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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.
No.7 Stud & Youngstock Mix (Baileys Horse Feeds)
FoalFoal
GrowthGrowth
NutritionNutrition
StallionStallion
No.7 Stud & Youngstock Mix from Baileys Horse Feeds is intended for growing youngstock, covering stallions, and pregnant and lactating mares. This feed contains 32% of starch, such as micronized peas, micronized maize, and oats.
No.8 Meadow Sweet With Turmeric (Baileys Horse Feeds)
FiberFiber
GrainsGrains
Gut HealthGut Health
NutritionNutrition
No.8 Meadow Sweet with Turmeric from Baileys Horse Feeds is high in fiber and low in starches and sugars. This feed is ideal for horses and ponies prone to laminitis and in moderate work and older horses.
No.9 All-Round Competition Mix (Baileys Horse Feeds)
Coat QualityCoat Quality
EnergyEnergy
ExerciseExercise
PerformancePerformance
No.9 All-Round Competition Mix from Baileys Horse Feeds is intended for performance horses and ponies. This feed contains 32% starch which comes from micronized cereals.
Nordic Vitamin Complete (Nordic Horse)
Low NSC FeedsLow NSC Feeds
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Nordic Vitamin Complete by Nordic Horse is a pelleted vitamin and mineral supplement intended for horses with intolerances or sensitive digestive systems.
Northwest Horse Supplement (NW)
AntioxidantAntioxidant
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Northwest Horse Supplement is a supplement containing trace minerals, yeast, antioxidants and vitamins. It is intended for stallions and performance, maintenance, and halter horses.
Nupafeed® Magnesium (Nupafeed)
CalmingCalming
HealthHealth
RecoveryRecovery
StressStress
Nupafeed® Magnesium is a daily liquid supplement for horses, containing magnesium aspartate hydrochloride. It is formulated to help reduce stress and relieve muscle tension
Nutrequin Classic Formula Supplement (Equistro)
HealthHealth
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
EQUISTRO's Nutrequin Classic is a vitamin and mineral supplement targeted to performance horses, pregnant mares and growing foals and weanlings. It contains inorganic minerals, wheat germ meal, alfalfa meal and mineral oil.
Nutrequin Elite (Equistro)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Nutrequin Elite is a vitamin, mineral, and amino acid supplement formulated for performance horses as well as lactating and pregnant mares.
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.
Nutrimix Plus (Stride Animal Health) – [Discontinued]
Coat QualityCoat Quality
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Nutrimix Plus from Stride Animal Health is a vitamin and mineral supplement that can support healthy hooves. It can also contribute to hair and coat quality.
Oat Balancer (Dodson & Horrell)
Amino AcidAmino Acid
MareMare
Ration BalancerRation Balancer
StallionStallion
Oat Balancer by Dodson & Horrell is a ration balancer meant to be fed supplementally with oats. It provides a higher level of vitamin E to support milk quality and fertility.
Oat Balancer Cooked Mix (Red Mills)
BroodmareBroodmare
Competition HorsesCompetition Horses
PerformancePerformance
StallionStallion
Oat Balancer Cooked Mix from Red Mills is a feed intended for youngstock, racehorses, and breeding stock. This feed is designed to support performance, recovery, growth, bone integrity, and coat condition.
Oat Balancer Mix (Baileys Horse Feeds)
Caloric EnergyCaloric Energy
GrainsGrains
Ration BalancerRation Balancer
VitaminsVitamins
Oat Balancer Mix from Baileys Horse Feeds is intended for racehorses being fed a high oat diet in heavy work. This textured, high-energy feed is formulated to be fed alongside oats to counteract nutrient deficiencies that may come as a cause of feeding only oats.
Oestress (NAF Equine)
AntioxidantAntioxidant
CalmingCalming
HerbHerb
MareMare
Oestress from NAF Equine is intended to support hormonal balance in mares. This supplement contains herbs such as chastetree berries, cramp bark, and black cohosh.
Oestress Liquid (NAF Equine)
CalmingCalming
HerbHerb
MareMare
StressStress
Oestress Liquid from NAF Equine is a horse supplement that is intended to balance hormones in mares. This liquid supplement contains magnesium, chaste tree berries, and cramp bark.
Oilovite (NAF Equine)
Coat QualityCoat Quality
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Oilovite from NAF Equine is intended for all horses and ponies. This supplement is meant to provide vitamins and minerals to support overall health. Oilovite also contains soya, linseed, and hemp oil.
Old Horse (Dunstan)
FiberFiber
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
NutrientsNutrients
Old Horse by Dunstan is a high fibre feed intended for older horses at increased risk of metabolic disorders.
Omega Advantage (ProElite)
FatFat
GrowthGrowth
Omega 3-6-9Omega 3-6-9
PerformancePerformance
ProElite Omega Advantage is an extruded horse supplement providing 24% fat with added flax. It is intended to provide extra calories and aid in weight gain.
Omega Bran (McCauley’s)
FatFat
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Omega Bran by McCauley's is a high fat (27.8%) supplement containing vitamins and minerals, it is intended for all horses.
Omega Match Ration Balancing Horse Feed (Purina)
EnergyEnergy
FatFat
FiberFiber
ProteinProtein
Purina Omega Match Ration Balancer is a pelleted feed intended for horses at any activity level and life stage. It is designed to fill nutrient gaps from forage or unfortified grains.
Omolene #300® Growth Concentrate (Purina Mills)
BroodmareBroodmare
Complete FeedComplete Feed
FoalFoal
LactationLactation
Omolene 300 Growth is a textured feed designed for foals, weanlings, yearlings and mares in gestation or lactation. It contains 16% crude protein, 6% crude fat and 7% fibre.
Omolene 200 Performance RT (Purina)
BroodmareBroodmare
Complete FeedComplete Feed
Competition HorsesCompetition Horses
GrowthGrowth
Purina® Omolene® #200 RT is a textured feed intended for performance horses, providing 6% fat and 14% fibre. Energy sources include whole grains and a soy oil-molasses blend.
Omolene 400 Complete Advantage (Purina)
DigestionDigestion
ExerciseExercise
Gut HealthGut Health
UlcersUlcers
Purina® Omolene® #400 Complete Advantage is a textured complete feed intended for active pleasure and senior horses. It contains beet pulp shreds, vegetable oils, and a soy oil-molasses blend to improve palatability.
Omolene 400 Complete Advantage RT (Purina)
DigestionDigestion
ExerciseExercise
Gut HealthGut Health
UlcersUlcers
Purina® Omolene® 400 Complete Advantage RT is a textured feed intended for performance horses. It is a calorie-dense blend of 8% fat, 16% fibre and grains.
Omolene 500 Competition (Purina)
Competition HorsesCompetition Horses
DigestionDigestion
EnergyEnergy
NutritionNutrition
Omolene #500® Competition is a textured feed intended for performance and endurance athletes and horses in heavy work. It provides a higher energy density with 8% fat.
Omolene Maternity 300 (Purina Canada)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Purina Omolene Maternity 300 is a textured horse feed intended for broodmares, nursing and growing foals. It provides higher amino acid content to support growth and development.
Omolene Progression 200 (Purina)
BroodmareBroodmare
Complete FeedComplete Feed
PerformancePerformance
StallionStallion
Omolene Progression 200 is a textured feed intended for performance horses, growing horses and gestating mares. It supplies 14% protein and 7% fat from ingredient sources including soybean meal, soybean oil, whole oats, flaked barley and extruded corn.
Omolene Senior Action (Purina)
ExerciseExercise
PerformancePerformance
Ration BalancerRation Balancer
SeniorSenior
Omolene Senior Action is a complete textured feed formulated for active senior horses. It provides 14% protein, which may support muscle tone in senior horses that are not receiving enough protein from their forage.
Omolene Sport Plus (Purina)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Purina Omolene Sport Plus is a textured complete feed intended for horses in heavy work including racehorses. It provides 8% fat from vegetable oils and contains beet pulp as a high pectin fibre source.
Omolene® #100 Active Pleasure Horse Feed (Purina Mills)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
ExerciseExercise
Gut HealthGut Health
Omolene 100 Active Pleasure Horse Feed is a textured feed targeted to horses in maintenance to moderate work. It provides 10% crude protein, 10% fibre and 4.5% fat.
Omolene® #200 Performance Horse Feed (Purina Mills)
Complete FeedComplete Feed
ExerciseExercise
Gut HealthGut Health
PerformancePerformance
Omolene 200 Performance Horse Feed is a textured feed targeted to performance horses, broodmares in gestation and lactation, and breeding stallions. It contains added fat, carbohydrates, and molasses to support high caloric needs.
Omolene® #400 Complete Advantage (Purina Mills)
Complete FeedComplete Feed
ExerciseExercise
FiberFiber
SeniorSenior
Omolene 400 Complete Advantage is a textured horse feed for active and senior horses. It contains highly digestible fibre from beet pulp and fat from vegetable oils, flax seed and rice bran.
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.
OneCup for Horses (GWF Nutrition)
Easy KeeperEasy Keeper
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
VitaminsVitamins
OneCup for Horses by GWF Nutrition is a pelleted ration balancer that intends to provide the vitamins and minerals necessary to maintain an easy-keeper. It contains 22 vitamins and minerals.
Opti-Ferm Lix 16% All Stock (Kalmbach Feeds)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Opti-Ferm Lix 16% All Stock by Kalmbach Feeds is an energy, vitamin, and mineral supplement tub. It is intended for cattle, sheep, horses, and goats on moderate to high quality forage.
Optima (Banks Mill Feeds)
Grain FreeGrain Free
Gut HealthGut Health
Metabolic SyndromeMetabolic Syndrome
Omega 3-6-9Omega 3-6-9
Optima-LA from Banks Mill is a low starch pelleted feed intended for horses at all life stages. It provides energy from soybeans, wheat middlings, alfalfa meal, beet pulp, dried molasses, flax, and vegetable oil.
Optimize (Uckele)
FiberFiber
Low NSC FeedsLow NSC Feeds
MetabolismMetabolism
NutrientsNutrients
Optimize is a pelleted ration balancer with a feeding rate of 1-2 lbs per day. It is formulated for horses needing a low starch and sugar diet, such as horses with metabolic disorders. The NSC content in this ration balancer is 7.8%
Optimum (NAF Equine)
Easy KeeperEasy Keeper
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
VitaminsVitamins
Optimum by NAF Equine is a pelleted ration balancer that is formulated to provide the vitamins and minerals for a high-fiber and low concentrate diet or a performance diet.
Optimum EQ 2.0 (BioStar)
Bone HealthBone Health
HealthHealth
Mineral BalanceMineral Balance
PerformancePerformance
Optimum EQ 2.0 by BioStar is a vitamin and mineral supplement containing amino acids and mineral proteinates.
Optimum GI (BioStar)
DigestionDigestion
Gut HealthGut Health
HealthHealth
ImmunityImmunity
Optimum GI from BioStar is a powdered gut health supplement. Optimum GI contains vitamins, antioxidants, minerals and fatty acids intended to support whole horse health. This supplement is intended to support normal digestive function.
Optimum Senior JS 2.0 (BioStar)
HealthHealth
JointsJoints
NutritionNutrition
RecoveryRecovery
Optimum Senior JS 2.0 by BioStar is a powdered vitamin and mineral supplement formulated to support joint health in senior horses. It contains glutamine as well as the omega-3 fatty acids EPA and DHA.
Organic Essential Mag (Pennwoods)
CalmingCalming
HealthHealth
MetabolismMetabolism
Organic Trace MineralsOrganic Trace Minerals
Organic Essential Mag by Pennwoods is a magnesium supplement formulated for horses. Magnesium supports metabolic health and helps promote a calm, balanced demeanour in horses.
Original 12 Textured (McCauley’s Equine Formulas)
BroodmareBroodmare
Complete FeedComplete Feed
LactationLactation
StallionStallion
Original 12 Textured is a palatable oat-based feed targeted to broodmares and stallions. It is formulated with added yeast and organic minerals. It is designed to promote healthy gut function.
Original 14 Pelleted (McCauley’s)
Feed EfficiencyFeed Efficiency
GrainsGrains
GrowthGrowth
NutritionNutrition
McCauley's Original® 14 Pelleted is a pelleted horse feed with 14% protein to meet the needs of breeding and growing horses. This oat-based formula contains 3.5% fat and 12% fibre.
Original 14 Textured (McCauley’s Equine Formulas)
Feed EfficiencyFeed Efficiency
GrowthGrowth
HealthHealth
LactationLactation
McCauley's Original 14 Textured is an oat-based feed for stallions, breeding, growing, and performance horses. It is fortified with organic minerals and contains yeast for digestive health.
Original 16 Textured (McCauley’s Equine Formulas)
BroodmareBroodmare
Feed EfficiencyFeed Efficiency
FoalFoal
LactationLactation
McCauley's Original 16 Textured is an oat-based horse feed for breeding and growing horses. It contains higher protein (16%) to meet the needs of growing yearlings and lactating broodmares.
Original Balancer (Horslyx)
Easy KeeperEasy Keeper
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Original Balancer from Horslyx is intended to balance nutrient deficiencies in horses and ponies who eat primarily forage or grass. This product contains cane molasses to help palatability and biotin to support hoof health.
Original Multi Balancer (Spillers Feeds)
Gut HealthGut Health
Hoof HealthHoof Health
ImmunityImmunity
Ration BalancerRation Balancer
VitaminsVitamins
The Original Multi Balancer from Spillers Feed is cereal grain-free, low in sugars, and low in starches. This feed is high in Vitamins and minerals such as Vitamin A, Vitamin D3, Vitamin E, Copper, and Zinc.
Original Performance Formula (Wilson Feeds)
HealthHealth
NutritionNutrition
PerformancePerformance
Ration BalancerRation Balancer
Original Performance Formula by Wilson Feeds is a soy-free supplement intended to fill nutritional gaps of horses on a forage-based diet.

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