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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.
Heiro (Equine Medical and Surgical Associates)
HealthHealth
HerbHerb
Hoof HealthHoof Health
ImmunityImmunity
Heiro from Equine Medical and Surgical Associates is a natural supplement for horses suffering from hoof soreness. Heiro contains fenugreek, cinnamon, peppermint and milk thistle intended to help horses with sore hooves.
Heiro Insulin Resistance Supplement
HerbHerb
Hoof HealthHoof Health
MetabolismMetabolism
Metabolic SyndromeMetabolic Syndrome
Heiro Insulin Resistance Supplement is a blend of herbs, vitamins, and minerals designed to support horses with metabolic issues. It contains added vitamin E and magnesium.
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.
Hi Fibre Horse and Pony Cube (Hilight)
EnergyEnergy
FiberFiber
ForageForage
NutritionNutrition
Hilight Hi Fibre Horse and Pony Cubes is a cubed feed formulated for horses that are idle or in light work. Hi Fibre Cubes contain 8.75% protein, 2.75% fat, 18% fibre and 15% starch.
Hi Oil Racehorse Cooked Mix (Red Mills)
Competition HorsesCompetition Horses
NutritionNutrition
RecoveryRecovery
StaminaStamina
Hi Oil Racehorse Cooked Mix from Red Mills is intended for performance racehorses in full training, horses requiring extra conditioning, and horses working in challenging climates. This mix is meant to provide fast-release energy for optimal performance and stamina.
High Cal (Pryde’s EasiFeed)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
Ration BalancerRation Balancer
High Cal by Pryde's EasiFeed is a high calcium pelleted balancer intended for horses grazing on high oxalate pastures and are at risk for calcium deficiency.
High Endurance (Cox Vet Lab)
Amino AcidAmino Acid
PerformancePerformance
RecoveryRecovery
StaminaStamina
High Endurance is a supplement intended to be given before and after an event to help replace vitamins, minerals, and amino acids lost during performance.
High Impact (HorseLogic)
Hoof HealthHoof Health
JointsJoints
MuscleMuscle
PerformancePerformance
High Impact from HorseLogic is a hoof and joint supplement. High Impact contains amino acids and biotin for hoof health, plus MSM, glucosamine, collagen, and chondroitin for joint health.
High Octane Alleviate (Purina)
DigestionDigestion
Gut HealthGut Health
HindgutHindgut
NutrientsNutrients
High Octane Alleviate by purina is a pelleted gastric and ruminal support supplement. It is intended to support optimal pH in the digestive systems of animals.
High Point Pellets (HorseTech)
Gut HealthGut Health
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
High Point Pellets by HorseTech is a pelleted vitamin and mineral supplement formulated to balance forage-based diets and support overall health. It also contains added prebiotics to promote optimal digestive function.
High Point-Alfalfa Hay (HorseTech)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
High Point- Alfalfa from HorseTech is a vitamin and mineral supplement which is designed to be fed in alfalfa-based diets. The 3-ounce feeding rate provides phosphorus and essential vitamins as well as trace minerals.
High Point-Grass/Mixed Hay (HorseTech)
HealthHealth
ProbioticProbiotic
Ration BalancerRation Balancer
VitaminsVitamins
High Point-Grass/Mixed Hay is a vitamin-mineral supplement formulated for horses consuming grass or mixed hay diets. This supplement provides a higher calcium-phosphorous ratio.
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.
High-Fat Sweet 10 (Manna Pro) [Discontinued]
Complete FeedComplete Feed
FlavorFlavor
HealthHealth
NutritionNutrition
High-Fat Sweet 10 from Manna Pro is designed for active pleasure horses, broodmares, and stallions. It contains 10% crude protein, 5% crude fat, 10% crude fibre, and uses inorganic trace minerals.
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.
Hippovit Electrolytes (St.Hippolyt)
Competition HorsesCompetition Horses
Mineral BalanceMineral Balance
PerformancePerformance
RecoveryRecovery
Hippovit Electrolytes by St.Hippolyt is an electrolyte supplement intended for horses who have experienced mineral loss through heavy sweating.
HistAll H (AniMed)
HealthHealth
ImmunityImmunity
NutrientsNutrients
VitaminsVitamins
HistAll H from AniMed is a supplement meant to help horses suffering from seasonal allergies, to support normal histamine levels and a healthy immune system. It also claims to help combat environmental irritants and pollutants.
Hoof + Hair (Bluebonnet Feeds)
Coat QualityCoat Quality
Hoof HealthHoof Health
NutrientsNutrients
Skin + HairSkin + Hair
Hoof + Hair by Bluebonnet Feeds is a vitamin and mineral supplement intended to support healthy hooves and coat in all horse types.
Hoof Formula (Kevin Bacon’s Horse Care) – [Discontinued]
Amino AcidAmino Acid
Competition HorsesCompetition Horses
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Hoof Formula from Kevin Bacon's Horse Care is a now discontinued hoof supplement that supports hoof growth and quality. It contains added protein, calcium, vitamin A, biotin and other minerals.
Hoof Mender 75 Supplement Pellets (Equimins)
Amino AcidAmino Acid
Hoof HealthHoof Health
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Equimins Hoof Mender 75 is a hoof care supplement providing 75 mg of biotin per day as well as zinc and amino acids. Research indicates benefits from feeding 20-30 mg of biotin to horses for hoof health, but has not demonstrated additive benefits of higher feeding rates.
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.
Horse & Pony Cubes (Spillers Feeds)
CalmingCalming
FiberFiber
GrainsGrains
Mineral BalanceMineral Balance
Spillers Feed Horse and Pony Cubes equine feed is suited for all adult horse and pony types. This feed has high amounts of starch and Vitamin E.
Horse & Pony Mix (Hilight)
Easy KeeperEasy Keeper
FiberFiber
HealthHealth
NutritionNutrition
Horse & Pony Mix from Hilight is intended to be fed to horses in light work. Horse & Pony Mix contains 9% crude protein and 2.5% fat. This feed is intended to provide a slow release of energy.
Horse Block (DuMor)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
ProteinProtein
DuMor Horse Block is a vitamin, mineral, and protein supplement for horses in a block format. It contains predominantly inorganic trace minerals and is intended to be offered free choice.
Horse Care 10 Cubes (Red Mills)
Competition HorsesCompetition Horses
DigestionDigestion
MuscleMuscle
Weight IssuesWeight Issues
Horse Care 10 Cubes from Red Mills is an oat-free horse feed. This feed is intended for performance horses, horses in training, easily stressed horses, and horses requiring additional body condition.
Horse Care 10 Mix (Red Mills)
Competition HorsesCompetition Horses
Gut HealthGut Health
MuscleMuscle
NutritionNutrition
Horse Care 10 Mix by Red Mills is a textured horse feed intended for competition, working, and temperamental horses. This feed is meant to support muscle and gastrointestinal function.
Horse Care 14 Cubes (Red Mills)
Competition HorsesCompetition Horses
Gut HealthGut Health
MuscleMuscle
NutritionNutrition
Horse Care 14 Cubes from Red Mills is intended for competition horses and temperamental horses. It is meant to support immune function, gastrointestinal health, muscle development, recovery, condition, and topline.
Horse Care 14 Mix (Red Mills)
Competition HorsesCompetition Horses
Gut HealthGut Health
ImmunityImmunity
NutritionNutrition
Horse Care 14 Mix from Red Mills is intended for competition horses and temperamental horses. It is meant to support immune function, gastrointestinal and hoof health, and muscle development.
Horse Care Ultra Cubes (Red Mills)
Competition HorsesCompetition Horses
DigestionDigestion
MuscleMuscle
NutritionNutrition
Horse Care Ultra Cubes from Red Mills is intended for performance horses, stallions, and horses prone to gastric issues. This feed contains 4% starch, 18% fiber, and 14% protein.
Horse Crunchies (Hoffman’s Horse Products)
Easy KeeperEasy Keeper
FlavorFlavor
HealthHealth
NutritionNutrition
Horse Crunchies from Hoffman's is a cubed treat for horses. Horse Crunchies are 22% NSC and are intended to be a healthy treat option for horses.
Horse Guard
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Horse Guard is a pelleted, concentrated vitamin-mineral supplement designed for all classes of horses. The recommended feeding rate is 2 oz per day.
Horse Low Starch Ration Balancer (Modesto Milling)
FiberFiber
ProteinProtein
Ration BalancerRation Balancer
VitaminsVitamins
Horse Low Starch Ration Balancer from Modesto Milling is a ration balancer containing 20% protein, 19% fiber and 9.7% fat. It also contains vitamins and minerals.
Horse Mineral (Hoffman’s Horse Products)
DigestionDigestion
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Hoffman's Horse Mineral is an equine mineral and vitamin supplement primarily intended for free-choice feeding large herds. It does not contain sugars, grains, or added starches.
Horse Mineral (Pegasus)
HealthHealth
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Horse Mineral from Pegasus is intended for all horses and ponies. This supplement is meant to balance forage-based diets. It contains chelated minerals, vitamins, and organic selenium.
Horse PLUS (Modesto Milling)
Caloric EnergyCaloric Energy
GrainsGrains
NutritionNutrition
ProteinProtein
Horse PLUS by Modesto Milling is a textured horse feed made using mostly organic ingredients. This feed contains grains, alfalfa, coconut meal, sunflower seeds, carrot pellets, flaxseed as well as added vitamins and minerals. It provides 12% crude protein, 4.5% fat and 13% crude fiber.
Horse Plus (Thrive Essential)
Mineral BalanceMineral Balance
PrebioticPrebiotic
ProbioticProbiotic
ProteinProtein
Horse Plus by Thrive Essential is a powdered daily vitamin and mineral supplement intended for all classes of horses. It is high in protein, and contains pre- and probiotics although the concentration is not disclosed.
Horse Power (Lakeland Feeds)
FiberFiber
HealthHealth
NutrientsNutrients
NutritionNutrition
Horse Power from Lakeland Feeds is a pelleted equine feed formulated with flax and rice bran. Horse Power is intended to aid in joint, hoof and coat health in horses of various life stages and work levels.
Horse Supplement Pellets (Modesto Milling)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Modesto Milling Horse Supplement Pellets is a pelleted source of energy, protein, vitamins, and minerals that can be added to a horse ration. The pellets are made with organic oats, alfalfa, coconut meal, and sesame meal.
Horse Tub (Agassiz Feeds)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Horse Tub by Agassiz Feeds is a molasses-based protein, energy, mineral, and vitamin lick. It is designed for free-choice use and contains a minimum of 14% crude protein.
Horseman’s Elite Horse/Mare Cubes (Bluebonnet Feeds)
BroodmareBroodmare
FiberFiber
FoalFoal
GrowthGrowth
Horseman's Elite Horse/Mare Cubes from Bluebonnet is a pasture supplement intended for broodmares. It comes in a 3/4" cube format and contains organic minerals.
Horseman’s Elite Mare & Foal Nugget (Bluebonnet Feeds)
BroodmareBroodmare
FoalFoal
GrowthGrowth
NutrientsNutrients
Horseman's Elite Mare & Foal Nuggets from Bluebonnet is a pelleted feed intended for pregnant, lactating, and growing horses. It provides 16% crude protein and contains soybean oil for added calories.
Horseman’s Elite Pelleted (Bluebonnet Feeds)
GrainsGrains
NutrientsNutrients
PerformancePerformance
ProbioticProbiotic
Horseman's Elite Pelleted feed from Bluebonnet Feed is intended for horses of all life stages and exercise levels. It contains 14% crude protein, added fat from soybeans, organic minerals, and biotin.
Horseman’s Elite Senior Care (Bluebonnet Feeds)
Mineral BalanceMineral Balance
ProteinProtein
SeniorSenior
VitaminsVitamins
Horseman's Elite Senior Care from Bluebonnet is a pelleted feed intended for senior horses who have trouble chewing. It contains alfalfa meal, rice hulls, soybean meal, and molasses as a source of energy.
Horseman’s Elite Ultra Fat (Bluebonnet Feeds)
Caloric EnergyCaloric Energy
NutrientsNutrients
PerformancePerformance
ProbioticProbiotic
Horseman's Elite Ultra Fat from Bluebonnet Feeds is a pelleted feed intended for horses at all life stages. This feed contains added soybean oil as a source of fat. It supplies 10% protein, 10% fat, and 18% fibre.
HS-35 Horse Supplement (Optimin)
Amino AcidAmino Acid
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
HS-35 Horse Supplement is a loose vitamin-mineral supplement in a soybean and flaxseed base. It is formulated with both organic and inorganic minerals, yeast, and lactic acid bacteria as a probiotic.

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