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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.
Fit & Fibre – Textured (Brooks Feeds)
Complete FeedComplete Feed
FatFat
FiberFiber
NutritionNutrition
Fit and Fibre is a high-fat and fibre textured feed from Brooks Performance Horse Feeds. This feed is meant to provide energy for horses in light to moderate work.
Foal & Weanling (McCauley’s Equine Formulas)
FoalFoal
GrowthGrowth
Gut HealthGut Health
HealthHealth
McCauley's Foal & Weanling is a pelleted feed for foals and growing horses. It is formulated to support gut development and to help transition foals from milk to feed.
Foal Foundation (Tribute Equine)
FoalFoal
GrowthGrowth
PrebioticPrebiotic
ProbioticProbiotic
Tribute Foal Foundation™ is a milk-based pellet for foals up to three months of age to supplement the nutrients provided in mare's milk. The smaller pellet size helps to transition the foal to solid feeds.
Foal Starter (Buckeye)
EnergyEnergy
FoalFoal
PrebioticPrebiotic
ProteinProtein
Buckeye Foal Starter is a milk-based pellet that can be used as a free-choice transition or creep feed for foals under three months of age. It provides digestible fibre and protein sources.
Formula 2 Equine Supplement (Dr. Reeds) – [Discontinued]
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Dr. Reeds Formula 2 is a now-discontinued vitamin/mineral supplement for horses with higher NSC content than Formula 1. This supplement used a combination of organic and inorganic trace minerals and contained wheat and molasses.
Formula E and Se (DAC)
HealthHealth
ImmunityImmunity
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Formula E and Se by DAC is a powdered vitamin and mineral supplement designed to support muscle and immune function. It is formulated with 1250 IU Vitamin E.
Fortifiant Liberte (Nature Belisle)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Fortifiant Liberte by Nature Belisle is a pelleted vitamin and mineral supplement. It is intended for horses and ponies of all ages and work levels.
Fortify (Dove Performance Nutrition)
Mineral BalanceMineral Balance
NutrientsNutrients
Ration BalancerRation Balancer
VitaminsVitamins
Fortify from Dove Performance Nutrition is a pelleted feed ration for horses. It contains vitamins, minerals, protein, fiber and fat.
Foundation Cube (Hallway Feeds)
FiberFiber
Hay StretcherHay Stretcher
NutritionNutrition
ProteinProtein
Foundation Cube by Hallway Feeds is a cubed feed intended for growing and mature horses. It is a fortified feed that can be fed in amounts up to 18 lbs (8 kg) per day
GastroBalance Plus (Enviro Equine)
AntioxidantAntioxidant
Gut HealthGut Health
Hoof HealthHoof Health
Organic Trace MineralsOrganic Trace Minerals
GastroBalance Plus by Enviro Equine is a gastrointestinal support supplement that includes Alltech-chelated organic trace minerals. It is intended to support overall GI tract function, the immune system, and general hoof and coat health in horses
GastroBalance Plus Paste (Enviro Equine)
Gut HealthGut Health
HealthHealth
PerformancePerformance
StressStress
GastroBalance Plus Paste by Enviro Equine is a gut health supplement intended to support horses during stress.
General Purpose Supplement (NAF Equine)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
General Purpose Supplement from NAF Equine is intended to be added to a forage-based diet to supply extra vitamins and minerals. This supplement is intended for all horses and ponies.
Generation (Equis Feed)
GrainsGrains
Gut HealthGut Health
NutritionNutrition
VitaminsVitamins
Generation from Equis Feed is intended for breeding stallions, mares in their last trimester and during lactation, and growing foals. This feed contains vitamins and minerals blended with protein, and fiber.
Genesis (Brooks)
BroodmareBroodmare
HealthHealth
NutrientsNutrients
VitaminsVitamins
Genesis by Brooks is a broodmare feed available in either textured or pelleted form. It is designed to meet the enhanced nutritional needs of mares before and after foaling, and it is marketed as having a low glycemic index.
Genesis Performance Plus (Organic Horse Feed)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Genesis™ Performance Plus is a certified organic horse feed intended for race horses, 3-day eventers, and equine athletes. It provides 6.75% fat, 13.75% protein and 8.8% fibre from organic oats, hulless barley, peas, and flax seed meal.
Gentle Balance (LMF Horse Feeds)
Grain FreeGrain Free
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
YeastYeast
Gentle Balance is a pelleted feed for horses that contains energy, vitamins, minerals, and yeast but does not contain grain or molasses. It is a low sugar feed that is meant for horses in light to moderate exercise.
Get Go (Elk Grove Milling) [Discontinued]
Bone HealthBone Health
BroodmareBroodmare
FoalFoal
GrowthGrowth
Get Go by Elk Grove Milling is a pelleted complete feed intended for broodmares, foals and weanlings up to 18 months.
GI (Platinum Performance)
DigestionDigestion
Gut HealthGut Health
ImmunityImmunity
PrebioticPrebiotic
Platinum Performance GI is a gut health supplement for mature horses. It is formulated with flax seed, probiotics, prebiotics, glutamine and other amino acids, toxin binders, vitamins and minerals.
Glanzen Lite Complete (HorseTech)
Easy KeeperEasy Keeper
FlavorFlavor
Hoof HealthHoof Health
Skin + HairSkin + Hair
Glanzen Lite Complete by HorseTech is a powdered supplement intended to support hoof, skin and coat health in easy-keepers and picky eaters.
Glycocemic EQ Pellets (Uckele Health & Nutrition)
CirculationCirculation
ImmunityImmunity
MetabolismMetabolism
Metabolic SyndromeMetabolic Syndrome
Uckele Glycocemic EQ is a pelleted horse supplement intended to support metabolic health. It contains magnesium, jiaogulan, chromium, taurine, l-carnitine, and other minerals and vitamins.
Gold Chance 10 (Seminole) – [Discontinued]
Complete FeedComplete Feed
ExerciseExercise
HealthHealth
PerformancePerformance
Seminole Gold Chance 10 is a now-discontinued horse feed that provided 10% crude protein, 6% fat and 9% fiber in a pelleted format.
Gold Chance 12+ (Seminole) – [Discontinued]
Complete FeedComplete Feed
ExerciseExercise
GrowthGrowth
ProteinProtein
Seminole Gold Chance 12+ is a now-discontinued horse feed that provided 12% crude protein with added lysine to support growth and performance.
Golden Age – Senior Horse Ration (Kelley’s Feed)
Caloric EnergyCaloric Energy
FiberFiber
NutritionNutrition
SeniorSenior
Kelley's Golden Age Senior is a pelleted feed containing fine ground alfalfa hay and pre-cooked extruded grain nuggets for mature and aged horses. It provides 14% protein, as well as added vitamins and minerals.
Golden Senior (Equis Feed)
Mineral BalanceMineral Balance
ProteinProtein
SeniorSenior
VitaminsVitamins
Equis® Golden Senior is a high-protein complete feed intended for senior horses. It contains wheat middlings, alfalfa, corn DDGS, beet pulp, ground oats, molasses, and canola oil.
Grade A Ultra 24 Milk Replacer (Sav-A-Caf)
FoalFoal
GrowthGrowth
NutritionNutrition
ProteinProtein
Ultra 24 by Sav-a-Caf is a multi-species milk replacer that can be given to foals and calves. It contains 24% fat and 24% protein from milk to support digestion and growth.
Grand Circuit (Masterfeeds)
Complete FeedComplete Feed
EnergyEnergy
ExerciseExercise
PerformancePerformance
Masterfeeds Grand Circuit (texturized) is intended for performance horses such as barrel racers, eventers, and racehorses. It provides higher energy density with 7% fat from soy oil and fat nuggets.
Grand Slam (Equi-lete)
Easy KeeperEasy Keeper
Gut HealthGut Health
HealthHealth
Ration BalancerRation Balancer
Grand Slam by Equi-lete is a pelleted ration balancer intended for easy keepers and horses on forage-based diets.
Grass Advantage (ProElite)
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
ProElite Grass Advantage is a pelleted ration balancer intended to balance grass and mixed forages. It can be fed to broodmares, growing, performance, and maintenance horses.
Grass Balancer (Dunstan)
Bone HealthBone Health
GrowthGrowth
Low NSC FeedsLow NSC Feeds
Mineral BalanceMineral Balance
Grass Balancer by Dunstan is a semi-concentrate feed that is intended to meet the nutrient requirements of growing horses without providing excess caloric intake.
Grass Balancer 16:8 Horse Mineral (Seminole)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Seminole Grass Balancer 16:8 is a granular mineral and vitamin supplement for horses fed grass hay or pasture. It contains inorganic minerals and molasses. It is meant to be provided free-choice or as a top dressing.
Grass Plus Vitamin & Mineral Block (BUCKEYE Nutrition)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Buckeye Grass Plus® Mineral & Vitamin Block is a free-choice mineral supplement intended for horses consuming grass forage. It contains inorganic minerals including calcium, phosphorus, magnesium and potassium.
GRO ‘N WIN Ration Balancer (BUCKEYE Nutrition)
Easy KeeperEasy Keeper
FiberFiber
Ration BalancerRation Balancer
ToplineTopline
Gro 'N Win is the original Buckeye Nutrition ration balancer that supplies minerals, vitamins and protein. It contains 13% NSC and 32% protein from sources such as soybean meal and alfalfa meal.
GRO ‘N WIN™ ALFA Ration Balancer (BUCKEYE Nutrition)
GrowthGrowth
HealthHealth
Ration BalancerRation Balancer
ToplineTopline
Gro 'N Win Alfa is a Buckeye ration balancer formulated with lower calcium to balance equine diets containing over 75% alfalfa hay. It is designed to provide minerals, vitamins, and proteins and has 18% NSC.
Gro-Fit (Ark Nutrition)
BroodmareBroodmare
Complete FeedComplete Feed
GrowthGrowth
LactationLactation
Gro-Fit by Ark Nutrition is a complete pelleted feed intended for growing horses, pregnant mares, lactating mares, and working horses. It contains various ingredients such as alfalfa meal, soyhulls, and wheat.
Grotorque (Hygain)
BroodmareBroodmare
Grain FreeGrain Free
GrowthGrowth
StallionStallion
Grotorque from Hygain is a textured feed that is intended to support breeding or growing horses. It is grain free and contains pre and probiotics. It is meant to aid in immunity, circulation, gut health, muscle health, and recovery.
Grow & Glo Juvenile (Meunerie Benjamin)
GrowthGrowth
NutrientsNutrients
PrebioticPrebiotic
ProteinProtein
Grow & Glo Juvenile by Meunerie Benjamin is a nutrient-rich cubed feed, expertly formulated to support the healthy growth and development of young horses from weaning up to two years old.
Growth (Equine Advantage)
FoalFoal
GrainsGrains
GrowthGrowth
Omega 3-6-9Omega 3-6-9
Growth is a textured feed formulated for young growing horses under 2 years old. This feed is highly palatable and provides moderate fibre levels from highly digestible sources including shredded beet pulp and soybean hulls.
Growth (Legends)
Complete FeedComplete Feed
FoalFoal
GrowthGrowth
LactationLactation
Legends Growth is a textured horse feed targeted to foals, growing horses, pregnant and lactating mares. It is formulated with higher amino acid content to support development.
Growth (Triple Crown)
FoalFoal
GrowthGrowth
LactationLactation
StallionStallion
Triple Crown Growth is a beet-pulp-based feed intended to support healthy growth and joints and meet the needs of broodmares and breeding stallions. It provides 10% fat and 15% crude fiber.
Growth Cubes (Tribute)
Bone HealthBone Health
DigestionDigestion
FatFat
FiberFiber
Tribute Growth Cubes are a cubed complete feed intended for growing horses between 3 months to 2 years and broodmares during gestation and lactation. Growth Cubes are high in protein (16%) and digestible fibre (18%).
Growth Pelleted (Woody’s Horse Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
NutritionNutrition
Woody's Growth Pelleted is a complete pelleted feed formulated for broodmares, foals, and growing horses. It contains added amino acids and chelated trace minerals. This feed contains a maximum of 15% crude fiber.
GROWTH Pelleted Horse Feed (BUCKEYE Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Buckeye GROWTH Pelleted Feed is a horse feed targeted to broodmares and growing horses. It provides higher levels of protein and added lysine.
Growth Pellets (Tribute)
FatFat
FiberFiber
GrowthGrowth
LactationLactation
Tribute Growth Pellet is a 15% NSC pelleted feed intended for broodmares during pregnancy and lactation and growing foals from 3 months to 2 years. It provides higher protein to support development.
Growth Textured (ProElite)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
ProElite Growth Horse Feed is a textured feed intended for foals, growing horses, and broodmares. It provides 16% protein to support development with a maximum NSC of 19.8%.
Growth Textured (Tribute)
Bone HealthBone Health
GrowthGrowth
LactationLactation
ProteinProtein
Tribute Growth Textured is a complete textured feed intended for broodmares during pregnancy and lactation as well as growing horses from 3 months to 2 years. It provides high protein levels which can support growth and is formulated for diets containing less than 50% legume forage.
Growth Textured (Woody’s Horse Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
NutritionNutrition
Woody’s Growth Textured is a complete textured feed formulated for broodmares, stallions, and growing horses. Omega-3 fatty acids is meant to help strengthen immune systems in both mare and foal.
GROWTH Textured Sweet Feed (BUCKEYE Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Growth Textured Sweet Feed by Buckeye is a complete feed designed for broodmares and growing horses. It provides fat, carbohydrates, and proteins from whole oats, soybean hulls, soybean oil and molasses. It contains 24% NSC.
Handimash (Hallway)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
ExerciseExercise
HydrationHydration
HandiMash from Hallway feeds is an electrolyte mash to increase fluid intake and replenish electrolytes lost after exercise or other stressful events. HandiMash is not intended to replace a daily feed regiment.
HaySaver (Hoffman’s Horse Products)
Gut HealthGut Health
Hay StretcherHay Stretcher
Low NSC FeedsLow NSC Feeds
NutritionNutrition
Hoffman's HaySaver is a cubed ration designed to be fed when hay quality is poor or good quality hay is limited. Hoffman's HaySaver has an NSC% of 20%, and uses both inorganic and organic trace minerals.
Head Start Plus Colostrum (Doctor’s Choice Supplements)
FoalFoal
GrowthGrowth
Mineral BalanceMineral Balance
VitaminsVitamins
Head Start Plus Colostrum is a foal supplement intended to provide vitamins, minerals, probiotics, prebiotics, and colostrum to help support immune function, gut health, and overall wellness.

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