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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.
Mare’s Milk Plus (Buckeye)
EnergyEnergy
FoalFoal
NutritionNutrition
ProteinProtein
Mares Milk Plus is a powdered milk replacer for nursing, orphaned or rejected foals. It contains digestible, whey-based proteins to minimize digestive upset and is fully fortified.
Mellow Muscle (Sierra Gold)
CalmingCalming
Mineral BalanceMineral Balance
MuscleMuscle
VitaminsVitamins
Mellow Muscle by Sierra Gold is a powdered supplement for horses intended to aid horses suffering from PSSM. It contains vitamins, minerals, and amino acids which intend to support muscle growth.
Metaslim (Simple System Horse Feeds)
IngredientIngredient
Metabolic SyndromeMetabolic Syndrome
NutrientsNutrients
Weight IssuesWeight Issues
Metaslim is a pelleted equine feed designed for horses who have metabolic issues. It is a highly palatable feed suitable for overweight horses.
Moulee HM 13% Liberte (Nature Belisle)
Complete FeedComplete Feed
GrainsGrains
NutritionNutrition
PerformancePerformance
Moulee HM 13% Liberte is a textured feed intended for performance horses and those in heavy work. It contains 13% protein, 6.09% fat, and 7.86% fibre.
Moulee Jument 16% Liberte (Nature Belisle)
BroodmareBroodmare
Complete FeedComplete Feed
NutritionNutrition
ProteinProtein
Moulee Jument 16% Liberte is a cubed feed intended for broodmares. It contains 16% protein, 4.85% fat, and 8.35% fibre.
Moulee Poulain Liberte 17% (Nature Belisle)
Complete FeedComplete Feed
FoalFoal
GrowthGrowth
NutritionNutrition
Moulee Poulain Liberte 17% by Nature Belisle is intended for horses and ponies aged 0-2 years of age. This cubed feed contains 17% protein as its primary energy source.
Moulee Q-F 15% Liberte (Belisle)
EnergyEnergy
FatFat
FiberFiber
NutritionNutrition
Moulee Q-F 15% is a complete feed with 15% crude protein and 7% crude fat. It also contains vitamin E and selenium. This feed is intended for all horses and ponies.
Moulée Quali-Fibre (Nature Belisle)
FiberFiber
Omega 3-6-9Omega 3-6-9
ProbioticProbiotic
VitaminsVitamins
Moulee Quali-fibre is a feed intended for horses with higher energy demands, such as performance horses. It contains 15% protein, 7% fat and 23% fibre with added vitamin E and selenium.
Nutri-Calm Gel (Foran Equine)
CalmingCalming
Competition HorsesCompetition Horses
PerformancePerformance
StressStress
Nutri-Calm Gel from Foran Equine is intended for nervous horses, traveling, and competition. This supplement is meant to support calming behavior in horses and ponies.
Nutri-Calm Syrup (Foran Equine)
CalmingCalming
Competition HorsesCompetition Horses
PerformancePerformance
StressStress
Nutri-Calm Syrup from Foran Equine is intended for nervous horses. This supplement contains magnesium, B vitamins, and Tryptophan which are meant to promote calming behavior.
One’N Only (Wendlands)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
One'N Only by Wendlands is a total mixed ration formulated to replace traditional concentrates and supplements. It can also be fed as a hay extender to help meet forage needs.
Perform ‘N Win Electrolyte (BUCKEYE Nutrition) – [Discontinued]
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
PerformancePerformance
StaminaStamina
Perform 'N Win is a now-discontinued electrolyte formula sold by Buckeye Nutrition. Perform 'N Win was formulated to meet the needs of competitive endurance horses and to promote increased stamina.
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 Liquid (Formula 707)
Mineral BalanceMineral Balance
NutrientsNutrients
PerformancePerformance
VitaminsVitamins
Performance Liquid from Formula 707 is a liquid supplement containing vitamins and minerals. It is intended to provide energy and nutrients for performance horses.
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.
Perk-A-Lyte (Cox Vet Lab)
ElectrolyteElectrolyte
HydrationHydration
Mineral BalanceMineral Balance
StaminaStamina
Perk-A-Lyte is a electrolyte supplement intended to replenish electrolyte stores after exercise and competition.
Perktone (Cox Vet Lab)
Blood CellsBlood Cells
EnergyEnergy
Mineral BalanceMineral Balance
VitaminsVitamins
Perktone is a liquid iron supplement intended to help performance horses with their blood's ability to transport oxygen throughout the body. This may lead to improved performance.
Physique (Equi-lete)
Bone HealthBone Health
EnergyEnergy
HealthHealth
Mineral BalanceMineral Balance
UlcersUlcers
Physique by Equi-lete is a pelleted supplement intended to support bone and tissue health in all horse types.
Power Finish (Tribute)
Complete FeedComplete Feed
EnergyEnergy
ExerciseExercise
PerformancePerformance
Tribute Power Finish is a high-fat textured feed intended for adult horses in heavy training. It provides highly digestible energy sources to support the calorie requirements of racehorses. Power Finish contains high levels of protein (13% crude protein), fat (10% crude fat), and NSC (32%).
Power Up (Cox Vet Lab)
Competition HorsesCompetition Horses
MuscleMuscle
PerformancePerformance
RecoveryRecovery
Power Up from Cox Vet Lab is a liquid equine supplement containing a blend of Gamma Oryzanol and Creatine. Power Up is cherry flavoured to improve palatability.
Pre-Fuel Gel (Foran Equine)
Competition HorsesCompetition Horses
EnergyEnergy
MuscleMuscle
NutrientsNutrients
Pre-Fuel Gel from Foran Equine is intended for performance horses and ponies. This supplement is meant to provide extra nutrients and energy to the horses diet.
Precision (Ark Nutrition)
Amino AcidAmino Acid
FatFat
GrowthGrowth
ToplineTopline
Precision by Ark Nutrition is a pelleted feed that is low in sugar with a moderate starch level meant to ease digestion and is higher in soluble fiber levels to support hindgut function.
Prime Lyte (Prime Performance Nutrition)
ElectrolyteElectrolyte
ExerciseExercise
PerformancePerformance
RecoveryRecovery
Prime Lyte is a buffered electrolyte blend by Prime Performance Nutrition. It is intended to replace electrolytes lost in sweat.
Quench Electrolyte (HorseTech)
ElectrolyteElectrolyte
HydrationHydration
RecoveryRecovery
StressStress
Quench Electrolyte by HorseTech is an electrolyte containing no sugar, fillers or flavours. It is intended to replace electrolytes in horses under stress from heat, hard work or training.
Quitt (Farnam)
CalmingCalming
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Farnam Quitt is a pelleted supplement intended to stop wood chewing in horses. It contains vitamins, minerals and fatty acids.
Quitt Chew Stop Pellets (Farnam)
CalmingCalming
Mineral BalanceMineral Balance
ProteinProtein
VitaminsVitamins
Quitt is a supplement for horses meant to help them stop wood chewing. It provides vitamins, minerals, and fatty acids intended to meet a horse's nutritional requirements and prevent wood chewing behaviours.
Recharge (Doctor’s Choice Supplements)
ElectrolyteElectrolyte
ExerciseExercise
Mineral BalanceMineral Balance
RecoveryRecovery
Recharge by Doctor's Choice Supplements is an electrolyte supplement intended to replace minerals and vitamins after exercise and heat waves.
Red Cell (Iron Rich Supplement)
Blood CellsBlood Cells
CirculationCirculation
Mineral BalanceMineral Balance
NutrientsNutrients
Red Cell® is a liquid vitamin-iron-mineral supplement for horses that are iron deficient. Each serving provides 300 mg of chelated iron. It includes B-complex vitamins to help support immune health.
Repair Daily Formula (Red Hot Equine Aminos)
Amino AcidAmino Acid
MuscleMuscle
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Repair Daily Formula by Red Hot Equine Aminos is a powdered supplement formulated with amino acids, trace minerals, and electrolytes. It is specifically designed to support muscle recovery in horses.
RestorePRO Pellets (Horse Logic Pro)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
HealthHealth
HydrationHydration
RestorePRO Pellets from Horse Logic Pro is a pelleted electrolyte for horses. RestorePRO Pellets contain ingredients intended to support horses' mineral and hydration levels.
Senior GC Pelleted Feed (BUCKEYE Nutrition)-[Discontinued]
Complete FeedComplete Feed
HealthHealth
JointsJoints
SeniorSenior
Senior GC is a now-discontinued pelleted feed from Buckeye Nutrition targeted to older horses with functional teeth. Senior GC provided glucosamine, chondroitin, and MSM to support joint health.
Seniority GC Plus (Tribute Equine)
Complete FeedComplete Feed
JointsJoints
RespiratoryRespiratory
SeniorSenior
Tribute Seniority™ GC Plus is a textured, complete feed for mature horses that contains additional ingredients to support joint health. It is formulated with glucosamine, chondroitin sulfate, and MSM.
Solutions 12 Textured (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 12 Textured is a complete feed with 12% protein and 6% fat. It is formulated using corn, oats, barley, and wheat as energy sources. It also contains soybean as a protein source and soybean oil as a fat source.
Solutions 14 Textured (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 14 Textured is a complete feed containing 14% protein from soybean and alfalfa meal and 6% fat from soybean oil. It contains whole oats, cracked corn, wheat middling's, and molasses as energy sources.
Strategy (Ark Nutrition)
FatFat
HealthHealth
NutritionNutrition
ProteinProtein
Strategy by Ark Nutrition is an energy and protein supplement for horses. It is intended to support muscle development and meet fatty acid requirements from soybean meal, palm oil, flaxseed, and rice bran.
Stress Pak (Select The Best)
ElectrolyteElectrolyte
HydrationHydration
Mineral BalanceMineral Balance
StressStress
Stress Pak by Select The Best is a powdered electrolyte supplement that provides the vitamins, minerals, and electrolytes necessary to replenish what is lost in sweat. This electrolyte is sugar-free.
SU-PER Cell Builder Liquid (Gateway Products)
Blood CellsBlood Cells
CirculationCirculation
HealthHealth
VitaminsVitamins
SU-PER Cell Builder Liquid by Gateway Products is a supplement to support stamina, endurance, and blood cell health. It is a high-iron supplement that supports normal red blood cell production and helps promote healthy cells with high hemoglobin content.
SU-PER Lyte Paste (Gateway Products)
ElectrolyteElectrolyte
HydrationHydration
Mineral BalanceMineral Balance
RecoveryRecovery
SU-PER Lyte Paste is an electrolyte paste supplement meant to provide essential electrolytes and trace minerals that horses may lose during exercise or hot conditions. This supplement can aid in electrolytic balance and proper hydration.
SU-PER Lyte Powder (Gateway Products)
ElectrolyteElectrolyte
HydrationHydration
Mineral BalanceMineral Balance
RecoveryRecovery
SU-PER Lyte Powder by Gateway Products is an electrolyte paste supplement meant to provide essential electrolytes and trace minerals that horses may lose during exercise or hot conditions. This supplement can aid in electrolytic balance and proper hydration.
SU-PER StressEx Powder (Gateway Products)
CalmingCalming
ElectrolyteElectrolyte
RecoveryRecovery
StressStress
SU-PER StressEx Powder by Gateway Products is a supplement containing electrolytes that helps maintain a horse's normal body fluid levels. This supplement aids in supporting normal nerve and muscle function and helps prevent dehydration.
SUPREME™ 10 Pelleted Feed (BUCKEYE Nutrition)-[Discontinued]
Complete FeedComplete Feed
Gut HealthGut Health
HealthHealth
Ration BalancerRation Balancer
SUPREME™ 10 Pelleted Feed is a now-discontinued feed that provided 10% crude protein in a fortified grain mix. It was formulated to support the nutritional needs of mature horses.
SweatAgain (AniMed)
Amino AcidAmino Acid
ElectrolyteElectrolyte
Mineral BalanceMineral Balance
VitaminsVitamins
SweatAgain from AniMed is a powdered electrolyte supplement. It contains amino acids, vitamins, minerals and more, which all contribute to a horse's ability to sweat normally and maintain a healthy body temperature.
Synergize (Tribute)
FatFat
Gut HealthGut Health
Low NSC FeedsLow NSC Feeds
PerformancePerformance
Synergize by Tribute is a pelleted feed intended for hard-keepers and horses with a heavy workload that are sensitive to sugar and starch.
Synergy (Ark Nutrition)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Ark Nutrition Synergy is a concentrated mineral and vitamin premix containing 100% organic selenium and a blend of inorganic and organic trace minerals. It contains no molasses, fillers or artificial flavours.
ThriveFeed Horse Feed
ForageForage
Gut HealthGut Health
HealthHealth
NutrientsNutrients
ThriveFeed is a pelleted horse feed composed of alfalfa meal, timothy grass meal, sorghum, soybean meal, rice bran and kelp meal. It provides 15% protein, 2.5% fat and 20% fiber.
Tie Free 24 (Peak Performance Nutrients)
ElectrolyteElectrolyte
MuscleMuscle
PerformancePerformance
RecoveryRecovery
Tie Free 24 by Peak Performance Nutrients is a vitamin and mineral supplement that provides electrolytes to support horses prone to tying up. It contains vitamin E acetate, calcium carbonate, and sodium bicarbonate to help performance.
Tie Free TMC Paste (Peak Performance Nutrients)
ExerciseExercise
MuscleMuscle
RecoveryRecovery
StressStress
Tie Free TMC Paste is a sodium bicarbonate free electrolyte supplement that supports replenishment of glycogen stores, muscle recovery, and muscles prone to tying up. It contains potassium chloride, potassium carbonate, and magnesium sulphate.
Tie Free TMC Powder (Peak Performance Nutrients)
ExerciseExercise
GrowthGrowth
MuscleMuscle
RecoveryRecovery
Tie Free TMC Powder is a sodium bicarbonate free electrolyte supplement that supports replenishment of glycogen stores, muscle recovery, and muscles prone to tying up. It contains potassium chloride, potassium carbonate, and magnesium sulphate.
Tie-X + Calcium (Golden Horseshoe)
HealthHealth
MuscleMuscle
Organic Trace MineralsOrganic Trace Minerals
PerformancePerformance
Tie-X + Calcium by Golden Horseshoe is a powdered muscle supplement. It is formulated with vitamins and minerals such as calcium, magnesium, and thiamine.
Total Blood Fluids Muscle (Ramard)
Blood CellsBlood Cells
ElectrolyteElectrolyte
MuscleMuscle
PerformancePerformance
This supplement from Ramard is meant to assist in muscle recovery, health, and strength. It also provides energy and increases the amount of red blood cells in horses, while also providing electrolytes. This aids in performance, exercise, and health.

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