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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.
Show Calm (Daily Dose Equine)
CalmingCalming
Competition HorsesCompetition Horses
HerbHerb
StressStress
Show Calm by Daily Dose Equine is a powdered supplement that is intended to support calming behaviours. This is meant for performance horses, sales prep, training, and hauling.
Show Ready EQ (Foxden Equine)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
NutrientsNutrients
StressStress
Show Ready EQ by Foxden Equine is a paste supplement intended for performance horses. It contains ingredients such as magnesium proteinate, magnesium citrate, L-tryptophan, and B vitamins to support calm behaviour.
Show Time (Capstone Horse Feed)
HealthHealth
NutrientsNutrients
NutritionNutrition
SeniorSenior
Show Time by Capstone Horse Feed is a low energy, maize-free feed intended for mature and leisure horses.
Showman (ProElite)
Complete FeedComplete Feed
Low NSC FeedsLow NSC Feeds
MuscleMuscle
PerformancePerformance
ProElite by Showman is a pelleted, extruded feed intended for mature horses in moderate to intense work. It is intended to be a low glycemic feed for supporting muscle strength.
Showtorque (Hygain)
Complete FeedComplete Feed
FatFat
MuscleMuscle
ProteinProtein
Showtorque by Hygain is a high-protein and fat pelleted feed designed for performance horses. It contains 20% protein, 9% fat, and 16% fibre with added yeast for improved digestion.
Sixteen Plus Mix (Dodson & Horrell)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
MuscleMuscle
SeniorSenior
Sixteen Plus Mix by Dodson & Horrell is a textured senior horse feed with higher protein levels and added vitamins and minerals for joint health and optimal absorption. This feed is also highly palatable with molasses, ricebran, and rapeseed oil ingredients.
Slim (NAF Equine)
Easy KeeperEasy Keeper
HerbHerb
NutrientsNutrients
Weight IssuesWeight Issues
Slim from NAF Equine is intended for easy keepers. This supplement is meant to be fed alongside a calorie efficient diet. Slim contains mint and spirulina.
Slobber Mash (Havens Horsefeed)
FiberFiber
Hoof HealthHoof Health
NutritionNutrition
Skin + HairSkin + Hair
Slobber Mash is a grain-based equine feed containing barley flakes, wheat bran, and corn. This feed is intended for older horses with difficulty chewing and broodmares to support fertility. It is a palatable feed with a high 44.2% NSC.
SmartCalm Ultra Pellets (SmartPak)
CalmingCalming
Mineral BalanceMineral Balance
StressStress
VitaminsVitamins
SmartCalm Ultra Pellets by SmartPak is a pelleted supplement for horses intended to support proper nervous system function. It contains tryptophan, magnesium and B-vitamins in highly palatable form with no added sugar.
SmartEssentials Pellets (SmartPak)
Mineral BalanceMineral Balance
Omega 3-6-9Omega 3-6-9
Ration BalancerRation Balancer
VitaminsVitamins
SmartEssentials Pellets from SmartPak is a vitamin and minerals supplement with added essential fatty acids and amino acids. Omega-3s are sourced from flaxseed and fish oil.
SmartGut Pellets (SmartPak)
DigestionDigestion
Gut HealthGut Health
ProbioticProbiotic
UlcersUlcers
SmartGut Pellets is a gut supplement intended to neutralize gastric acid and maintain optimal stomach health. This supplement provides prebiotics, probiotics, and soluble fibre to support a healthy stomach lining.
SmartGut Ultra Pellets (SmartPak)
Gut HealthGut Health
HindgutHindgut
ImmunityImmunity
NutrientsNutrients
SmartGut Ultra Pellets from Smart Pak is a pelleted gut supplement. SmartGut Ultra Pellets are intended for horses with occasional gastric problems. This supplement is formulated with slippery elm intended to soothe the gastrointestinal tract in horses.
SmartHollistic CBD + Calm Support Pellets (SmartPak)
CalmingCalming
HealthHealth
HerbHerb
StressStress
SmartHollistic CBD + Calm Support from SmartPak is a pelleted calming supplement for horses. SmartHollistic CBD + Calm Support is intended to support a calm demeanour in horses with ingredients such as adaptogens ashwagandha, passion flower and Siberian ginseng.
SmartLytes (SmartPak)
ElectrolyteElectrolyte
HydrationHydration
IngredientIngredient
PerformancePerformance
SmartLytes from SmartPak is a pelleted equine electrolyte. SmartLytes is intended to provide sodium chloride which can be lost during exercise.
SmartMare Harmony (SmartPak)
CalmingCalming
HealthHealth
HerbHerb
StressStress
SmartMare® Harmony Pellets is an equine supplement intended for moody mares. It contains chamomile, passionflower, raspberry leaf, chasteberry, dong quai and ashwagandha to support a calm mood.
SmartMetabo-Lean Pellets (Smart Pak)
HealthHealth
MetabolismMetabolism
Metabolic SyndromeMetabolic Syndrome
NutritionNutrition
SmartMetabo-Lean Pellets from SmartPak is a pelleted equine supplement intended to help manage insulin resistance in horses. SmartMetabo-Lean Pellets are formulated with magnesium and chromium intended to support proper insulin function in horses.
SmartPerform Ultra Pellets (SmartPak)
DigestionDigestion
Gut HealthGut Health
ImmunityImmunity
JointsJoints
SmartPerform Ultra Pellets from SmartPak is a pelleted equine supplement intended to support joint and gut health. SmartPerform Ultra Pellets is formulated with turmeric, resveratrol, glucosamine and chondroitin sulphate which are intended to support gut and joint health in horses.
SmartVite Perform (SmartPak)
Competition HorsesCompetition Horses
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
VitaminsVitamins
SmartVite Perform is a pelleted mineral and vitamin supplement intended for performance horses. It includes higher nutrient levels which can support horses in heavy exercise.
SmartVite Perform Senior (SmarkPak)
ImmunityImmunity
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
SmartVite Perform Senior is a vitamin and mineral supplement for working senior horses. It is also intended to support immunity and provide antioxidants.
SmartVite Thrive (SmartPak)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
SmartVite Thrive is a ration balancer meant to provide adult horses with essential vitamins and minerals in light or no work. It also contains vital amino acids and is highly palatable with vegetable oil, rice bran, and flaxseed meal ingredients.
SmartVite Thrive Senior (SmartPak)
HealthHealth
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
SmartVite Thrive Senior Pellets is a low feeding rate mineral and vitamin supplement for senior horses. It is formulated with added antioxidants for immune function and increased levels of B vitamins.
Solution 10-10-10 (Tucker Milling)
EnergyEnergy
GrainsGrains
NutrientsNutrients
PerformancePerformance
Solution 10-10-10 by Tucker Milling is a textured feed specially formulated for mature performance horses. With 10% protein, 10% fat, and 10% fiber, it delivers a balanced nutritional profile that meets energy demands while keeping protein levels moderate.
Solution-12 (Tucker Milling)
Complete FeedComplete Feed
DigestionDigestion
FiberFiber
SeniorSenior
Solution 12 by Tucker Milling is a pelleted feed formulated for senior horses and is intended to be fed alongside forage. It includes lactic acid bacteria and yeast to support digestive health, though the specific inclusion levels are not disclosed.
Solutions 10 Textured (Right Choice)
Complete FeedComplete Feed
FatFat
Gut HealthGut Health
NutritionNutrition
Solutions 10 Textured by Right Choice is a textured complete feed containing 10% protein, 10% fat, and 26.5% NSC. It is formulated for horses in work and maintenance.
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 Pellet (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 14 Pellet is a complete feed with 14% protein and 6% fat intended for horses at maintenance or in work. It utilizes alfalfa meal and extruded soybeans for protein.
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.
Soothe & Gain (Allen & Page)
DigestionDigestion
FiberFiber
HindgutHindgut
NutritionNutrition
Soothe & Gain from Allen & Page is a high-energy feed which is high in fibre. Soothe & Gain is intended for horses and ponies who are prone to ulcers and digestive upsets. Soothe & Gain is free from barely, molasses, alfalfa and soy.
SoyChlor (Landus Cooperative)
Bone HealthBone Health
ElectrolyteElectrolyte
IngredientIngredient
Mineral BalanceMineral Balance
SoyChlor is a feed additive primarily used in dairy cattle. It is a source of chloride ions, and is used to balance dietary cation-anion difference (DCAD). SoyChlor also contains calcium and magnesium.
Special 13 (Hallway Feeds)
EnergyEnergy
GrowthGrowth
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
Special 13 by Hallway Feeds is a textured sweet feed formulated with added protein, vitamins, and minerals to support the development of young horses and maintain the health of mature horses
Speed Feed (MAC)
HealthHealth
NutrientsNutrients
NutritionNutrition
PerformancePerformance
Speed Feed by MAC is a feed containing 14% protein and 4% fat, it is intended for all horse types.
SpeedFeed (Dunstan)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
SpeedFeed by Dunstan is a complete textured feed intended to meet the nutrient requirements of racehorses and performance horses. It is formulated using a highly palatable blend of cereals including Oats, Maise, Barley, Lupins, Sugarbeet, Sunflower Seeds, Vegitable Oils and a Vitamin and Mineral premix.
Sport 14 (McCauley’s)
FatFat
NutrientsNutrients
PerformancePerformance
ProteinProtein
Sport 14 from McCauley's is a pelleted horse feed. It is intended for racing or performance horses and is meant to support gut health. It is high in fat and protein.
Sport Horse Grass (Uckele)
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
Sport Horse Grass is a pelleted vitamin, mineral, and amino acid supplement intended for performance horses consuming a grass-based diet. This supplement is intended to support muscular function, joint/tendon maintenance, and recovery.
Sport Horse Mix (Elk Grove Milling)
Caloric EnergyCaloric Energy
FiberFiber
NutrientsNutrients
PerformancePerformance
Sport Horse Mix by Elk Grove Milling is a complete feed containing copra meal to provide cool energy. It is intended for horses in moderate work.
Sport Muesli (Havens Horsefeed)
BroodmareBroodmare
FiberFiber
NutritionNutrition
PerformancePerformance
Sport Muesli by Havens Horsefeed is a 13% protein textured feed intended for equine athletes. It contains alfalfa meal, corn flakes, oats, and flax oil as protein and energy sources.
SQM Mg 10% – Magnesium (QualiTech)
Bone HealthBone Health
ImmunityImmunity
MetabolismMetabolism
Mineral BalanceMineral Balance
SQM Magnesium (Mg) 10% is a single-ingredient mineral supplement providing an organic polysaccharide complex with elemental magnesium. It is used as a feed ingredient for livestock.
Stability (Excel Equine Feeds)
Easy KeeperEasy Keeper
HealthHealth
NutrientsNutrients
NutritionNutrition
Stability is a pelleted feed from Excel Equine Feeds. This feed is intended for horses in any level of work, and stage of life.
Stability EQ (Foxden Equine)
CalmingCalming
HerbHerb
MareMare
StressStress
Stability EQ by Foxden Equine is a powdered supplement intended to support normal mental equilibrium in cycling mares and nervous geldings. It contains ingredients such as raspberry leaf, L-theanine and magnesium.
Stable MAX Performance (Elk Grove Milling)
Complete FeedComplete Feed
MareMare
PerformancePerformance
StallionStallion
Stable MAX Performance is a complete feed from Elk Grove Milling intended for performance horses, stallions, and broodmares. It provides probiotics and 14% protein.
Stable MAX Senior Lite (Elk Grove Milling)
Complete FeedComplete Feed
NutritionNutrition
ProbioticProbiotic
SeniorSenior
Stable MAX Senior Lite is a complete feed from Elk Grove Milling intended for senior horses, hard keepers, and metabolic horses. It provides probiotics and 15% protein.
Stable MAX Ultra Mate (Elk Grove Milling)
Complete FeedComplete Feed
Easy KeeperEasy Keeper
ProbioticProbiotic
ProteinProtein
Stable MAX Ultra Mate is a complete feed from Elk Grove Milling intended for easy keepers or horses in light work. It provides probiotics and 30% protein.
Stable Mix (Elk Grove Milling)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
FiberFiber
Gut HealthGut Health
Stable Mix by Elk Grove Milling is a complete pelleted formula intended for all horses. This feed is high in fiber (30%) and can be used to replace forage in a horse's diet.
Stable Mix Futurity (Elk Grove Milling)
GrowthGrowth
PerformancePerformance
PrebioticPrebiotic
ProbioticProbiotic
Stable Mix Futurity by Elk Grove Milling is a pelleted feed intended for young horses in training.
Stable Mix GC (Elk Grove Milling)
Complete FeedComplete Feed
HealthHealth
JointsJoints
NutrientsNutrients
Stable Mix GC by Elk Grove Milling is a complete pelleted feed containing glucosamine and chondroitin. It is intended for horses that show signs of arthritis.
Stable Mix Lite (Elk Grove Milling)
Complete FeedComplete Feed
HealthHealth
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
Stable Mix Lite by Elk Grove Milling is a high fiber feed containing less than 12% NSC. It is intended for easy keepers, or horses needing low sugar and starch diets.
Stabul 1 (Anderson Feed Co)
Easy KeeperEasy Keeper
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Weight IssuesWeight Issues
Stabul™ 1 is a low-starch (5%) and low-sugar (5%) feed intended for easy keepers and horses, ponies and mules with metabolic concerns. It is corn, oats and molasses-free.
Stabul 1 Plus (Anderson Feed Co)
ExerciseExercise
Metabolic SyndromeMetabolic Syndrome
NutritionNutrition
Weight IssuesWeight Issues
Stabul™ 1 Plus is a low-starch (5%) and low-sugar (5%) feed intended for horses that are in work or hard keepers. It is designed for horses with metabolic concerns to provide higher energy density.
Stake Horse (Woody’s Horse Nutrition)
Competition HorsesCompetition Horses
DigestionDigestion
FiberFiber
PerformancePerformance
Stake Horse by Woody’s Horse Nutrition is a beet-based 9% fat and 13% protein feed intended for racehorses. It is made with molasses, oats, barley, and beet pulp. This horse is intended for racehorses or performance horses.
Stallion Max (Hallway)
Caloric EnergyCaloric Energy
NutritionNutrition
Omega 3-6-9Omega 3-6-9
StallionStallion
Stallion Max from Hallway is a fortified high-fat, high-fibre feed formulated for stallions. This feed has added omega-3 fatty acids. Stallion Max contains 14% protein, 6% fat, and 12% fibre. It is recommended to start feeding 'Stallion Diets' 60 to 90 days before breeding season begins.

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