HealthHealth
NutrientsNutrients
NutritionNutrition
Weight IssuesWeight Issues
Radiate from Excel Equine Feeds is a pelleted feed. This feed is intended for hard keepers. Radiate contains 12% protein and 10% fat.
Rancher’s Complete Pellet (Trouw)
Caloric EnergyCaloric Energy
HealthHealth
NutrientsNutrients
NutritionNutrition
Rancher's Complete Pellet by Trouw Nutrition is a complete feed intended to meet the nutritional needs of all horse types.
Rancher’s Sweet – Texture (Trouw)
Gut HealthGut Health
HealthHealth
NutrientsNutrients
NutritionNutrition
Rancher's Sweet Texture by Trouw is a sweet feed intended for horses in light to medium work.
Ration Balancer (Woody’s Horse Nutrition)
DigestionDigestion
Grain FreeGrain Free
ProteinProtein
Ration BalancerRation Balancer
Woody’s Feed Ration Balancer is a concentrated, pelleted feed intended to balance a forage-based diet. It provides chelated trace minerals and added probiotics. This feed is intended for all horses and ponies at any level of work.
Ration Balancer Original (Lifeline)
DigestionDigestion
Grain FreeGrain Free
HealthHealth
Ration BalancerRation Balancer
Ration Balancer Original by Lifeline is a grain-free pelleted supplement intended for horses who are sensitive to carbohydrates.
Ration Balancer Pellets (Ritchie Smith – Harmony)
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
ProteinProtein
Ration BalancerRation Balancer
Ration Balancer Pellets from Ritchie Smith's Harmony is a low starch, low sugar product that is a source of protein. It can be supplied to any horse and can help meet protein requirements when forage doesn't.
Re-Leve Cubes (Saracen Horse Feeds)
Complete FeedComplete Feed
FiberFiber
ProteinProtein
UlcersUlcers
Re-Leve Cubes is a pelleted feed formulated for horses that have ulcer issues, need a low starch diet, or have nervous temperaments.
Recharge Mash (Krafft)
DigestionDigestion
EnergyEnergy
Gut HealthGut Health
RecoveryRecovery
Recharge Mash by Krafft is a an oat-free mash intended to increase water intake in horses requiring a fast recovery from exercise, travel, stress or digestive upset.
Refit (Excel Equine Feeds)
DigestionDigestion
MuscleMuscle
PerformancePerformance
RecoveryRecovery
Refit by Excel Equine Feeds is a pelleted supplement intended to support digestive health, muscle recovery, energy metabolism and immunity in performance horses.
Regener8 Cubes (Dodson & Horrell)
Competition HorsesCompetition Horses
NutritionNutrition
PerformancePerformance
RecoveryRecovery
Regener8 Cubes by Dodson & Horrell is a high protein feed that supports high performance horses and provides an additional elevated amount of vitamin E. This feed intends to help recovery specifically, with added amino acids and antioxidants to help in this process.
Regenerex (Basic Equine Nutrition)
Bone HealthBone Health
ExerciseExercise
JointsJoints
RecoveryRecovery
Regenerex is a joint and inflammation supplement from Basic Equine Nutrition. It is composed of MSM, Glucosamine, Calcium, Magnesium, Grape Seed Extract, Boswellia Extract, and Manganese.
Release (Hygain)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
HealthHealth
Weight IssuesWeight Issues
Release by Hygain is a high-energy textured feed intended for performance horses. Release contains chelated minerals and natural vitamin E intended to support hard keepers.
ReLyte (Enviro Equine)
Amino AcidAmino Acid
MuscleMuscle
PerformancePerformance
RecoveryRecovery
ReLyte by Enviro Equine is a supplement intended to support muscle function, energy metabolism and promote recovery following strenuous exercise in horses. It is formulated for horses in hard work or horse that are travelling.
Remission Hoof Supplement (AniMed)
Hoof HealthHoof Health
ProbioticProbiotic
Toxin BinderToxin Binder
YeastYeast
Remission Hoof Supplement is an equine supplement composed of amino acids, vitamins and minerals to support hoof health. It provides 20 mg of biotin per serving.
RepleniMash (Purina)
DigestionDigestion
HydrationHydration
PerformancePerformance
VitaminsVitamins
RepleniMash from Purina is a mash that is intended to support recovery, coat health, digestion, and hydration. It is meant for any life stage performance horse.
Resolve (Dunstan)
Complete FeedComplete Feed
FiberFiber
JointsJoints
NutritionNutrition
Resolve by Dunstan is a low starch feed intended to meet the nutrient requirements of horses and provide joint support.
Resolve (Tribute)
EnergyEnergy
ImmunityImmunity
MuscleMuscle
PerformancePerformance
Resolve is a pelleted complete feed from Tribute that is formulated to provide high-fat and high-fibre content with an NSC of 17.5%. It provides added Vitamin E which can support antioxidant status.
Respiratory Balancer (Horslyx)
Competition HorsesCompetition Horses
Hoof HealthHoof Health
Mineral BalanceMineral Balance
RespiratoryRespiratory
Respiratory Balancer from Horslyx is intended for performance and active horses of all ages and breeds. This balancer is designed to support a healthy respiratory system, immunity, and hoof health.
Respond High Grain Formula (Nutrena)
Competition HorsesCompetition Horses
EnergyEnergy
GrainsGrains
Weight IssuesWeight Issues
Respond High Grain Formula is a sweet feed style complete feed formulated for the high energy requirements of racehorses. It provides 12% protein and 6% fat with low levels of fibre.
Restore SR (Kentucky Equine Research)
ElectrolyteElectrolyte
ExerciseExercise
HydrationHydration
RecoveryRecovery
Restore SR is a slow-release electrolyte supplement for horses. It contains sodium, chloride, potassium and magnesium to replace electrolyte minerals that are lost in sweat.
Revive Senior (Bluegrass Horse Feed)
Complete FeedComplete Feed
JointsJoints
SeniorSenior
Weight IssuesWeight Issues
Revive Senior from Bluegrass Horse Feed is a feed that is meant to be highly digestible, support condition and joint health in senior horses. This feed can encourage weight gain and can be fed to horses with missing or worn teeth.
RG 14 (Hallway)
EnergyEnergy
FiberFiber
Gut HealthGut Health
ProteinProtein
RG 14 is a textured feed from Hallway, fortified with Stamm 30. This feed provides energy from digestible fibres and vegetable oil. RG 14 contains 14% protein, 6% fat, and 14% fibre.
Round-Up (Manna Pro) [Discontinued]
FiberFiber
Hay StretcherHay Stretcher
NutritionNutrition
ProteinProtein
Round-Up by Manna Pro is an alfalfa-based horse feed that contains 12% protein and 2% fat. It contains vitamins as well as organic and inorganic minerals.
Safe ‘N Easy Complete (Buckeye)
Complete FeedComplete Feed
DentalDental
GrainsGrains
NutritionNutrition
Buckeye SAFE 'N EASY™ Complete Pelleted Feed is a feed intended for horses or ponies with dental issues or horses with limited forage in their diet. It is meant to provide an easy-to-chew fiber blend with no corn or molasses.
SAFE ‘N EASY Pelleted Feed (BUCKEYE Nutrition)
Complete FeedComplete Feed
Easy KeeperEasy Keeper
FiberFiber
HindgutHindgut
Buckeye Safe 'N Easy™ Pelleted Feed is a 12.5% NSC horse feed intended for starch-sensitive horses and ponies or those that require a lower calorie diet. It is formulated with no corn or molasses.
Safe ‘N Easy Senior Extruded Feed (Buckeye)
DentalDental
NutrientsNutrients
NutritionNutrition
SeniorSenior
Safe 'N Easy Senior is an extruded feed in an easy-to-chew format for older horses and ponies with dental issues. This feed also contains prebiotics and probiotics to support gut health. This feed contains 14.5% NSC.
SAFE ‘N EASY Performance (BUCKEYE Nutrition)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
Mineral BalanceMineral Balance
PerformancePerformance
Buckeye SAFE 'N EASY™ Performance is a pelleted horse feed that provides high energy density from fat and fibre. It has a 13.5% NSC and is corn- and molasses-free.
SAFE ‘N EASY Textured Feed (Buckeye)
Complete FeedComplete Feed
DentalDental
Gut HealthGut Health
NutrientsNutrients
Buckeye SAFE 'N EASY Textured Feed is a 16.5% NSC feed made without corn or molasses. This feed provides moderate energy density and is intended for horses requiring a low calorie diet.
Safe and Sound (Dodson & Horrell)
FiberFiber
Hoof HealthHoof Health
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Safe and Sound by Dodson & Horrell is a feed designed for horses with metabolic disorders, specifically for laminitis. This feed is lower in NSC content, features a very high fibre content of 23%, and includes an elevated biotin level for additional hoof support.
Safe Performance Controlled Starch Formula (Manna Pro)
Complete FeedComplete Feed
FatFat
NutritionNutrition
PerformancePerformance
Safe Performance Controlled Starch Formula from Manna Pro is a complete feed designed for horses at all life stages. It contains 14% crude protein and 17% NSC. Safe Performance Controlled Starch Formula contains Max-E Glo® Stabilized Rice Bran as a source of fat and energy.
Safe Performance Elite High Fat (Manna Pro)
Complete FeedComplete Feed
FatFat
NutritionNutrition
PerformancePerformance
Safe Performance Elite High Fat from Manna Pro is a beet pulp-based complete feed designed for horses at all life stages. It contains 12% crude protein and 18% NSCs. Safe Performance Elite High Fat contains Max-E Glo® Stabilized Rice Bran as a source of fat and energy. This feed contains no added corn or molasses.
Safe Performance Senior (Manna Pro)
Complete FeedComplete Feed
FiberFiber
NutritionNutrition
SeniorSenior
Safe Performance Senior from Manna Pro is a pelleted feed designed for senior horses in work. It is formulated with Max-E Glo® stabilized rice bran and beet pulp. It is a corn- and molasses-free formulation that contains 14% crude protein, 7% crude fat, and 19% NSC.
Safe Performance Special Diet (Manna Pro)
Complete FeedComplete Feed
FiberFiber
HealthHealth
Metabolic SyndromeMetabolic Syndrome
Safe Performance Special Diet from Manna Pro is a pelleted feed for adult horses. It uses Max-E Glo® stabilized rice bran as a source of fat and fiber. It contains 14% crude protein, 3% crude fat, and 17% NSC. This product uses a mix of organic and inorganic trace minerals.
Safe Starch Forage (Triple Crown)
ForageForage
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Ration BalancerRation Balancer
Triple Crown Safe Starch® Forage is a forage-based feed containing a mixture of orchard and timothy hays fortified with vitamins, minerals and direct-fed microbials.
SafeChoice Maintenance (Nutrena)
Complete FeedComplete Feed
DigestionDigestion
FiberFiber
NutritionNutrition
Nutrena SafeChoice Maintenance is a pelleted horse feed that provides a maximum of 25% NSC (20% starch and 5% sugar). It is intended as a low-starch feed to maintain body condition.

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