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Organic Selenium - Feed Ingredient

Organic selenium refers to selenium that is bound to organic compounds, typically in the form of selenomethionine or selenized yeast. Unlike inorganic selenium sources such as sodium selenite or sodium selenate, organic selenium is more bioavailable and efficiently utilized by the horse’s body. It is also considered a safer source of selenium.

Selenium is an essential trace mineral required for antioxidant function, immune support, and muscle integrity. In equine diets, organic selenium is often preferred due to its higher absorption rate and incorporation into proteins, allowing for more sustained selenium availability compared to inorganic forms.

While essential for horses and necessary in diets where soils are selenium deficient, excessive selenium intake can be toxic. Selenium supplementation should be carefully managed to prevent toxicity while ensuring adequate intake for optimal health.

The following equine feeds, supplements and products contain Organic 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-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 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.
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 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.
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® 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.
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.
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.
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.
Equerry’s Plus
DigestionDigestion
Mineral BalanceMineral Balance
VitaminsVitamins
YeastYeast
Equerry's Plus is a horse supplement that provides microencapsulated probiotics and digestive enzymes. This product contains live yeast culture, chelated minerals, and vitamins. Equerry's Plus is intended for all horses and ponies.
Equi-Base Grass Pellets (Uckele)
HealthHealth
MetabolismMetabolism
NutrientsNutrients
Ration BalancerRation Balancer
Equi-Base Grass Pellet is a base mineral and vitamin supplement designed to balance diets based on grass hay/forage or a 50/50 alfalfa grass forage.
Equi-Base Senior (Uckele)
HealthHealth
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
Equi-Base Senior is a powdered vitamin, mineral and amino acid supplement formulated for senior horses. It contains ingredients which can support hoof, coat, immune and digestive function.
Equi-Eez (Purina)
HealthHealth
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
VitaminsVitamins
Equi-Eez is a concentrated mineral and vitamin supplement that does not contain fibre, fat or protein. It is fortified with biotin to support hoof health and coat quality.
Equi-Min Bits (Practical Equine Supplements)
FlavorFlavor
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
YeastYeast
Equi-Min Bits from Practical Equine Supplements is a vitamin and mineral pelleted supplement. It contains yeast cultures, organic trace minerals and is apple flavored.
EQUI-PRO East Coast Race (Poulin Grain)
GrainsGrains
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
EQUI-PRO East Coast Race by Poulin Grain is a textured feed intended for race horses. This feed provides high energy density from oats, beet pulp, corn, and molasses. It contains 13% protein, 8% fat, and 12% fiber.
EQUI-PRO Mare & Foal (Poulin Grain)
FoalFoal
GrowthGrowth
LactationLactation
MareMare
EQUI-PRO Mare & Foal by Poulin Grain is a textured feed intended for broodmares and growing horses. It provides 15% protein, 6% fat, and 10% fiber.
EQUI-PRO Performance Senior (Poulin Grain)
DigestionDigestion
PerformancePerformance
SeniorSenior
Weight IssuesWeight Issues
EQUI-PRO Senior Performance by Poulin Grain is a pelleted feed intended to provide digestive support and promote healthy weight in active senior horses.
EQUI-PRO PerforMAX (Poulin Grain)
Caloric EnergyCaloric Energy
GrainsGrains
VitaminsVitamins
Weight IssuesWeight Issues
EQUI-PRO PerforMAX by Poulin Grain is a textured feed intended for performance horses requiring high energy density. It contains 12% protein, 12% fat and 12% fiber.
EQUI-PRO Premium Senior (Poulin Grain) – [Discontinued]
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
Weight IssuesWeight Issues
EQUI-PRO Premium Senior by Poulin Grain is a pelleted feed intended for senior horses with digestive issues. It provides 14% protein, 6% fat, and 18% fiber.
EQUI-PRO ProMax (Poulin Grain)
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Weight IssuesWeight Issues
EQUI-PRO ProMax by Poulin Grain is a pelleted feed formulated for performance horses and hard-keepers. It provides a higher energy density and contains 12% protein, 12% fat and 12% fiber.
Equi-VM (Uckele)
HealthHealth
NutrientsNutrients
ProbioticProbiotic
Ration BalancerRation Balancer
Equi-VM is a powdered vitamin and trace mineral supplement from Uckele Health & Nutrition. It also contains probiotics and digestive enzymes.
Equi22 (Purina)
HealthHealth
Hoof HealthHoof Health
NutrientsNutrients
Ration BalancerRation Balancer
Purina Equi22 is a concentrated vitamin and mineral supplement in a pelleted format. It is designed to meet the needs of a wide range of horses.
EquiBalance (Sollio Agriculture)
Amino AcidAmino Acid
HealthHealth
Low NSC FeedsLow NSC Feeds
VitaminsVitamins
EquiBalance is a concentrated pelleted vitamin, mineral and amino acid supplement for horses. EquiBalance is intended for horses who are receiving a complete feed. This supplement is intended for horses with metabolic disorders.
Equibility (Hallway)
Complete FeedComplete Feed
ExerciseExercise
FatFat
FiberFiber
Equibility from Hallway is a pelleted feed fortified with Stamm 30 formulated for active adult horses. This feed uses energy from digestible fibres and vegetable oil, providing 12% protein, 8% fat, and 15% fibre.
EquiComplete (Sollio Agriculture)
DentalDental
HealthHealth
NutritionNutrition
SeniorSenior
EquiComplete from Sollio Agriculture is a pelleted feed intended for senior horses or horses with dentition issues. This feed contains 12% crude protein and 2% fat.
EquiForce E+ (Havens Horsefeed)
Amino AcidAmino Acid
AntioxidantAntioxidant
NutrientsNutrients
VitaminsVitamins
EquiForce E+ by Havens Horsefeed is a vitamin and mineral supplement intended for performance horses. It contains natural vitamin E, selenium, and amino acids. This supplement supports the immune system, muscles, and nervous system.

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