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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.
E-Clipse’PM Pellets (MVP)
AntioxidantAntioxidant
ImmunityImmunity
StressStress
VitaminsVitamins
E-Clipse'PM Pellets by MVP is a supplement for horses that provides antioxidants. It contains B vitamins that intend to help support normal neurological function.
E-SE-MAG Pellets (MVP)
AntioxidantAntioxidant
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
E-SE-MAG Pellets by MVP is a supplement for horses that contains vitamin E, selenium and magnesium. It intends to support efficient muscle function and manage exercise-associated muscle discomfort.
E-TEC Balancer (Poulin Grain)
Gut HealthGut Health
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
Ration BalancerRation Balancer
E-TEC Balancer is a ration balancer pellet for horses consuming unfortified grains or forage-only diets. It is intended for horses at different stages including performance, growing, breeding and metabolic horses.
E-TEC Carb Safe (Poulin Grain)
Complete FeedComplete Feed
Hoof HealthHoof Health
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Poulin Grain E-TEC® Carb Safe is a pelleted feed intended for horses that require lower sugar and starch content in their diet. It provides a maximum 5.5% NSC and can fed to overweight horses or those with metabolic concerns.
E-TEC Fibre-Max (Poulin Grain)
FatFat
FiberFiber
PerformancePerformance
ToplineTopline
E-TEC® Fibre-Max is a high fat (14%) and high fibre (20%) feed for performance horses that require higher calorie intakes. It provides 9.3% sugar and 7.4% starch for a total NSC of 16.7%.
E-TEC One (Poulin Grain)
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
YeastYeast
E-TEC One by Poulin Grain is a grain-free feed intended for all classes of horses and ponies. It provides 14% protein, 8% fat, and 18% fiber.
E-TEC Senior Low Carb (Poulin Grain)
FiberFiber
NutritionNutrition
SeniorSenior
Weight IssuesWeight Issues
E-TEC Senior Low Carb by Poulin Grain is a pelleted, grain- and molasses-free feed intended for senior horses that need to avoid sugars and starches. It contains 9.3% starch and 5% sugar.
E-TEC Senior Low Carb Complete (Poulin Grain)
DigestionDigestion
Grain FreeGrain Free
HealthHealth
SeniorSenior
E-TEC Senior Low Carb Complete from Poulin Grain is a senior feed that is grain and molasses free. It is meant for horses with problems chewing or hard keepers.
Easy 8 Horse Pellet (Thomas Moore Feed)
FatFat
FiberFiber
Mineral BalanceMineral Balance
NutrientsNutrients
Easy 8 Horse Pellet from Thomas Moore Feed is a pelleted feed intended for mature horses. It contains 12% protein, 8% fat, 17% fiber, and contains vitamins and minerals.
Easy Keeper (Woody’s Horse Nutrition)
Easy KeeperEasy Keeper
FiberFiber
MetabolismMetabolism
Weight IssuesWeight Issues
Woody’s Easy Keeper is a complete pelleted feed with lower energy density intended for horses at maintenance or horses that need to lose weight. It contains 10.5% NSC and 5% fat.
Econo Creep Pellets (West Feeds)
FiberFiber
Mineral BalanceMineral Balance
ProteinProtein
VitaminsVitamins
Econo Creep Pellets by West Feeds is an all livestock feed meant to support maintenance, with 14% protein and a moderate level of fibre of 18%. This feed includes ingredients such as grain products, roughage products, and inorganic vitamins and minerals.
ecube Complete Senior (Blue Seal)
FiberFiber
ForageForage
Mineral BalanceMineral Balance
VitaminsVitamins
ēcube Complete Senior is a complete horse feed in a large cube format. It is formulated with alfalfa and grass hays and provides less than 10% NSC. It is intended for mature horses but can be suitable for horses of all life stages.
Edge 14 (Hallway)
EnergyEnergy
FatFat
FiberFiber
NutritionNutrition
Edge 14 from Hallway is a feed fortified with Stamm 30, providing 14% protein, and 6% fat. This feed provides energy from digestible fibres and vegetable oil.
Eeze (Brooks Feeds)
Caloric EnergyCaloric Energy
FiberFiber
NutritionNutrition
PerformancePerformance
Eeze by Brooks Feeds is a textured feed for performance horses active in high-intensity disciplines requiring a reduced carbohydrate level. It draws energy primarily from digestible fibres and fats, including rice bran.
Eeze Pro-Plus (Brooks Feeds)
Complete FeedComplete Feed
FiberFiber
Low NSC FeedsLow NSC Feeds
PerformancePerformance
Eeze Pro-Plus is a calorie dense textured feed that is high fibre and fat for performance horses with a reduced carbohydrate level. Lab analysis provides a calculated NSC value of ~19%.
Eezy Mix (Dunstan)
Complete FeedComplete Feed
EnergyEnergy
ExerciseExercise
PerformancePerformance
Eezy Mix by Dunstan is an extruded cereal and protein-based complete feed intended to provide medium energy to all sport and leisure horses.
Electrovits (Herbs for Horses)
ElectrolyteElectrolyte
HydrationHydration
StaminaStamina
VitaminsVitamins
Herbs for Horses Electrovits is an electrolyte supplement containing B-Complex vitamins. It is important to replenish electrolyte minerals such as sodium, chloride, potassium and magnesium following exercise.
Element (Equis Feed)
Caloric EnergyCaloric Energy
GrainsGrains
Mineral BalanceMineral Balance
VitaminsVitamins
Element by Equis Feeds is a high-protein and moderate-fat horse feed that has 15.6% NSC. It contains Zinpro®4-Plex EQ performance trace minerals, prebiotic fibre, beet pulp, and soybean hulls.
Element (Stride Animal Health) – [Discontinued]
ElectrolyteElectrolyte
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Element from Stride Animal Health is a mineral supplement that can assist with the general health of horses. It contains vitamins, minerals, and electrolytes.
Elevate Se (Kentucky Performance Products)
AntioxidantAntioxidant
ImmunityImmunity
MuscleMuscle
VitaminsVitamins
KPP's Elevate Se is an equine antioxidant supplement providing natural Vitamin E and organic selenized yeast. One scoop provides 1 mg of organic selenium and 1500 IU Vitamin E.
Elite 300 (Pryde’s EasiFeed)
Mineral BalanceMineral Balance
NutrientsNutrients
ProbioticProbiotic
VitaminsVitamins
Elite 300 by Pryde's EasiFeed is a pelleted vitamin and mineral supplement intended for all horse types.
Elite Competitor Horse Feed (New Country Organics)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
PerformancePerformance
StressStress
Elite Competitor Horse Feed by New Country Organics is a textured feed containing oats, peas, alfalfa pellets, sunflower meal, kelp, and probiotics. It is intended for horses that require higher energy and protein.
Elite Performance (Equine Advantage)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
Competition HorsesCompetition Horses
PerformancePerformance
Elite Performance by Equine Advantage is designed for performance horses. This textured feed provides energy from starch and fat sources, with higher levels of biotin and Lysine.
Elite Ration (Hoffman’s Horse Products)
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Weight IssuesWeight Issues
Hoffman's Elite Horse Ration is a feed intended for horses in moderate to heavy work, or hard keepers. This feed contains flax, rice bran, and vegetable oils for energy, providing 15.5% NSC and 8% fat.
Empower Boost Horse Supplement (Nutrena)
ExerciseExercise
FatFat
PerformancePerformance
Weight IssuesWeight Issues
Empower Boost is a supplement high in fat and calorie-dense intended for performance horses and hard keepers. It is ideal for gut health as prebiotics and probiotics have been added. This supplement can also be beneficial for horses prone to tying up.
Empower Digestive Balance (Nutrena)
DigestionDigestion
Gut HealthGut Health
UlcersUlcers
Weight IssuesWeight Issues
Nutrena Empower Digestive Balance is a pelleted horse supplement that can be top-dressed on feed to support gastrointestinal health. It is formulated with added calcium to buffer gastric pH.
Empower® Topline Balance® Ration Balancer (Nutrena)
Amino AcidAmino Acid
Grain FreeGrain Free
Ration BalancerRation Balancer
ToplineTopline
Nutrena Empower® Topline Balance® is a concentrated ration balancer to support topline and provide common nutrients lacking in forage. It contains 30% crude protein with added limiting amino acids.
Encompass (Hallway)
Mineral BalanceMineral Balance
NutritionNutrition
ProteinProtein
VitaminsVitamins
Encompass from Hallway Feeds is a cubed ration balancer for horses. It provides vitamins, minerals and 25% protein without significant caloric supplementation.
Endurance 10 (Banks Mill Feeds)
FiberFiber
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Endurance 10 is a pelleted feed with no corn intended for mature horses and ponies. Energy sources include wheat middling, soybean hulls, cane molasses, and alfalfa meal.
Endurance 14 (Havens Horsefeed)
MuscleMuscle
NutritionNutrition
PerformancePerformance
StaminaStamina
Endurance 14 is a high-energy feed targeting endurance horses. It contains grains, oils, and antioxidants to support performance. This feed supports gastrointestinal health, muscle development and repair, and the nervous system.
Endurix (Cavalor)
EnergyEnergy
ElectrolyteElectrolyte
FatFat
PerformancePerformance
Cavalor Endurix is a feed mix meant for sport performance horses. It is a source of energy, pre- and probiotics, fat, vitamins and minerals.
Energized Maintenance (Bluebonnet Feeds)
Complete FeedComplete Feed
GrainsGrains
Mineral BalanceMineral Balance
VitaminsVitamins
Energized Maintenance from Bluebonnet Feeds is a pelleted feed intended for maintenance horses at all life stages. This feed contains 14% crude protein, 5% crude fat, and 12% crude fibre.
Energized Performance (Bluebonnet Feeds)
GrainsGrains
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Energized Performance from Bluebonnet Feeds is a pelleted feed intended for performance horses with higher energy requirements. This feed contains 12% crude protein, 9% crude fat, and 13% crude fibre.
Energized Textured (Blue Bonnet Feeds)
GrainsGrains
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Energized Textured from Bluebonnet Feeds is a sweet texturized feed intended for adult horses at maintenance. It provides 10% crude protein, 4% crude fat, and 12% crude fibre.
Engage Cool Calorie Base (Pink Rose Organix)
Complete FeedComplete Feed
Easy KeeperEasy Keeper
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
Engage Cool Calorie Base by Pink Rose Organix is a complete feed designed for adult horses in light to moderate work. It is classified as a low NSC feed and suitable for easy keepers.
Enhance 0.5 (Technique)
Complete FeedComplete Feed
HealthHealth
NutrientsNutrients
NutritionNutrition
Enhance 0.5 by Technique is a non-soy pelleted feed intended to meet the nutritional needs of all horse types.
Enhancer (Brooks Feeds)
Metabolic SyndromeMetabolic Syndrome
Organic Trace MineralsOrganic Trace Minerals
Ration BalancerRation Balancer
VitaminsVitamins
Brooks Enhancer is a low-calorie pelleted ration balancer formulated to provide vitamins and minerals required in the equine diet. It contains a mix of organic and inorganic minerals and has a low NSC content ideal for horses prone to laminitis.
Enrich Plus Ration Balancing Concentrate (Purina)
Easy KeeperEasy Keeper
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
Purina Enrich Plus Ration Balancing is a concentrated, pelleted formula intended for easy keepers, growing horses, breeding stallions, and early gestation mares. It contains 32% crude protein and 15% NSC.
Enrich Plus Senior (Purina)
Complete FeedComplete Feed
DentalDental
FiberFiber
SeniorSenior
Enrich Plus Senior Ration Balancing Horse Feed by Purina is a complete pelleted feed intended for senior horses. It is to be fed in addition to forage.
Enrichment (Excel Equine)
DigestionDigestion
HealthHealth
Metabolic SyndromeMetabolic Syndrome
SeniorSenior
Enrichment by Excel Equine is a specially formulated pelleted feed designed for senior horses with chronic health conditions. It contains 26% protein, 6% fiber, and 3% fat to support their unique nutritional needs.
Eq-Well (Arenus Animal Health)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
NutritionNutrition
Eq-Well by Arenus Animal Health is an equine vitamin and mineral balancer. It is a granular supplement intended for horses of all ages and work levels.
EQ16 Texturized (Masterfeeds)
BroodmareBroodmare
Complete FeedComplete Feed
FoalFoal
LactationLactation
Masterfeeds EQ16 Texturized is a high-calorie textured horse feed targeted to growing yearlings and pregnant or lactating mares. It provides 16% protein in a grain mix with added molasses for palatability.
EQ8 Gut Health (Buckeye)
DigestionDigestion
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
EQ8 Gut Health is a textured feed intended for horses in maintenance to moderate exercise. This feed provides 20% NSC and contains calcium, prebiotics, probiotics and yeast to support digestive health.
EQ8 Performance Gut Health (Buckeye)
DigestionDigestion
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
EQ8 Performance Gut Health is a calorie-dense extruded feed for active horses. This feed contains 20% NSC, 14% protein and 12% fat. It provides calcium, probiotics and yeast to support digestive health.
EQ8 Senior Gut Health (Buckeye)
DigestionDigestion
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
EQ8 Senior Gut Health is a multi-textured feed formulated for geriatric horses. It provides 14% protein, 10% fat and 20% NSC. It contains calcium, prebiotics, probiotics and yeast to support digestive health.
Eqceed 14 (Tucker Milling)
Complete FeedComplete Feed
FiberFiber
HealthHealth
NutritionNutrition
Eqceed 14 by Tucker Milling is a pelleted complete feed that contains 8% fat. It is formulated for working and maintenance horses and is marketed as a low starch feed.
Eqceed Ultra Senior (Tucker Milling)
Complete FeedComplete Feed
Gut HealthGut Health
Metabolic SyndromeMetabolic Syndrome
SeniorSenior
Eqceed Ultra Senior by Tucker Milling is a textured, high-fat, low-starch feed formulated specifically for senior horses. It includes shredded beet pulp and Lactobacillus, which supports gut health, and it can served as a complete replacement for hay or pasture.
Equalizer (Seminole)
Amino AcidAmino Acid
Competition HorsesCompetition Horses
Mineral BalanceMineral Balance
VitaminsVitamins
Seminole Equalizer is a high-protein pelleted ration balancer. It contains supplemental amino acids, a blend of organic and inorganic minerals, and added vitamins.
Equerry’s Choice (Equerry’s Horse)
DigestionDigestion
Mineral BalanceMineral Balance
ProbioticProbiotic
VitaminsVitamins
Equerry's Choice is a micro-encapsulated blend of probiotics and digestive enzymes. It also contains minerals and vitamins including organic selenium. This supplement is recommended for all horses and ponies at any work level.
Equerry’s Economy Supplement
DigestionDigestion
FiberFiber
Mineral BalanceMineral Balance
ProteinProtein
Equerry's Economy Supplement is an alfalfa, wheat and oat-based gut health supplement for horses containing microencapsulated probiotics, digestive enzymes, vitamins, and minerals.

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