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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.
Pastime (McCauley’s Equine Formulas)
Feed EfficiencyFeed Efficiency
HealthHealth
NutritionNutrition
Ration BalancerRation Balancer
Pastime is an oat-based pelleted feed for adult horses at maintenance or in light work. It targets pleasure horses with lower energy density and fat content.
Pasture Lick (DAC)
HealthHealth
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Pasture Lick by DAC is a vitamin and mineral supplement lick for mature horses. It is formulated with Vitamin E, biotin, and yeast.
Patriot Pellet (Masterfeeds)
Easy KeeperEasy Keeper
MuscleMuscle
ProteinProtein
Ration BalancerRation Balancer
Masterfeeds Patriot Pellet is a complete pelleted feed intended for horses at maintenance or in moderate work. The pellets are fortified with minerals and vitamins and provide high protein (14%) and low fat (4.5%).
PegaVite (Equestrizone)
IngredientIngredient
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
PegaVite from Equestrizone provides essential daily vitamins and minerals to balance equine diets. It provides ingredients such as calcium carbonate and monocalcium phosphate that forage and concentrate grains may be lacking.
Pennwoods 13 to 36 Advanced (Pennwoods Equine)
FatFat
FoalFoal
GrowthGrowth
ProteinProtein
Pennwods 13 to 36 Advanced is a growth and performance supplement targeted to yearling and two-year-old horses. It contains a blend of proteins, fats, vitamins, and minerals.
Perfectly Senior Horse Summer Pellet (Kruse’s Perfection Brand)
FiberFiber
GrainsGrains
JointsJoints
SeniorSenior
Perfectly Senior Horse Summer Pellet by Kruse's Perfection Brand is a pelleted feed that is intended to be fed to senior maintenance, performance, and breeding horses. This feed is meant to be fed as a complete feed or supplemented with hay or pasture equivalent.
Perfectly Senior Horse Winter Pellet (Kruse’s Perfection Brand)
BroodmareBroodmare
Complete FeedComplete Feed
PerformancePerformance
SeniorSenior
Perfectly Senior Horse Winter Pellet by Kruse's Perfection Brand is a feed that intends to be fed to senior maintenance, performance, and breeding horses either as a complete feed or supplemented with hay or pasture equivalent.
Perfo EXT (Sollio Agriculture)
Competition HorsesCompetition Horses
HealthHealth
NutritionNutrition
Weight IssuesWeight Issues
Perfo EXT is a high-calorie extruded feed. This feed is intended for performance horses or horses who require additional calories.
Perfomix (Cavalor)
Complete FeedComplete Feed
Mineral BalanceMineral Balance
ProteinProtein
VitaminsVitamins
Cavalor Perfomix is a complete textured feed intended for active recreational and competition horses. It provides 11.5% protein and 4% fat from ingredients such as oats, wheat middlings, barley and soy hulls.
Perform Gold (Triple Crown)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
FatFat
FiberFiber
Perform Gold is a high energy density pelleted feed designed for performance horses. It provides 12.5% protein, 12% fat and 15.3% NSC, and contains a mixture of organic and inorganic minerals.
Perform Safe (Seminole)
Complete FeedComplete Feed
EnergyEnergy
Low NSC FeedsLow NSC Feeds
PerformancePerformance
Perform Safe™ is a low-starch, high-fat pelleted feed targeted to growing, breeding and mature performance horses. It contains 12% protein and 8% fat with energy sources such as soybean hulls, beet pulp and rice bran.
Performance (Equis Feed)
GrainsGrains
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Equis Feeds Performance is a high-protein complete feed intended for working horses. It is formulated with oil and grains with highly digestible vitamins, minerals, and digestive aids to provide higher energy density.
Performance 12 (Excel Equine Feeds)
ExerciseExercise
HealthHealth
NutritionNutrition
PerformancePerformance
Performance 12 is a textured feed from Excel Equine Feeds. This feed contains fat sources and digestible fibre intended to support the needs of performance horses.
Performance Advantage (Tribute Equine)
EnergyEnergy
FatFat
FoalFoal
PerformancePerformance
Tribute Performance Advantage® is a grain-based, textured feed formulated to meet the higher energy requirements of performance horses. It provides 8% fat and 31% NSC.
Performance Equine Mineral and Vitamin Formulation (Wild Gold)
ElectrolyteElectrolyte
Mineral BalanceMineral Balance
ProbioticProbiotic
VitaminsVitamins
Performance Equine Mineral and Vitamin Formulation by Wild Gold is a premixed supplement that is intended to provide vitamins, minerals, and probiotics to support optimal nutrient absorption.
Performance Horse (New Country Organics)
HindgutHindgut
NutritionNutrition
PerformancePerformance
YeastYeast
Performance Horse by New Country Organics is a textured supplement intended for maintenance diets for horses with moderate energy demands. It contains a mixture of oats, peas, barley, alfalfa pellets, kelp, and probiotics.
Performance Horsepower (ProHeritage Feeds)
FatFat
NutrientsNutrients
PerformancePerformance
YeastYeast
Performance Horsepower from ProHeritage Feeds is a feed that is high in fat and it is intended for working and performance horses. It also contains vitamins, minerals, and yeast.
Performance Pelleted (Woody’s Horse Nutrition)
Competition HorsesCompetition Horses
FatFat
PerformancePerformance
ProteinProtein
Woody’s Performance Pelleted is a complete pelleted feed with higher energy density for working horses. It is formulated with beet pulp, alfalfa meal and oats, and contains 14% protein and 8% fat.
Performance Plus 606 Pellets (Ace Hi Feeds)
Caloric EnergyCaloric Energy
NutritionNutrition
PerformancePerformance
ProteinProtein
Performance Plus 606 by Ace Hi Feeds is intended for horses with higher energy needs including growing and performance horses. It contains barley, wheat bran, and canola oil as energy sources.
Performance Textured (ProElite)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
PerformancePerformance
StaminaStamina
ProElite Performance Horse Feed is a textured feed intended for mature show and performance horses. It provides 12% fat and 18.3% NSC with energy sources including beet pulp, whole oats, wheat middlings, soybean hulls, and cane molasses.
Performance Textured (Woody’s Horse Nutrition)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
FatFat
ProteinProtein
Woody’s Performance Textured is a complete textured feed for exercising and performance horses. It provides 14% protein and 10% fat and is composed of oats, beet pulp, molasses and vegetable oil.
Phase I – Pelleted (Brooks)
EnergyEnergy
FoalFoal
GrowthGrowth
NutritionNutrition
Phase I - Pelleted is intended for growing horses. Phase I is intended to promote and support growth. This feed contains barley and corn.
Phase V (Brooks Feeds)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
Competition HorsesCompetition Horses
PerformancePerformance
Brooks Phase V is a pelleted or textured feed intended for performance equine athletes. It provides 8% fat and 15% fibre with energy sources including oats, wheat shorts, soybeans, barley, alfalfa meal, and molasses.
Physique (Equi-lete)
Bone HealthBone Health
EnergyEnergy
HealthHealth
Mineral BalanceMineral Balance
UlcersUlcers
Physique by Equi-lete is a pelleted supplement intended to support bone and tissue health in all horse types.
Plantation 10 All-Grain (Seminole) – [Discontinued]
Complete FeedComplete Feed
GrainsGrains
NutrientsNutrients
SeniorSenior
Seminole Plantation 10 All Grain is a now-discontinued textured horse feed based on oats. It was targeted to mature horses and provided 10% protein and 4% fat.
Platinum Performance® Equine Wellness and Performance Formula
EnergyEnergy
FatFat
JointsJoints
Omega 3-6-9Omega 3-6-9
Platinum Performance® Equine Wellness and Performance Formula is a nutritional supplement containing ground flaxseed, stabilized rice bran, montmorillonite (bentonite) clay and a range of vitamins and minerals.
Pleasure Sweet (Buckeye)
Complete FeedComplete Feed
DigestionDigestion
NutritionNutrition
SeniorSenior
Pleasure Sweet is a multi-particle sweet feed with added molasses to improve palatability. This feed supports digestibility and is intended for mature maintenance or lightly worked horses.
Podium Cool Energy – Pellet (Masterfeeds)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
PerformancePerformance
UlcersUlcers
Podium Cool Energy is a controlled NSC performance feed that utilizes energy from carbohydrates and moderate levels of fat and protein. It is targeted at standardbred racehorses, eventers, and other equine athletes.
Post Time (McCauley’s Equine Formulas)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Post Time® is a highly palatable textured horse feed providing high digestible energy levels for performance horses. It provides 8% crude fat from vegetable oil, 12% protein, and 11% crude fiber.
Power Finish (Tribute)
Complete FeedComplete Feed
EnergyEnergy
ExerciseExercise
PerformancePerformance
Tribute Power Finish is a high-fat textured feed intended for adult horses in heavy training. It provides highly digestible energy sources to support the calorie requirements of racehorses. Power Finish contains high levels of protein (13% crude protein), fat (10% crude fat), and NSC (32%).
Precision (Ark Nutrition)
Amino AcidAmino Acid
FatFat
GrowthGrowth
ToplineTopline
Precision by Ark Nutrition is a pelleted feed that is low in sugar with a moderate starch level meant to ease digestion and is higher in soluble fiber levels to support hindgut function.
Premium Blend Wheat Germ Oil (AniMed)
AntioxidantAntioxidant
Coat QualityCoat Quality
EnergyEnergy
VitaminsVitamins
Premium Blend Wheat Germ Oil from AniMed is a source of vitamin E, antioxidants, and can help with body conditioning and coat quality. It also contains energy and fat.
Premium Horse Pellet AL (Cargill)
DigestionDigestion
ExerciseExercise
NutrientsNutrients
NutritionNutrition
Premium Horse Pellets (AL) by Cargill are intended as a ration balancer for adult horses.
PreOx (HorseTech)
AntioxidantAntioxidant
HealthHealth
ImmunityImmunity
VitaminsVitamins
PreOx from HorseTech is a powdered antioxidant supplement. PreOx contains added vitamins, minerals and added flaxseed. This supplement is intended for horses who require additional antioxidants in their diet.
Prep 14 (Hallway)
Caloric EnergyCaloric Energy
Gut HealthGut Health
RecoveryRecovery
Weight IssuesWeight Issues
Prep 14 from Hallway is a fortified high-energy, fat, and fibre feed for horses with greater energy demands. Prep 14 contains 14% protein, 12.5% fibre, and 10% fat.
Pro Balance (Bluebonnet Feeds)
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
YeastYeast
Pro Balance by Bluebonnet is a comprehensive diet balancer formulated to correct vitamin and mineral deficiencies commonly found in forage-only diets for horses. It also includes yeast, probiotics, and digestive enzymes to support optimal gut health and nutrient absorption.
Pro-Plus 12 Sweet (Seminole) – [Discontinued]
Amino AcidAmino Acid
Complete FeedComplete Feed
ExerciseExercise
GrowthGrowth
Seminole Pro-Plus 12 Sweet is a now-discontinued oat-based textured feed for growing, breeding, pleasure and performance horses.
PRO-TECT LS (Dove Performance Nutrition)
HealthHealth
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
NutritionNutrition
PRO-TECT LS by Dove Performance Nutrition is a pelleted feed intended for all horse types.
Pro24 Supplement (Hoffman’s Horse Products)
Easy KeeperEasy Keeper
Feed EfficiencyFeed Efficiency
HealthHealth
NutritionNutrition
Pro24 Supplement from Hoffman's is a concentrated protein, vitamin, and mineral supplement to support horses over 1 year of age. Pro24 Supplement is intended to be fed with good quality forages and contains no added sugars or starches.
ProAdvantage – Alfalfa Formula (Progressive Nutrition)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
ProAdvantage® – Alfalfa Formula is a ration balancer concentrate intended for horses consuming alfalfa hay. This feed contains amino acids, vitamins, and minerals in a lower-starch format.
ProAdvantage – Grass Formula (Progressive Nutrition)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
ProAdvantage® – Grass Formula is a concentrated ration balancer intended for horses consuming grass or mixed hay. This feed contains amino acids, vitamins, and minerals in a lower-starch format.
ProBreed (Cavalor)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Cavalor ProBreed is a textured feed for pregnant and gestating mares, as well as foals under 1 year of age. It contains 16% protein from sources such as alfalfa, wheat middlings and soybeans.
Profecta 10 (Seminole)
Caloric EnergyCaloric Energy
Feed EfficiencyFeed Efficiency
GrainsGrains
YeastYeast
Seminole Profecta 10™ is a pelleted feed providing grains, digestible fibers, yeast and molasses with 21% NSC. It is targeted at active mature horses and ponies.
Profecta 12 (Seminole)
FiberFiber
GrainsGrains
Mineral BalanceMineral Balance
YeastYeast
Seminole Profecta 12 is a pelleted feed intended for mature, active horses and ponies. It has a moderate energy density, yeast culture, and 19% NSC (sugar and starch).
Profecta 14 (Seminole)
FiberFiber
GrainsGrains
Mineral BalanceMineral Balance
YeastYeast
Seminole Profecta 14 is a pelleted feed intended for growing, breeding and performance horses. It contains 14% protein, 7% fat and 24% NSC. This feed is fortified with chelated trace minerals and antioxidants.
ProForce Fuel (Nutrena)
Competition HorsesCompetition Horses
EnergyEnergy
ExerciseExercise
FatFat
Nutrena ProForce Fuel is a 13% fat horse feed intended for performance athletes and hard keepers. It is meant to provide a higher calorie density with a maximum of 20% NSC.
ProForce Fuel XF (Nutrena)
Competition HorsesCompetition Horses
EnergyEnergy
ExerciseExercise
FatFat
Nutrena ProForce® Fuel XF is a 13% fat horse feed formulated for high performance horses that need additional nutritional support to meet the demands of stress and rigorous training.
ProForce Senior (Nutrena)
EnergyEnergy
ExerciseExercise
FiberFiber
SeniorSenior
Nutrena ProForce Senior is an 11% fat horse feed intended for senior equine athletes. It contains energy from digestible fiber sources and extruded fat nuggets with a maximum of 18% NSC.
Proformance 14 (Excel Equine Feeds)
BroodmareBroodmare
HealthHealth
NutrientsNutrients
PerformancePerformance
Proformance 14 by Excel Equine Feeds is a fortified textured feed intended for broodmares, foals, weanlings, yearlings and performance horses.
Proformance Sales Prep (Excel Equine Feeds)
GrowthGrowth
HealthHealth
NutrientsNutrients
NutritionNutrition
Proformance Sales Prep by Excel Equine Feeds is a textured feed intended to keep growing horses in proper condition for sale day.

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