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Selenium Yeast - Feed Ingredient

Selenium yeast is an organic form of selenium produced by fermenting yeast (Saccharomyces cerevisiae) in a selenium-enriched medium. During fermentation, the yeast incorporates selenium into amino acids which is the most bioavailable form of selenium for animals. Selenium yeast is commonly used in livestock and equine nutrition to support antioxidant function, immune health, and proper muscle function.

Compared to inorganic sources like sodium selenite, selenium yeast is more efficiently absorbed and retained in tissues, leading to improved selenium status in the body. Selenium yeast is also considered safer than selenium salts, as it has a lower risk of toxicity.

Selenium is an essential trace mineral required for the activity of glutathione peroxidase, an enzyme that protects cells from oxidative damage. Horses and other animals depend on dietary selenium because they cannot synthesize it internally.

In horses, selenium deficiency can lead to muscle weakness, poor immune response, and white muscle disease in foals. However, excessive selenium intake can be toxic, causing symptoms such as hoof cracking, hair loss, and neurological issues.

The following equine feeds, supplements and products contain Selenium Yeast 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.
Decade Challenger – Super Bites (Poulin Grain)
Caloric EnergyCaloric Energy
GrainsGrains
MareMare
PerformancePerformance
Decade Challenger - Super Bites by Poulin Grain is a large-format pelleted feed intended for performance horses and broodmares. It provides 14% protein, 8% fat, and 10% fiber.
Decade Challenger (Poulin Grain)
Caloric EnergyCaloric Energy
GrainsGrains
MareMare
PerformancePerformance
Decade Challenger by Poulin Grain is a pelleted feed for performance horses and broodmares. It provides 14% protein, 8% fat and 10% fiber.
Decade Complete Diet (Poulin Grain)
Complete FeedComplete Feed
FiberFiber
NutrientsNutrients
Weight IssuesWeight Issues
Decade Complete Diet by Poulin Grain is a high-fiber complete pelleted feed intended for horses in light work. It provides 13% protein, 3% fat, and 17.5% fiber.
Decade Endurance Sport (Poulin Grain)
Complete FeedComplete Feed
GrainsGrains
Mineral BalanceMineral Balance
VitaminsVitamins
Decade Endurance Sport by Poulin Grain is a pelleted feed intended for horses in light-moderate work. It provides 12% protein, 8% fat, and 10% fiber.
Decade Race Formula (Poulin Grain)
Complete FeedComplete Feed
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Decade Race Formula by Poulin Grain is a high-calorie, high-protein textured feed intended for race horses. It provides 13% protein, 7% fat, and 9.5% fiber.
Decade Sprint Extreme (Poulin Grain)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
Mineral BalanceMineral Balance
VitaminsVitamins
Decade Sprint Extreme by Poulin Grain is a textured feed for performance horses and broodmares. It provides 13% protein, 8% fat and 10% fiber.
Decade Stable Sweet Tradition (Poulin Grain)
Complete FeedComplete Feed
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Decade Stable Sweet Tradition by Poulin Grain is a textured feed intended for mature active horses. It provides 13% protein, 6% fat, and 15% fiber.
Diamond Balancer (Triple Crown)
Easy KeeperEasy Keeper
Grain FreeGrain Free
Metabolic SyndromeMetabolic Syndrome
NutrientsNutrients
Diamond Balancer by Triple Crown is a grain-free pelleted balancer formulated for adult horses with metabolic concerns. It provides 14% protein, 3% fat, and 15% fiber (as fed).
Diamond Perform (Triple Crown)
AntioxidantAntioxidant
FatFat
Gut HealthGut Health
PerformancePerformance
Diamond Perform from Triple Crown is a pelleted feed that is high in fat and fiber. It is intended for performance horses and is meant to assist with gut health and immunity.
Diamond Senior (Triple Crown)
FatFat
FiberFiber
NutrientsNutrients
SeniorSenior
Diamond Senior by Triple Crown is a high-fat, high-fiber feed specifically formulated for senior horses. It includes beet pulp as a fermentable fiber source to support optimal calorie intake.
Diamond Smart Chopped Forage (Triple Crown)
ForageForage
HealthHealth
PerformancePerformance
SeniorSenior
Diamond Smart Chopped Forage by Triple Crown is an orchard and alfalfa hay blend intended to provide a complete diet for performance and mature horses. It's chopped forage format is designed to support easier chewing and swallowing.
Diamond Smart Cube (Triple Crown)
DentalDental
ForageForage
PerformancePerformance
SeniorSenior
Diamond Smart Cubes by Triple Crown is a cube containing beet pulp, timothy hay and orchard hay. It is intended for performance and mature horses.
Diamond Smart Pellet (Triple Crown)
ForageForage
HealthHealth
PerformancePerformance
SeniorSenior
Diamond Smart Pellet by Triple Crown is a Teff hay pellet fortified with vitamins and minerals. It is intended for performance and mature horses.
Distinguished (Hallway)
DigestionDigestion
Gut HealthGut Health
NutritionNutrition
SeniorSenior
Distinguished is a textured feed from Hallway feeds for senior horses fortified with Stamm 30, containing 14% protein and 10% fat. Distinguished uses soluble fibre from beet pulp, soy hulls, and chopped hay. It also contains added oil for energy.
DJ (Platinum Performance)
JointsJoints
Mineral BalanceMineral Balance
ProbioticProbiotic
VitaminsVitamins
Platinum Performance® DJ by Platinum Performance is a powdered vitamin and mineral supplement intended to support joint and digestive health. It contains ingredients such as flaxseed, rice bran, clay, yeast, and a blend of vitamins and minerals.
Double Play (Equi-lete)
Bone HealthBone Health
Gut HealthGut Health
ImmunityImmunity
PerformancePerformance
Double Play by Equi-lete is a vitamin and mineral supplement intended to support gastric health, performance, and the growth of bone and cartilage in performance horses.
Dr. Reeds 3.0 (Purica)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Purica Dr. Reed's 3.0 is a new version of the now-discontinued Dr. Reed's Formula 2 vitamin and mineral supplement. This concentrated supplement provides a mix of organic and inorganic trace minerals, flaxseed and Natural Vitamin E.
Dynamite (Dynamite)
HealthHealth
Hoof HealthHoof Health
NutrientsNutrients
VitaminsVitamins
Dynamite by Dynamite is a supplement containing high amounts of selenium (44.4 ppm), it is intended to support overall health in all performance horses.
Dynasty Pro 14/6 Pellet (Blue Seal)-[Discontinued]
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
GrowthGrowth
NutritionNutrition
Dynasty Pro 14/6 Pellet was a pelleted feed containing 6% fat, 14% protein, fermentable fiber, nutrients, and yeast. This was feed targeted horses of all ages and supported growth, performance, breeding, and lactation.
Dynasty Senior 14/6 Pellet (Kent Equine) – [Discontinued]
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
FiberFiber
SeniorSenior
Dynasty Senior Pellet was high in fiber and provided added fat to maintain body condition in mature and senior horses. This feed contained a blend of vitamins and minerals, yeast cultures, and protein.
Dynasty Show 12/6 Pellet (Kent Equine) – [Discontinued]
Complete FeedComplete Feed
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Dynasty Show 12/6 Pellet was a horse feed designed to meet the energy needs of active adult horses. This feed provided 12% protein, 6% fat, digestible fiber, vitamins, minerals, essential amino acids, antioxidants, and yeast cultures.
Dynasty XT Pro 14/10 Textured Horse Feed (Blue Seal) – [Discontinued]
Complete FeedComplete Feed
FiberFiber
Low NSC FeedsLow NSC Feeds
MuscleMuscle
Blue Seal Dynasty XT Pro 14/10 is a textured horse feed made with shredded beet pulp. It provides 14% protein to support growing, performance and breeding horses.
E & Se (Strictly Equine)
AntioxidantAntioxidant
MetabolismMetabolism
MuscleMuscle
NutrientsNutrients
Strictly Equine E & Se is a vitamin E and selenium yeast supplement for horses. Each 27 g serving provides 1200 IU Vitamin E and 2 mg selenium. This supplement helps support the immune system.
E + Se Pellet (Uckele)
AntioxidantAntioxidant
MetabolismMetabolism
MuscleMuscle
NutrientsNutrients
Uckele E + Se Pellet is an antioxidant supplement for horses containing Vitamin E and the trace mineral selenium. This supplement uses DL-Alpha Tocopherol which is a synthetic form of Vitamin E, and organic selenized yeast.
E + Se Powder (Uckele)
AntioxidantAntioxidant
MetabolismMetabolism
MuscleMuscle
NutrientsNutrients
Uckele E + Se Powder is a granular Vitamin E and selenium supplement for horses. These antioxidants are commonly deficient in the equine diet. This supplement uses dl-alpha tocopherol, which is a synthetic form of Vitamin E.
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-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 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%.
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.
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.
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.
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.

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