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Selenium - Feed Ingredient

Selenium is an essential trace mineral required in equine nutrition for its role in antioxidant defense, immune function, and thyroid hormone metabolism. It is a key component of glutathione peroxidase, an enzyme that helps protect cells from oxidative damage by neutralizing free radicals. Selenium also plays a role in muscle function and overall metabolic health.

Horses can obtain selenium from forages, but its content varies depending on soil selenium levels in different regions. In areas with selenium-deficient soils, supplementation is necessary to prevent deficiencies, which can lead to conditions such as white muscle disease, impaired immune function, and poor reproductive health. Selenium is commonly supplemented in the form of sodium selenite, sodium selenate, or organic selenium sources such as selenium yeast, which is considered more bioavailable.

Because selenium has a narrow margin of safety, excessive intake can lead to toxicity, characterized by symptoms such as hair loss, hoof abnormalities, and neurological issues. Proper formulation and monitoring of selenium intake are essential to ensure optimal health in horses.

The following equine feeds, supplements and products contain Selenium 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.
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.
Trace Mineral Pak (Mad Barn)
Coat QualityCoat Quality
ExerciseExercise
Hoof HealthHoof Health
Organic Trace MineralsOrganic Trace Minerals
Trace Mineral Pak from Mad Barn is a balanced equine supplement providing 100% organic (chelated) trace minerals. Ingredients include selenium, zinc, copper, and manganese.
Total Performance (DAC)
HealthHealth
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Total Performance by DAC is a vitamin and mineral supplement designed for mature performance horses. It is formulated with trace minerals, amino acids and probiotics.
Total Performance Plus (DAC)
HealthHealth
JointsJoints
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Total Performance Plus by DAC is a powered joint supplement enriched with vitamins and minerals. It contains glucosamine, chondroitin sulfate, and sodium hyaluronate.
Total Plus Original (Arnall’s Naturals)
HealthHealth
ImmunityImmunity
NutritionNutrition
PerformancePerformance
Total Plus from Arnall's Naturals is a powdered 'all-in-one' supplement. This supplement is intended to support overall equine health and well-being.
Total Supplement (Total Supplements)
ImmunityImmunity
Mineral BalanceMineral Balance
RecoveryRecovery
VitaminsVitamins
Total Supplement is a horse supplement that contains vitamins, minerals, amino acids, and probiotics. It can assist with joint support, immunity and muscle recovery.
Total Topline (Ramard)
MuscleMuscle
PerformancePerformance
RecoveryRecovery
ToplineTopline
Total Topline from Ramard is a powdered supplement that aims to build muscle and topline, increase performance, assist in the growth and development of young horses, and help with muscle recovery and maintenance.
Tough as Nails (Tribute)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Tribute Tough As Nails is a pelleted horse supplement formulated to support hoof growth. It contains biotin, calcium, iodine, organic minerals and the amino acid methionine.
Tough To Beet® (Tribute Equine)
EnergyEnergy
FatFat
FiberFiber
PerformancePerformance
Tough To Beet® is a high-fat textured feed formulated with shredded beet pulp, grains and soybean oil. This feed targets mature horses in training to meet their calorie needs.
Track Burner (Quality Feeds)
Competition HorsesCompetition Horses
EnergyEnergy
NutrientsNutrients
PerformancePerformance
Track Burner by Quality feeds is a textured sweet feed containing vitamins and minerals. It is intended to meet the high energy demands of racehorses.
Tracktorque (Hygain)
DigestionDigestion
EnergyEnergy
Gut HealthGut Health
Skin + HairSkin + Hair
Tracktorque by Hygain is a high-energy feed meant for high performance horses including racing, training, and intense competition. It contains vitamins, minerals, prebiotics, probiotics and is intended to assist with gut health, digestion, coat health, muscle and heart health.
Tradition 12 (Hallway)
BroodmareBroodmare
Complete FeedComplete Feed
Competition HorsesCompetition Horses
NutritionNutrition
Tradition 12 from Hallway is a fortified feed cube formulated for broodmares, stallions, and performance horses. This feed contains 12% protein, 4% fat, and 9% fibre
Tradition Mix (Cavalor)
DigestionDigestion
HealthHealth
NutrientsNutrients
NutritionNutrition
Tradition Mix by Cavalor is a textured feed intended for horses at maintenance or light work.
Trail Mate Sweet Formula (Bartlett Milling) [Discontinued]
Competition HorsesCompetition Horses
EnergyEnergy
ExerciseExercise
FlavorFlavor
Trail Mate Sweet Formula is a grain-based feed intended for western, pleasure and trail horses in moderate to rigorous work. It contains 13% protein, 4% fat and 11% fibre from sources such as wheat middlings, corn, oats and barley.
Trail Mix (Running Horse Elite Equine Nutrition)
Complete FeedComplete Feed
FiberFiber
HealthHealth
Mineral BalanceMineral Balance
Running Horse Trail Mix is a concentrated feed containing high fiber, vitamins, minerals, and 12% protein. This feed targets adult horses that are inactive or performing light work.
Trail Time (McCauley’s Equine Formulas)
Complete FeedComplete Feed
Feed EfficiencyFeed Efficiency
Gut HealthGut Health
HealthHealth
Trail Time® is an oat-based textured feed targeted at adult horses at maintenance or in light work. It provides a lower energy density and fat content than other McCauley feeds.
Trainers 12% (Quality Feeds)
Easy KeeperEasy Keeper
GrainsGrains
HealthHealth
NutrientsNutrients
Trainers 12% by Quality Feeds is a complete textured sweet feed intended to support horses at maintenance and in light to moderate work.
Training Formula (Triple Crown) – [Discontinued]
EnergyEnergy
ExerciseExercise
FatFat
PerformancePerformance
Triple Crown Training Formula is now a discontinued feed which was a high-calorie, high-fat feed designed to meet the energy requirements of exercising horses. Energy sources included oats, molasses, soybeans, beet pulp, alfalfa and wheat middlings.
Tribute Ultra (Tribute)
ExerciseExercise
FatFat
NutrientsNutrients
Weight IssuesWeight Issues
Tribute Ultra is intended for hard keepers and horses and ponies in heavy work. This feed is meant to support weight gain and performance with its 12% fat and 12% protein formula.
Trifecta (Buckeye) – [Discontinued]
Complete FeedComplete Feed
FlavorFlavor
NutritionNutrition
PerformancePerformance
Buckeye TRIFECTA™ Sweet Pelleted Feed is a palatable and calorie-dense feed containing cane molasses to increase intake. TRIFECTA™ is intended for performance horses with higher energy demands.
Trifecta (Horse Guard)
HealthHealth
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Trifecta from Horse Guard is a powdered vitamin, mineral, hoof, and joint supplement with added prebiotics and probiotics. It contains glucosamine, MSM, and hyaluronic acid to help with joint support. Trifecta also contains added iron and 32 mg of biotin per serving.
Trifiber Compete (Excel Equine Feeds)
Caloric EnergyCaloric Energy
Low NSC FeedsLow NSC Feeds
PerformancePerformance
Weight IssuesWeight Issues
Trifiber Compete from Excel Equine Feeds is meant for performance horses and has a low NSC content. It is a safe source of calories with fat and fiber. It is made to be beneficial to horses prone to metabolic conditions and horses with weight issues.
Triformance (McCauley’s Equine Formulas)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Triformance® is a textured feed targeted to performance horses, including racehorses and eventers. It has high energy and fat content and provides higher levels of antioxidant nutrients such as Vitamin E.
Triple Play (Equi-lete)
Gut HealthGut Health
HealthHealth
PerformancePerformance
Weight IssuesWeight Issues
Triple Play by Equi-lete is a vitamin and mineral supplement intended to support gastric health, performance and body condition in hard keepers, performance horses and breeding stock.
Triplify (Excel Equine Feeds)
Competition HorsesCompetition Horses
HealthHealth
NutritionNutrition
PerformancePerformance
Triplify is a textured feed from Excel Equine Feeds. Triplify is intended for horses in moderate to heavy work, and contains 10% protein and 10% fat.
Triumph 12-8 Horse Feed (Nutrena)
MareMare
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Triumph 12-8 Horse Feed by Nutrena is a feed that is intended for mares, breeding horses, maintenance, and performance horses. It has 12% protein, 12% fiber, and 8% fat.
Triumph Active 12 Pellet (Nutrena)
HealthHealth
MuscleMuscle
NutritionNutrition
RecoveryRecovery
Nutrena Triumph® Active 12 Pellet is an 18% NSC feed intended for active mature horses. It contains added methionine and lysine which are meant to support muscle development.
Triumph Complete (Nutrena)
Complete FeedComplete Feed
EnergyEnergy
NutritionNutrition
ProteinProtein
Triumph Complete is a high-fibre, moderate protein and low-fat complete feed formulated with 22% NSC. It is formulated as a hay stretcher that can be used to replace portions of forage.
Triumph Fiber Plus (Nutrena)
DigestionDigestion
EnergyEnergy
FiberFiber
NutritionNutrition
Triumph Fiber Plus is a high fat and fibre complete feed providing 12% protein, 10% fat and 17% NSC. Triumph Fiber Plus is formulated for mature horses of all exercise levels.
Triumph Professional (Nutrena)
Complete FeedComplete Feed
EnergyEnergy
NutritionNutrition
ProteinProtein
Triumph Professional is a pelleted complete feed formulated for a variety of life stages. It provides 14% protein, 8% fat and 17% NSC.
Triumph Professional Pellet Horse Feed (Nutrena)
Complete FeedComplete Feed
FiberFiber
MuscleMuscle
NutritionNutrition
Triumph Professional is a pelleted complete feed that provides 14% protein, 8% fat and less than 17% NSC. It is formulated for a large variety of horses such as broodmares, foals, performance horses, and horses at maintenance.
Triumph Professional Textured 14% Horse Feed (Nutrena)
DigestionDigestion
HealthHealth
Hoof HealthHoof Health
ToplineTopline
Triumph Professional Textured Horse Feed is a concentrate feed for horses of all ages and work levels. It supplies 14% crude protein, 8% crude fat, and 33% sugar and starch.
Triumph Senior Horse Feed (Nutrena)
Complete FeedComplete Feed
Gut HealthGut Health
SeniorSenior
ToplineTopline
Triumph® Senior Horse Feed is a complete feed intended for older horses providing 14% protein, 7% fat and 21% NSC (sugar and starch).
Tru Breed (Hygain)
AntioxidantAntioxidant
BroodmareBroodmare
DigestionDigestion
GrowthGrowth
Tru Breed by Hygain is a soy-free extruded feed intended for breeding and growing horses.
Tru Care (Hygain)
DigestionDigestion
NutrientsNutrients
NutritionNutrition
SeniorSenior
Tru Care from Hygain is an extruded feed intended for horses requiring extra calories, such as senior horses. Tru Care contains glucosamine intended to support joint health.
Tru Gain (Hygain)
Competition HorsesCompetition Horses
HealthHealth
NutritionNutrition
Weight IssuesWeight Issues
Tru Gain is an extruded fat supplement for horses. This pelleted supplement contains added vitamin E and selenium. Tru Gain is intended for performance horses and horses who require additional calories.
Turbo Mag BCAA (Stride Animal Health)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
ExerciseExercise
HealthHealth
Turbo Mag BCAA from Stride Animal Health is a powdered electrolyte for horses. Turbo Mag BCAA is intended to support hydration levels and replace lost electrolytes.
Tye-Cal Max (Basic Equine Nutrition)
HealthHealth
Mineral BalanceMineral Balance
MuscleMuscle
VitaminsVitamins
Tye-Cal Max from Basic Equine Nutrition is an additive that is meant to assist in the relaxation of muscles in horses and to help prevent tying-up. It is a powdered supplement containing calcium, vitamins, and other minerals.
U-Balance Foundation (Uckele)
FiberFiber
Mineral BalanceMineral Balance
ProteinProtein
VitaminsVitamins
Uckele U-Balance Foundation is a pelleted vitamin, mineral, and amino acid supplement for horses. It is intended to balance the diet without adding significant calories. This supplement can also supports sugar metabolism.
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 FINISH 25 (BUCKEYE Nutrition)
FatFat
Omega 3-6-9Omega 3-6-9
Skin + HairSkin + Hair
Weight IssuesWeight Issues
Ultimate Finish 25 is a high-fat (25%) supplement intended for use as a top-dressing to add energy to the diet for working horses or horses that need to gain weight gain. It is formulated with soybeans, flaxseed, and rice bran.
Ultimate Recovery (Buckeye)
Amino AcidAmino Acid
Competition HorsesCompetition Horses
ExerciseExercise
RecoveryRecovery
Buckeye Ultimate Recovery is an extruded performance horse supplement containing added fats and branched-chain amino acids to support muscle and tissue recovery. This supplement also contains electrolytes to aid in rehydration.
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 Dynamix (Seminole)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
Organic Trace MineralsOrganic Trace Minerals
ProteinProtein
Seminole Ultra Dynamix™ is a high-calorie pelleted horse feed for growing, breeding and performance horses. It contains oats, corn, digestible fibers, soybean oil and stabilized rice bran.
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 Antioxidant (Santa Cruz Animal Health)
AntioxidantAntioxidant
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
UltraCruz Equine Antioxidant is a pelleted vitamin and mineral supplement for horses. It provides the antioxidants selenium, vitamin C and vitamin E to potentially protect cells from oxidative damage.
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.

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