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Magnesium Sulfate - Feed Ingredient

Magnesium sulfate (MgSO₄) is an inorganic compound composed of magnesium, sulfur, and oxygen. It is commonly available in hydrated forms, such as magnesium sulfate heptahydrate (Epsom salt). This compound is used in animal nutrition as a supplemental source of magnesium and sulfur, both of which play essential roles in physiological functions.

In equine nutrition, magnesium sulfate is included in feed formulations or supplements to support magnesium balance in the diet. Magnesium is critical for muscle function, nerve signaling, and enzyme activity. However, excessive supplementation should be avoided, as high doses of magnesium sulfate can have a laxative effect.

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

Feeds, Supplements & Products
Performance XL: Electrolytes (Mad Barn)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
PerformancePerformance
StaminaStamina
Performance XL: Electrolytes by Mad Barn is a scientifically formulated equine electrolyte supplement designed to support athletic performance and workout recovery. It contains an ideal blend of natural minerals and vitamins to promote hydration status and muscle function.
Essential (DePaolo Equine Concepts)
Amino AcidAmino Acid
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Essential by DePaolo Equine Concepts is a pelleted supplement that intends to promote healthy coat and hooves, and support a strong immune system. It contains ingredients such as L-Lysine, Biotin, and Vitamins A, B, D, and E.
Essential K (Tribute)
Amino AcidAmino Acid
HealthHealth
Ration BalancerRation Balancer
VitaminsVitamins
Tribute Essential K is a ration balancer with a low 12.5% NSC (sugar plus starch). Essential K provides a mix of organic and inorganic trace minerals, including organic selenium yeast.
Essential K GC Plus (Tribute)
JointsJoints
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Ration BalancerRation Balancer
Tribute Essential K GC Plus is a lower-inclusion ration balancer formulated with glucosamine, chondroitin sulfate, and MSM meant to support joint health.
Essential K Rebuild (Tribute)
Low NSC FeedsLow NSC Feeds
PerformancePerformance
Ration BalancerRation Balancer
RecoveryRecovery
Essential K Rebuild by Tribute is a low-starch, low-sugar pelleted ration balancer formulated for performance horses. Different from Essential K, it has added chromium and turmeric.
Essential K w/ Fly Control (Tribute)
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
Ration BalancerRation Balancer
VitaminsVitamins
Tribute Essential K with Fly Control is a low feeding-rate ration balancer with Diflubenzuron, which can regulate the emergence of common flies.
Everyday Gold Daily Electrolyte (TRM)
ElectrolyteElectrolyte
ExerciseExercise
HydrationHydration
RecoveryRecovery
Everyday Gold Daily Electrolyte is an electrolyte supplement formulated for performance horses to replace the minerals lost in sweat. Freshwater should always be available when using this supplement.
Ex Stress Elite (Peak Performance Nutrients)
CalmingCalming
Competition HorsesCompetition Horses
PerformancePerformance
StressStress
Ex Stress Elite by Peak Performance Nutrients is a supplement containing magnesium, B vitamins, and electrolytes. It is meant to help horses replace the nutrients they lose when in stressful situations.
Ex Stress Paste (Peak Performance Nutrients)
CalmingCalming
Competition HorsesCompetition Horses
PerformancePerformance
StressStress
Ex Stress Paste by Peak Performance Nutrients is a supplement containing magnesium and B vitamins. It is intended to help horses replace the nutrients they lose when in stressful situations such as competitions and trailering.
Ex Stress Powder (Peak Performance Nutrients)
CalmingCalming
Competition HorsesCompetition Horses
PerformancePerformance
StressStress
Ex Stress Powder by Peak Performance Nutrients is a supplement containing magnesium and B vitamins. It is meant to help horses replace the nutrients they lose when in stressful situations such as competitions and trailering.
Excel Equine 15 (Excel Equine Feeds)
BroodmareBroodmare
GrowthGrowth
NutritionNutrition
PerformancePerformance
Excel Equine 15 by Excel Equine Feeds is a textured feed intended for broodmares, foals, weanlings, yearlings and high performance horses.
EZ (Tribute)
CalmingCalming
ExerciseExercise
FatFat
FiberFiber
Tribute Equine EZ Pellets is a 20% fibre, 8% fat feed intended for hard keepers and mature horses with higher energy requirements. It is formulated with reduced sugar and starch content and provides a maximum 13.5% NSC.
Fiber Boost (Ark Nutrition)
FiberFiber
Low NSC FeedsLow NSC Feeds
Mineral BalanceMineral Balance
VitaminsVitamins
Ark Nutrition Fiber Boost is a concentrated fiber source with added vitamins and minerals. It has low sugar and starch content, suitable for metabolic horses.
Fohlengold BoneCare (St.Hippolyt)
Bone HealthBone Health
FoalFoal
GrowthGrowth
JointsJoints
Fohlengold BoneCare by St.Hippolyt is a pelleted supplement intended to support stable bone growth in foals and young horses.
ForeLyte Paste (Forefront Equine)
ElectrolyteElectrolyte
HydrationHydration
RecoveryRecovery
StaminaStamina
ForeLyte Paste is a paste supplement intended to replace lost electrolytes during sweating. It is ideal for horses in training programs or horses exposed to elevated temperatures.
ForeRunner Paste (Forefront Equine)
HydrationHydration
PerformancePerformance
StaminaStamina
StressStress
ForeRunner Paste is an electrolyte supplement. It is intended to prevent dehydration and support quick recovery after competition. It is ideal for performance horses.
Free Choice (Doctor’s Choice Supplements)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Free Choice by Doctor's Choice Supplements is a vitamin and mineral supplement intended for horses strictly on pasture or forage. It contains ingredients such as calcium carbonate, salt, and monocalcium phosphate.
GoMax (Farman)
MetabolismMetabolism
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
GoMax from Farnam is a liquid vitamin and mineral supplement fortified with iron. It contains yucca, cherry flavourings and cane molasses.
Grass Plus Vitamin & Mineral Block (BUCKEYE Nutrition)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Buckeye Grass Plus® Mineral & Vitamin Block is a free-choice mineral supplement intended for horses consuming grass forage. It contains inorganic minerals including calcium, phosphorus, magnesium and potassium.
Gro-Fit (Ark Nutrition)
BroodmareBroodmare
Complete FeedComplete Feed
GrowthGrowth
LactationLactation
Gro-Fit by Ark Nutrition is a complete pelleted feed intended for growing horses, pregnant mares, lactating mares, and working horses. It contains various ingredients such as alfalfa meal, soyhulls, and wheat.
Grow Colt (Farnam)
GrowthGrowth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Farnam Grow Colt growth and development supplement is a pelleted vitamin and mineral supplement intended for foals under one year of age.
Harmony (DePaolo Equine Concepts)
Amino AcidAmino Acid
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
Harmony from DePaolo Equine Concepts is a powdered supplement that aims to provide an even temperament in horses. It can also balance hormone levels and support a healthy endocrine system.
Hemogen Solution (Manna Pro)
Blood CellsBlood Cells
EnergyEnergy
StaminaStamina
VitaminsVitamins
Hemogen Solution by Manna Pro is an iron supplement with other minerals and B vitamins. Hemogen Solution from Manna Pro is intended to improve energy and stamina.
Hesta Mix Classic (St.Hippolyt)
Gut HealthGut Health
Hoof HealthHoof Health
Organic Trace MineralsOrganic Trace Minerals
Skin + HairSkin + Hair
Hesta Mix Classic by St.Hippolyt is a pelleted feed intended to support skin and coat health in larger breed horses.
Hesta Mix Muesli (St.Hippolyt)
Caloric EnergyCaloric Energy
Easy KeeperEasy Keeper
NutrientsNutrients
NutritionNutrition
Hesta Mix Muesli by St.Hippolyt is a supplement intended for horses in light work with lower feed requirements, and for larger breed horses such as Andalusians, Lusitanos, cold-blooded horses, Arabians, Irish cobs or Friesians.
High Step (Equi-lete)
Easy KeeperEasy Keeper
Hoof HealthHoof Health
ImmunityImmunity
Skin + HairSkin + Hair
High Step by Equi-lete is a vitamin and mineral supplement intended to support overall health in pleasure horses, easy keepers and non-performance horses.
High VAULTage (Equi-lete)
HealthHealth
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
High VAULTage by Equi-lete is a vitamin and mineral supplement intended to support health, performance and recovery in performance horses and hard keepers.
Hiland’s Big Sky Mineral (Hiland Supply Co. Ltd)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Hiland's Big Sky Mineral by Hiland Supply Co. Ltd is a mineral supplement intended to support overall health in all horse types.
Hoof Organic (Advanced Biological Concepts)
HealthHealth
Hoof HealthHoof Health
ImmunityImmunity
VitaminsVitamins
Hoof Organic from Advanced Biological Concepts is a pelleted hoof supplement for horses. Hoof Organic is fortified with trace minerals and biotin intended for hoof growth.
Hoof+ (Enviro Equine)
Gut HealthGut Health
HealthHealth
HindgutHindgut
Hoof HealthHoof Health
Hoof+ by Enviro Equine is a hoof supplement designed to promote hoof strength and growth while also supporting the hindgut microbiome in horses.
HoofStim (SportForce)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
HoofStim is an equine supplement intended to support hoof growth and development. It provides 25 mg of biotin per 1 ounce serving, in addition to amino acids, zinc, copper, magnesium, and vitamin B6.
Hubbard Horse Mineral (Hubbard Feeds)
Bone HealthBone Health
GrowthGrowth
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Hubbard Horse Mineral is a vitamin and mineral premix with a 1.2:1 calcium to phosphorus ratio designed to balance alfalfa-mixed forages. It provides organic trace minerals as well as vitamins needed to balance a forage-only diet or mixed grain ration.
Integrity Performance (Integrity Horse Feeds)
EnergyEnergy
ExerciseExercise
MuscleMuscle
PerformancePerformance
Integrity Performance is a high-calorie textured feed designed for adult horses in moderate to heavy work. It provides 10% fat and 8.7% starch.
Jump-Start Plus (Manna Pro)
Gut HealthGut Health
ImmunityImmunity
ProbioticProbiotic
StressStress
Jump-Start Plus is a digestive paste that supplies probiotics, sodium bicarbonate, vitamins, and minerals. It is intended to be used during times of stress such as transportation, illness, or competition.
Just Add Oats (Natural Horse Vet)
Mineral BalanceMineral Balance
NutritionNutrition
ProbioticProbiotic
VitaminsVitamins
Just Add Oats by Natural Horse Vet is a powdered supplement intended to provide the vitamins and minerals to complete grain mixes and help balance out mixed grass, legume and grass hay.
K Finish (Tribute)
FatFat
Mineral BalanceMineral Balance
VitaminsVitamins
Weight IssuesWeight Issues
Tribute K Finish is a 25% fat equine supplement formulated with a blend of soybean, rice bran, and flaxseed. It can be used as a top-dressing for weight gain or for horses that require additional calories.
Kalm N’ Fit (Tribute Equine)
Complete FeedComplete Feed
DigestionDigestion
FatFat
FiberFiber
Kalm 'N Fit® is a corn-free, high-fat, textured feed for exercising mature horses. It is formulated for horses consuming lower protein forages and contains steam-crimped grains to improve digestibility.
Kalm Performer (Tribute Equine)
EnergyEnergy
PerformancePerformance
ProteinProtein
Weight IssuesWeight Issues
Kalm Performer® is a corn-free, high-fat, textured feed with 24% NSC targeted to mature performance horses. It is formulated for horses consuming higher protein forages such as alfalfa hay.
Kalm Performer GC Plus (Tribute)
Complete FeedComplete Feed
JointsJoints
PerformancePerformance
RespiratoryRespiratory
Tribute Kalm Performer is a pelleted complete feed intended for mature horses on high protein forages like alfalfa hay. It is a corn-free formula with steam-crimped grains to support digestibility. It provides 24% NSC.
Kalm Ultra (Tribute Equine)
Complete FeedComplete Feed
ExerciseExercise
StressStress
Weight IssuesWeight Issues
Tribute Kalm Ultra® is a high-fat pelleted feed with 23.5% NSC targeted to adult horses in heavy work or hard keepers that need to gain weight. Kalm Ultra® provides energy from fat and fiber to support calm performance.
Kalm+ Wafer (Majesty’s)
Amino AcidAmino Acid
CalmingCalming
NutrientsNutrients
VitaminsVitamins
Kalm+ is intended to be used as a calming supplement for adult horses and ponies. This diet could be beneficial for horses subjected to frequent travelling or competitions.
Legacy 16% Mare & Foal Ration (CO-OP)
FoalFoal
GrowthGrowth
LactationLactation
MareMare
Legacy 16% Mare & Foal Ration is a higher-protein feed intended for broodmares and growing foals. These horses benefit from higher levels of amino acids in the diet.
Liquid 747 (Tuttle’s)
Amino AcidAmino Acid
Coat QualityCoat Quality
Mineral BalanceMineral Balance
VitaminsVitamins
Liquid 747 by Tuttle's is an apple flavoured liquid vitamin and mineral supplement. It contains trace minerals and amino acids to support growth and performance.
Low Starch Omega Plus (Equine Advantage)
Caloric EnergyCaloric Energy
FatFat
FiberFiber
NutritionNutrition
Low Starch Omega Plus is intended for horses that need moderate to significant calories added to their diet. This diet is suitable for horses with Insulin Resistance, Cushing's Disease, and PSSM due to the low NCS.
Luminance Fortified Equine Conditioning Supplement (Hallway Feeds)
Caloric EnergyCaloric Energy
Omega 3-6-9Omega 3-6-9
PerformancePerformance
Weight IssuesWeight Issues
Hallway Luminance is a fat supplement for horses that require additional body condition. It is formulated to add calories to the diet for performance horses and horses being prepared for sale.
Lunar Eclipse (Simple System Horse Feeds)
Competition HorsesCompetition Horses
IngredientIngredient
NutritionNutrition
StressStress
Lunar Eclipse is a powered equine supplement developed for horses who are stressed or temperamental. It is formulated with added Magnesium and B Vitamins.
MagnaGard Gastric Support Supplement (Eagle Equine)
DigestionDigestion
Gut HealthGut Health
HindgutHindgut
ImmunityImmunity
MagnaGard Gastric Support from Eagle Equine is a powdered equine supplement intended to prevent ulcers. MagnaGard Gastric Support is also a source of magnesium and trace minerals for horses.
Magnesium Sulfate (Epsom Salts)
ElectrolyteElectrolyte
Gut HealthGut Health
IngredientIngredient
MuscleMuscle
Magnesium sulfate is an inorganic source of the mineral magnesium. Epsom Salts can be used under veterinary guidance to promote gut motility.
Magnesium Sulfate Anhydrous
CalmingCalming
ElectrolyteElectrolyte
IngredientIngredient
MuscleMuscle
Magnesium Sulfate (epsom salts) is a form of magnesium that is not readily absorbed by horses. The anhydrous form does not contain water. Magnesium sulfate is not very palatable to horses and, if too much is fed, it can have a laxative effect.
Makor (St.Hippolyt)
CalmingCalming
PerformancePerformance
RecoveryRecovery
StressStress
Makor by St.Hippolyt is a supplement high in magnesium and Vitamin E intended to support horses in intense competition and training.
Mare Plus (Farnam)
BroodmareBroodmare
LactationLactation
Mineral BalanceMineral Balance
VitaminsVitamins
Farnam Mare Plus is a gestation and lactation supplement intended to provide nutrients required for gestating and lactating mares. It supplies vitamins, minerals and amino acids.

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