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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.
1:1 Free Choice (Dynamite)
HealthHealth
ImmunityImmunity
Mineral BalanceMineral Balance
VitaminsVitamins
1:1 Free Choice from Dynamite is a free choice vitamin and mineral supplement for horses. This supplement contains a ration of one part calcium to one part phosphorus, intended for horses consuming legume hay.
12% Maintain Horse Pellet (Minor Bros)
Easy KeeperEasy Keeper
HealthHealth
NutrientsNutrients
NutritionNutrition
12% Maintain Horse Pellet from Minor Bros is a pelleted feed containing 12% crude protein. This feed is intended for easy keepers or horses who are in light to moderate work.
12% Pleasure Horse (Sweet Country Feeds)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
GrainsGrains
NutritionNutrition
Sweet Country 12% Pleasure Horse is a textured feed intended for mature horses. It provides 12% crude protein in a grain-based formula containing corn, oats, wheat middlings and soybean meal.
12% Select Horse (Sweet Country Feeds)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
Organic Trace MineralsOrganic Trace Minerals
12% Select Horse by Sweet Country Feeds is a grain-based feed that provides 12% protein and 4% fat. It contains added vitamins, as well as inorganic and organic trace minerals.
12% Textured (Sweet Country Feeds)
Complete FeedComplete Feed
FlavorFlavor
HealthHealth
NutritionNutrition
12% Textured by Sweet Country Feeds is designed to be a palatable feed that provides 12% protein and 2.5% fat. It contains added vitamins and a blend of organic and inorganic minerals.
14% Senior Textured (Tribute)
Complete FeedComplete Feed
FatFat
NutritionNutrition
SeniorSenior
Tribute 14% Senior Textured is a complete feed for mature horses composed of steam-rolled oats, barley, dried beet pulp, extruded whole soybeans, and dehydrated alfalfa meal.
16-10 Liberty (Nature Belisle)
Mineral BalanceMineral Balance
NutrientsNutrients
NutritionNutrition
VitaminsVitamins
Liberty 16-10 is a vitamin/mineral supplement intended for horses at maintenance or in training, broodmares and growing foals. It contains organic selenium, 16% calcium, and 10% phosphorus.
3-In-1 Block (Kalmbach Feeds)
ElectrolyteElectrolyte
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
3-In-1 Block by Kalmbach Feeds is a source of salt, vitamins and trace minerals in block form. It can be used to supplement beef cattle and horses on pasture grass.
35% Horse Supplement (Kalmbach Feeds)
Amino AcidAmino Acid
MuscleMuscle
NutrientsNutrients
ProteinProtein
35% Horse Supplement by Kalmach Feeds is an equine supplement pellet that provides 35% protein, vitamins, and minerals. It can be mixed to create a complete ration for a wide range of horses.
ABC’s Fortified G. R. P. (Advanced Biological Concepts)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
ABC's Fortified G.R.P. by Advanced Biological Concepts is a supplement intended for horses and ponies of all ages and work levels. It contains 10% protein, 3% fat, and 17% fibre.
ABC’s Rush Creek 1:1 Mineral (Advanced Biological Concepts)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
ABC's Rush Creek 1:1 Mineral by Advance Biological Concepts is a free choice mineral supplement. It is intended for horses and ponies of all ages and work levels.
Accel Health and Wellness Formula (Vita Flex)
HealthHealth
Mineral BalanceMineral Balance
MuscleMuscle
VitaminsVitamins
Accel Health and Wellness Formula is a vitamin and mineral supplement for horses. It contains both organic and inorganic trace minerals.
Accel Lifetime (Vita Flex)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Accel Lifetime is a vitamin and mineral supplement providing 18% crude protein. It contains a mix of organic and inorganic trace minerals.
AlfaMax RX (Alfamax Feed)
Complete FeedComplete Feed
DigestionDigestion
HealthHealth
Low NSC FeedsLow NSC Feeds
AlfaMax RX from Alfamax Feed is a complete pelleted feed. AlfaMax RX contains no soybean meal & is intended for horses' requiring a low NSC content (starch + sugars).
AniDex (AniMed)
ElectrolyteElectrolyte
FlavorFlavor
Mineral BalanceMineral Balance
NutrientsNutrients
AniDex from AniMed is meant to provide additional salts and minerals to achieve electrolyte balance. It targets hard-working horses and comes in three flavours: apple, cherry, and orange.
Apple Electrolyte (Kauffman’s)
ElectrolyteElectrolyte
ExerciseExercise
HydrationHydration
RecoveryRecovery
Apple Electrolyte from Kauffman's is a powdered electrolyte for horses. This supplement contains water-soluble ingredients with an added apple flavour. Apple Electrolyte is intended to encourage hydration.
Apple Hi-Drate Powder (Equine America)
ElectrolyteElectrolyte
HydrationHydration
Mineral BalanceMineral Balance
PerformancePerformance
Apple Hi-Drate is a supplement for horses that is intended to support hydration and provide electrolytes. It contains minerals and is meant for working horses.
Apple-A-Day Electrolyte (Finish Line Horse Products)
ElectrolyteElectrolyte
HydrationHydration
RecoveryRecovery
StaminaStamina
Apple-A-Day is a sugar-free electrolyte supplement formulated with calcium, salt, potassium, magnesium, zinc, and copper. Electrolytes support mineral balance, hydration and exercise recovery.
Aqua-Aide (Baileys Horse Feeds)
ElectrolyteElectrolyte
HydrationHydration
Mineral BalanceMineral Balance
RecoveryRecovery
Aqua-Aide by Baileys Horse Feeds is an electrolyte supplement for all horses in work, especially those who sweat in training and competition. This supplement contains sodium chloride, potassium sulfate, and magnesium sulfate.
Artoa Pellets (Ametza)
FiberFiber
ForageForage
GrainsGrains
PerformancePerformance
Artoa Pellets by Ametza is a pelleted feed that provides energy through sources such as alfalfa hay and cracked corn. It contains a low grain level to minimize a variety of metabolic issues.
B.C.A.A Complex Powder (Peak Performance Nutrients)
Amino AcidAmino Acid
MuscleMuscle
PerformancePerformance
RecoveryRecovery
B.C.A.A Complex Powder is a branched-chain amino acid supplement for horses containing L-Valine, L-Leucine, and L-Isoleucine. This product supports muscle metabolism and is intended for performance horses.
BeCalm (Enviro Equine)
CalmingCalming
DigestionDigestion
Gut HealthGut Health
PerformancePerformance
BeCalm by Enviro Equine is a supplement intended to promote calmness and focus by supporting the gut. It is designed to support horses during travel, training, and competition.
BioMAX Plus (Sierra Gold)
Amino AcidAmino Acid
JointsJoints
Mineral BalanceMineral Balance
RecoveryRecovery
BioMAX Plus from Sierra Gold is a supplement that contains glucosamine and chondroitin. It is intended to support joint health, and recovery from injuries or competition.
Boredom Buster (Equi-lete)
Mineral BalanceMineral Balance
NutrientsNutrients
NutritionNutrition
VitaminsVitamins
Boredom Buster by Equi-lete is a hanging treat containing vitamins and minerals. It is intended for stalled horses experiencing boredom.
Broodmare & Growth (Lifeline)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Lifeline Broodmare & Growth Horse Feed is a textured feed intended for pregnant mares, foals, weanlings and yearlings.
Chelates Plus (Doctor’s Choice Supplements)
HealthHealth
NutritionNutrition
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Chelates Plus is a supplement intended to provide greater nutrient absorbability. It is designed growing, mature, and breeding horses.
Chelator Minerals (Equi-Boss Performance)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Chelator Minerals from Equi-Boss Performance is a complete mineral and vitamin supplement that is intended to contribute to overall health.
Chevinal (Foran Equine)
Competition HorsesCompetition Horses
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Chevinal from Foran Equine is a liquid supplement that is intended for all horses and ponies at any work level but specifically performance horses. This supplement is meant to balance nutritional requirements.
CM 16-10 Liberte (Nature Belisle)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
CM 16-10 Liberte by Nature Belisle is a mineral supplement intended for growing horses, horses at maintenance or in light work, and broodmares. It contains natural botanical extracts which can act as an insect repellent.
Complete Horse Pellets w/ Roughage (Bartlett Milling) [Discontinued]
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
VitaminsVitamins
Bartlett Complete Horse Pellets with Roughage is a 12% protein and 2.5% fat feed formulated for pleasure horses. Calories are provided from wheat middlings, alfalfa meal, soybean hulls, and ground corn.
Cool Command Senior Horse (Hubbard Feeds)
Coat QualityCoat Quality
DigestionDigestion
JointsJoints
SeniorSenior
Cool Command Senior Horse by Hubbard is a higher fat complete feed intended for senior horses with dental issues or joint health concerns. It contains 14% protein and 8% fat, with added MSM, chondroitin sulfate and glucosamine.
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.
Double Play (Equi-lete)
Bone HealthBone Health
Gut HealthGut Health
ImmunityImmunity
PerformancePerformance
Double Play by Equi-lete is a vitamin and mineral supplement intended to support gastric health, performance, and the growth of bone and cartilage in performance horses.
DuraLyte (Durvet)
ElectrolyteElectrolyte
Mineral BalanceMineral Balance
PerformancePerformance
RecoveryRecovery
DuraLyte by Durvet is a powdered electrolyte supplement available in 3 flavours (Apple, cherry and tropical fruit) and intended to maintain electrolyte balance in horses.
Duralyte-R (Hestevard)
ElectrolyteElectrolyte
Mineral BalanceMineral Balance
MuscleMuscle
NutrientsNutrients
Duralyte-R by Hestevard is a powdered electrolyte supplement intended for all horse and pony types.
Dynamite (Dynamite)
HealthHealth
Hoof HealthHoof Health
NutrientsNutrients
VitaminsVitamins
Dynamite by Dynamite is a supplement containing high amounts of selenium (44.4 ppm), it is intended to support overall health in all performance horses.
Easy Boy (Dynamite)
CalmingCalming
Competition HorsesCompetition Horses
HealthHealth
StressStress
Easy Boy is a calming supplement for horses from Dynamite. This supplement contains chelated magnesium and B-vitamins, intended to decrease nervous behaviour in horses.
Eberglo Liquid (Nature’s Way)
HealthHealth
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Eberglo by Nature's Wave is a liquid vitamin and mineral supplement for mature horses. It contains water-soluble and fat-soluble vitamins as well as inorganic trace minerals.
Electro Dex (Horse Health Products)
ElectrolyteElectrolyte
FlavorFlavor
Mineral BalanceMineral Balance
PerformancePerformance
Electro Dex is an equine electrolyte supplement that is meant to help supply electrolytes for horses in training or performance. It is also intended to assist with horses that are stressed and can support mineral balance.
Electrolast (DuMor)
ElectrolyteElectrolyte
HydrationHydration
Mineral BalanceMineral Balance
PerformancePerformance
Electrolast by DuMor is a powdered form of electrolyte supplement. Electrolyte salts may be lost by sweat when exercising, which is important to ensure electrolyte levels are balanced following exercise.
Electrolyte Gold (TRM)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
HydrationHydration
PerformancePerformance
Electrolyte Gold from TRM is an electrolyte for horses to compensate for electrolyte loss caused by heavy levels of exercise. Electrolyte Gold is a balanced electrolyte containing essential electrolytes and vitamins.
Electrolytes (Dodson & Horrell)
ElectrolyteElectrolyte
ExerciseExercise
HydrationHydration
PerformancePerformance
Electrolytes by Dodson & Horrell is a powdered supplement intended to replenish nutrient losses during heavy sweating and work for horses and ponies. This supplement is intended for horses and ponies in heavy work, in hot climates, or during travel.
Endurolytes (Herbs for Horses)
ElectrolyteElectrolyte
HydrationHydration
RecoveryRecovery
StaminaStamina
Endurolytes is an equine electrolyte supplement that contains potassium, sodium and chloride to replenish minerals lost in sweat. Electrolytes help to promote hydration in exercising horses.
Enhance 0.5 (Technique)
Complete FeedComplete Feed
HealthHealth
NutrientsNutrients
NutritionNutrition
Enhance 0.5 by Technique is a non-soy pelleted feed intended to meet the nutritional needs of all horse types.
Equi-Base Grass Pellets (Uckele)
HealthHealth
MetabolismMetabolism
NutrientsNutrients
Ration BalancerRation Balancer
Equi-Base Grass Pellet is a base mineral and vitamin supplement designed to balance diets based on grass hay/forage or a 50/50 alfalfa grass forage.
Equi-Base Senior (Uckele)
HealthHealth
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
Equi-Base Senior is a powdered vitamin, mineral and amino acid supplement formulated for senior horses. It contains ingredients which can support hoof, coat, immune and digestive function.
Equi-VM (Uckele)
HealthHealth
NutrientsNutrients
ProbioticProbiotic
Ration BalancerRation Balancer
Equi-VM is a powdered vitamin and trace mineral supplement from Uckele Health & Nutrition. It also contains probiotics and digestive enzymes.
EquiBalance (Enviro Equine)
Amino AcidAmino Acid
NutrientsNutrients
VitaminsVitamins
EquiBalance by Enviro Equine is a liquid vitamin and mineral supplement enriched with added lysine and biotin.
Equicell-R – Liquid Flavoured Vitamin-Mineral Supplement
DentalDental
HealthHealth
Ration BalancerRation Balancer
VitaminsVitamins
Pharm-Vet Equicell-R is a liquid mineral and vitamin supplement for horses. It contains added iron and is designed to provide nutrients that may be lacking in the equine diet.
EquiMin Loose Mineral (Nutrena)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
EquiMin Loose Mineral is a powdered mineral and vitamin supplement intended as a top-dressing for horses on a forage-only feeding program. This powdered mineral is designed to support immune response and health and coat health.

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