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Magnesium - Feed Ingredient

Magnesium is an essential mineral required for numerous physiological functions in horses. It plays a critical role in muscle contraction, nerve transmission, enzyme activity, and energy metabolism. As a macromineral, magnesium is necessary for maintaining normal neuromuscular function and supporting overall metabolic processes.

In equine nutrition, magnesium is commonly included in feed formulations and supplements to ensure adequate dietary intake. Deficiency in magnesium can lead to symptoms such as nervousness, muscle tremors, and poor coordination. While magnesium is naturally present in forages, supplementation may be necessary for horses with increased needs. Common supplemental sources include magnesium oxide, magnesium sulfate, and magnesium carbonate, each varying in bioavailability and digestibility

The following equine feeds, supplements and products contain Magnesium 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.
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.
Visceral+ (Mad Barn)
DigestionDigestion
Gut HealthGut Health
ImmunityImmunity
ProbioticProbiotic
UlcersUlcers
YeastYeast
Visceral+ by Mad Barn is a pelleted supplement to be used for horses with gastric health concerns. It is designed to maintain stomach and hindgut health and to support the immune system.
Ulca Fiber (Spillers Feeds)
FatFat
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
PerformancePerformance
UlcersUlcers
Ulca Fiber from Spillers Feed is a low NSC, high fat, and high protein feed. This feed is intended to be fed to performance horses prone to ulcers.
ULS-Gard Pellets (Equine America)
DigestionDigestion
Gut HealthGut Health
NutrientsNutrients
ProbioticProbiotic
ULS-Gard Pellets from Equine America is a stomach and gastrointestinal tract supplement. It is meant to support normal pH, proper function and contains pro- and prebiotics.
Ulsus (Peak Performance Nutrients)
DigestionDigestion
Gut HealthGut Health
NutrientsNutrients
UlcersUlcers
Ulsus by Peak Performance Nutrients is a powdered gut supplement designed for horses with low hay intake, stall bound and fed processed feeds. It intends to support normal acid production and mucus production.
Ultimate (Doctor’s Choice Supplements)
Amino AcidAmino Acid
Metabolic SyndromeMetabolic Syndrome
Omega 3-6-9Omega 3-6-9
Ration BalancerRation Balancer
Ultimate by Doctor's Choice Supplements is a ration balancer intended for horses on pasture of forage. It contains high levels of calcium, thiamine and the first limiting amino acid lysine.
Ultimate (Greenline)
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
Greenline Ultimate is an equine vitamin, trace mineral, and amino acid supplement intended for everyday use. It provides Vitamin A, Vitamin D3, Pantothenic Acid, Folic Acid, Thiamine (B1), Vitamin B12, Choline, Cobalt, Vitamin E, Riboflavin (B2), Niacin, Pyridoxine, Biotin, and Iron.
Ultium Gastric Care (Purina)
Competition HorsesCompetition Horses
Gut HealthGut Health
StressStress
UlcersUlcers
Purina® Ultium® Gastric Care is a concentrate feed intended for performance horses to support gastric and hindgut health. It provides digestible fibres from beet pulp, alfalfa and soy hulls.
Ultium Growth Formula (Purina)
BroodmareBroodmare
Complete FeedComplete Feed
GrowthGrowth
LactationLactation
Purina Ultium® Growth Formula is a concentrate feed intended for breeding and growing horses. It provides 9.5% fat with added amino acids to support development.
Ultium® Competition Horse Formula (Purina Mills)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Ultium Competition Horse Formula is a pelleted horse feed designed to support horses in competition. It is a high-fat, high-fibre ration that contains 12% protein.
Ultra Complete (Tribute)
EnergyEnergy
FatFat
PerformancePerformance
Weight IssuesWeight Issues
Ultra Complete is a high-fat and fibre textured feed formulated for adult horses in heavy work, such as racehorses in training. It is made with beet pulp, molasses, whole oats and soybeans.
Ultra GH (Tribute)
FatFat
Feed EfficiencyFeed Efficiency
FiberFiber
Gut HealthGut Health
Tribute Ultra GH is a complete pelleted feed intended to support gastrointestinal health in performance horses. It contains added microencapsulated dry yeast, direct-fed microbials, organic and inorganic trace minerals. It provides 8% crude fat and 21.5% NSC.
Ultra Mate (Elk Grove Milling)
Competition HorsesCompetition Horses
EnergyEnergy
JointsJoints
Weight IssuesWeight Issues
Ultra Mate by Elk Grove Milling is a corn based supplement intended to provide extra energy for competition horses, hard keepers, stallions and lactating mares.
UltraCruz Equine Advanced Joint Supplement (Santa Cruz Animal Health)
GrowthGrowth
JointsJoints
PerformancePerformance
SeniorSenior
UltraCruz Equine Advanced Joint Supplement is a pelleted joint supplement containing glucosamine, MSM, chondroitin sulfate, and hyaluronic acid. It has added vitamins and minerals as well as molasses for flavouring.
UltraCruz Equine Calming Supplement (Paste) (Santa Cruz Animal Health)
Amino AcidAmino Acid
CalmingCalming
NutrientsNutrients
VitaminsVitamins
UltraCruz Equine Calming Supplement by Santa Cruz Animal Health is formulated to encourage relaxation in horses that are tense or anxious. The recommended dose is two syringes of paste per day. This supplement contains several B-vitamins, along with magnesium, calcium and the amino acid theanine.
UltraCruz Equine Calming Supplement (Pellets) (Santa Cruz Animal Health)
CalmingCalming
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
UltraCruz Equine Calming Supplement is intended to be fed to nervous or stressed horses, to encourage focus and relaxation. It contains calcium, magnesium, theanine (an amino acid), and several B-vitamins. The pelleted version also contains rice bran and flaxseed, and is intended to be fed at 120 grams per day.
UltraCruz Equine Electrolyte (paste) (Santa Cruz Animal Health)
ElectrolyteElectrolyte
HydrationHydration
PerformancePerformance
RecoveryRecovery
UltraCruz Equine Electrolyte Paste is an oral supplement designed to replace minerals that horses lose in sweat while exercises. It provides sodium, magnesium, calcium and trace minerals in a glycerin-based paste.
UltraCruz Equine Electrolyte (powder) (Santa Cruz Animal Health)
ElectrolyteElectrolyte
ExerciseExercise
HydrationHydration
RecoveryRecovery
UltraCruz Equine Electrolyte is a powdered supplement designed for performance and working horses to replace the electrolyte minerals lost in sweat. It contains sodium, magnesium, calcium, and trace minerals.
UltraCruz Equine Electrolyte Plus (Santa Cruz Animal Health)
ElectrolyteElectrolyte
ExerciseExercise
HydrationHydration
RecoveryRecovery
UltraCruz Equine Electrolyte Plus is a pelleted supplement for exercising horses. This flax-based pellet contains salt, calcium, potassium and magnesium to replace electrolytes lost in sweat.
UltraCruz Equine Iron Charge Plus (Santa Cruz Animal Health)
ExerciseExercise
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
UltraCruz Equine Iron Charge Plus is a pelleted iron supplement for horses. It contains ferrous gluconate as well as other vitamins and minerals. Most horses exceed iron requirements in the diet and do not need to be supplemented.
UltraCruz Equine Joint Supplement (Santa Cruz Animal Health)
GrowthGrowth
JointsJoints
PerformancePerformance
SeniorSenior
UltraCruz Equine Joint Supplement is a soy-free joint formula for horses. It contains chondroitin sulfate, glucosamine, hyaluronic acid, and MSM. This supplement is designed to support joint, tendon, and ligament health.
UltraCruz Equine Trace Mineral (Santa Cruz Animal Health)
HealthHealth
Mineral BalanceMineral Balance
Omega 3-6-9Omega 3-6-9
VitaminsVitamins
UltraCruz Equine Trace Mineral is a pelleted mineral supplement for horses. It contains 14% protein and supplies several minerals including selenium, copper, zinc, and manganese.
UltraCruz Equine Wellness Performance Supplement (Santa Cruz Animal Health)
HealthHealth
Mineral BalanceMineral Balance
Omega 3-6-9Omega 3-6-9
VitaminsVitamins
UltraCruz Equine Wellness Performance Supplement is formulated to supplement vitamins and minerals, antioxidants, and fatty acids to the horse’s diet. This includes zinc, copper, and Vitamin E. It supplies 2 mg of biotin per serving (136 g).
Ultramin (Equis Feed)
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
YeastYeast
Ultramin by Equis Feed is a free-choice vitamin-mineral supplement for horses that can also be used to top-dress rations. It is formulated with organic minerals, biotin, yeast, and calcium carbonate.
UN-LOCK Race Performance Powder (BRL Equine)
Amino AcidAmino Acid
ElectrolyteElectrolyte
ExerciseExercise
PerformancePerformance
UN-LOCK Equine Race Performance Powder is a muscle supplement containing branched-chain amino acids, vitamins, and electrolytes. It is a source of the amino acids L-valine, L-leucine, L-isoleucine, l-glutamine, L-arginine, and L-carnitine.
Unbeetable Balance (Unbeetable Feeds)
FiberFiber
Grain FreeGrain Free
Mineral BalanceMineral Balance
VitaminsVitamins
Unbeetable Balance is a ration balancer from Unbeetable Feeds. It is a grain-free, pelleted formulation intended for horses that require controlled calorie intake.
Uniblock (Dodson & Horrell)
Mineral BalanceMineral Balance
NutrientsNutrients
NutritionNutrition
VitaminsVitamins
Uniblock by Dodson & Horrell is a vitamin and mineral block for horses and ponies. This block is palatable and helps to support vitamin and mineral balance for horses that may not have access to pasture.
Vegetable Herbal Minerals (St.Hippolyt)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Vegetable Herbal Minerals by St.Hippolyt is a pelleted supplemented intended for pregnant, lactating and young horses.
Veloci-T Max (Purina)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Purina Veloci‑T Max is a textured feed intended for racehorses, breeding stallions, early gestating mares, and yearlings. . It is formulated with higher fat and starch levels to meet the high energy demands of performance horses.
Velocity (Ark Nutrition)
Complete FeedComplete Feed
ExerciseExercise
NutritionNutrition
ProteinProtein
Velocity by Ark Nutrition is a pelleted feed intended for horses in moderate to heavy work. It contains a blend of essential amino acids and fatty acids meant to support muscle development and improve muscle recovery.
Vermont Blend (Custom Equine Nutrition)
Amino AcidAmino Acid
DigestionDigestion
Mineral BalanceMineral Balance
YeastYeast
Vermont Blend by Custom Equine Nutrition is a supplement intended to balance out the deficiencies when a horse is solely fed grass hay. It contains amino acids, biotin and minerals such as copper and magnesium.
Vermont Blend No Selenium (Custom Equine Nutrition)
Amino AcidAmino Acid
Hoof HealthHoof Health
Mineral BalanceMineral Balance
YeastYeast
Vermont Blend No Selenium is a mineral and vitamin supplement containing no added selenium for horses with diets that already contain adequate amounts of this trace mineral.
Vermont Blend Pellets (Custom Equine Nutrition)
Amino AcidAmino Acid
Mineral BalanceMineral Balance
VitaminsVitamins
YeastYeast
Vermont Blend by Custom Equine Nutrition is a pelleted supplement intended to be fed to horses solely on grass hay. It contains amino acids, biotin and minerals such as copper and magnesium.
Vermont Blend Pro (Custom Equine Nutrition)
Gut HealthGut Health
Hoof HealthHoof Health
Organic Trace MineralsOrganic Trace Minerals
Ration BalancerRation Balancer
Vermont Blend Pro is a forage balancer and hoof supplement with added yeast cultures. It uses organic sources of copper and zinc. It has a lower feeding rate than the original Vermont Blend.
Vermont Blend Pro No Selenium (Custom Equine Nutrition)
Amino AcidAmino Acid
Gut HealthGut Health
Hoof HealthHoof Health
Ration BalancerRation Balancer
Vermont Blend Pro No Selenium by Custom Equine Nutrition is a supplement containing no added selenium intended for horses with diets that already contain adequate amounts of this trace mineral.
Veteran Supplement (NAF Equine)
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
YeastYeast
Veteran Supplement from NAF Equine is intended for senior horses and ponies. This supplement is meant to support digestive health and provide micronutrient that are essential for overall health.
Via-Calm (AniMed)
CalmingCalming
Mineral BalanceMineral Balance
PerformancePerformance
StressStress
AniMed's Vita-Calm is a supplement that is meant to reduce stress and provides vitamins, minerals, and amino acids. It can help calm horses, especially before events which may cause nervousness.
Victoria Racer’s Edge (Thomas Moore Feed)
EnergyEnergy
FatFat
NutrientsNutrients
PerformancePerformance
Victoria Racer's Edge from Thomas Moore Feed is a performance feed that is high in energy and is meant to be fed alongside forage. It contains vitamins and minerals and is intended to support body condition.
Victory! (Seminole)
FatFat
Feed EfficiencyFeed Efficiency
PerformancePerformance
StaminaStamina
Seminole Victory!™ is a beet pulp-based textured feed containing oats, barley and stabilized rice bran. It contains 29% NSC and is targetted to mature performance horses.
Vintage Sweet (Blue Seal) – [Discontinued]
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
NutritionNutrition
Weight IssuesWeight Issues
Vintage Sweet by Blue Seal is a now-discontinued feed with lower-protein, high-fat extruded feed formulated for working horses. It contained 12% crude protein and 8% fat, with energy supplied by cracked corn, oats, wheat, molasses, and oil.
Vita Plus (Farnam)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Farnam Vita Plus is a pelleted vitamin and mineral supplement for horses. It is designed to provide organic and inorganic trace minerals.
vitaFerrin (NAF Equine)
Mineral BalanceMineral Balance
NutrientsNutrients
PerformancePerformance
VitaminsVitamins
vitaFerrin from NAF Equine is intended for all horses and ponies at any level of work. This supplement is meant to support daily vitamin and mineral intake.
Vital 33 (Menuerie Benjamin)
HealthHealth
Organic Trace MineralsOrganic Trace Minerals
ProteinProtein
VitaminsVitamins
Vital 33 by Meunerie Benjamin is a high-protein, high-energy equine supplement formulated to support topline development and improve overall body condition. This supplement can be fed on its own or alongside a complete feed.
Vital Glo (Meunerie Benjamin)
Gut HealthGut Health
JointsJoints
Mineral BalanceMineral Balance
VitaminsVitamins
Vital Glo from Meunerie Benjamin is a cubed supplement containing vitamins and minerals. It is meant to support growing, performance or reproductive horses. It is also intended to assist with gut, joint, and hoof health.
Vital Muesli (Dodson & Horrell)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
GrainsGrains
PerformancePerformance
Vital Muesli is a high starch feed designed for racehorses in full training. This feed includes the elevated protein and fat levels required to sustain the heavy workload and the vitamins and minerals necessary for proper nutrient absorption.
Vitalize Equine Free Choice (BioZyme)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Vitalize Equine Free Choice by BioZyme is a vitamin and mineral supplement that supports digestion, nutrient absorption, and hindgut support. This feed additive is for horses on pasture and includes a prebiotic that aids with digestion.
Vitalize Equine High Performance (Biozyme)
Gut HealthGut Health
Mineral BalanceMineral Balance
PrebioticPrebiotic
VitaminsVitamins
Vitalize Equine High Performance by Biozyme is a pelleted supplement containing vitamins and minerals, it is intended for performance horses.
Vitalize Equine Vitamin & Mineral Supplement (Biozyme)
DigestionDigestion
Mineral BalanceMineral Balance
PrebioticPrebiotic
VitaminsVitamins
Vitalize Equine Vitamin and Mineral Supplement by Biozyme is a powdered vitamin and mineral supplement intended to support nutritional and digestive health in horses.
Vitamin E+ (Equine Choice)
HealthHealth
ImmunityImmunity
RecoveryRecovery
VitaminsVitamins
Vitamin E+ by Equine Choice is a highly concentrated pellet form of Vitamin E. Each 10g scoop contains 2,500 IU of natural Vitamin E.
Vitamin Gold (Dumor)
ImmunityImmunity
Mineral BalanceMineral Balance
VitaminsVitamins
YeastYeast
DuMOR Vitamin Gold is a pelleted mineral and vitamin supplement intended for all classes of horses and ponies. It is formulated to supplement diets containing poor quality forage.
Vitamins & Electrolyte Concentrate (Durvet)
ElectrolyteElectrolyte
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Vitamins & Electrolytes Concentrate by Durvet is a water soluble premix intended to be used for animals when feed intake is inadequate. This premix can be used for horses, cattle, goats, sheep, swine and poultry of all classes.
Vitamins & Electrolyte Plus (AgriLabs/ProLabs)
ElectrolyteElectrolyte
ExerciseExercise
HydrationHydration
VitaminsVitamins
AgriLabs Vitamins & Electrolyte Plus is a water-soluble powder supplement that provides vitamins, electrolytes and acidifiers for livestock animals and poultry. It is formulated for use during periods of stress or reduced feed intake.

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