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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.
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-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 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)
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.
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.
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.
EquiForce Foot (Havens Horsefeed)
Amino AcidAmino Acid
Hoof HealthHoof Health
NutrientsNutrients
VitaminsVitamins
EquiForce Foot by Havens Horsefeed is an equine hoof health supplement. It contains biotin, B-vitamins, amino acids, and minerals to support hoof growth. One scoop supplies 75mg of biotin.
EquiForce Lyte (Havens Horsefeed)
ElectrolyteElectrolyte
HydrationHydration
Mineral BalanceMineral Balance
StaminaStamina
EquiForce Lyte by Havens Horsefeed is an electrolyte supplement for exercising horses. It contains minerals and antioxidants to support performance. This supplement supports muscle recovery and increased water consumption.
Equilene Complete (Bluebonnet Feeds)
BroodmareBroodmare
Complete FeedComplete Feed
Gut HealthGut Health
PerformancePerformance
Equilene Complete from Bluebonnet is a feed that is meant to be used as a forage replacer, designed for horses at all life stages. This feed provides 10% starch, and 4% sugar.
Equilene Pelleted (Bluebonnet Feeds)
Gut HealthGut Health
Mineral BalanceMineral Balance
ProteinProtein
VitaminsVitamins
Equilene Pelleted from Bluebonnet is a feed intended for horses at all life stages, including breeding, and performance horses. This feed contains 11% starch, 5% sugars, and uses a mix of organic and inorganic trace minerals.
Equilene Pro Care (Bluebonnet Feeds)
FiberFiber
Gut HealthGut Health
Mineral BalanceMineral Balance
VitaminsVitamins
Equilene Pro Care from Bluebonnet Feeds is a beet pulp-based complete feed formulated to support digestive health. It is a low starch formula with 5.5% starch and 8% sugar. It contains added calcium, butyric acid and zinc for digestive support.
Equilene Textured (Bluebonnet Feeds)
Caloric EnergyCaloric Energy
GrainsGrains
Mineral BalanceMineral Balance
VitaminsVitamins
Equilene Textured feed from Bluebonnet Feeds is a complete feed for growth, performance, breeding and horses at maintenance. It contains molasses and vegetable oil as added sources of energy.
Equilene Track Master Ultra Fat (Bluebonnet Feeds)
Caloric EnergyCaloric Energy
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Equilene Track Master Ultra Fat from Bluebonnet Feeds is a high-energy textured feed intended for performance horses. This high-NSC feed contains 30% starch, and 11% sugars,
Equiline Accelerator Plus Ration Balancer (Shur-Gain)
Easy KeeperEasy Keeper
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Aquiline Accelerator Plus Ration Balancer by Shur-Gain is a pelleted mix of vitamins, minerals, and amino acids. It is designed for maintenance and growth of easy keepers.
EquiMin Loose Mineral (Nutrena)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
EquiMin Loose Mineral is a powdered mineral and vitamin supplement intended as a top-dressing for horses on a forage-only feeding program. This powdered mineral is designed to support immune response and health and coat health.
Equine 12-8 Mineral (Tribute)
HealthHealth
Hoof HealthHoof Health
Mineral BalanceMineral Balance
NutrientsNutrients
Tribute Equine 12-8 is a vitamin/mineral supplement intended for all horses. It contains a blend of organic and inorganic mineral sources.
Equine Aged/Adult Diet (Ace Hi Feeds)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
NutritionNutrition
SeniorSenior
Equine Aged/Adult Diet by Ace Hi Feeds is intended for mature or senior horses. It is available with or without molasses and contains added vitamins and minerals. This is a textured feed meant to be fed alongside a forage.
Equine Concentrate (Paddock Tree Nutraceuticals)
Grain FreeGrain Free
HealthHealth
NutrientsNutrients
NutritionNutrition
Equine Concentrate by Paddock Tree Nutraceuticals is a concentrate formulated to be fed along with highly digestible fibre sources, like beet pulp or forage cubes. It is intended for all horse types.
Equine Focus (Bar Ale)
FiberFiber
MuscleMuscle
NutrientsNutrients
YeastYeast
Equine Focus from Bar Ale is intended to be fed to horses and ponies of all ages and work levels. Equine Focus contains beet pulp and soybean meal. Equine Focus total NSC content is 21%.
Equinox (Probiotech)
AntioxidantAntioxidant
HealthHealth
VitaminsVitamins
YeastYeast
Equinox from Probiotech is a supplement that contains antioxidants that can help protect against free radicals. It is also meant to reduce oxidative stress.
EquiSeO (Sollio Agriculture)
AntioxidantAntioxidant
HealthHealth
MuscleMuscle
NutrientsNutrients
EquiSeO by Sollio Agriculture is a pelleted selenium and vitamin E supplement. It is intended for horses with inadequate selenium intake.
Equistages (DuMor)
HealthHealth
NutrientsNutrients
NutritionNutrition
ProbioticProbiotic
Equistages by DuMor is a pelleted feed intended to support overall health in all horse types.
EquiZyme (Bio-Nutrition Laboratories)
HealthHealth
Mineral BalanceMineral Balance
PrebioticPrebiotic
VitaminsVitamins
EquiZyme from Bio-Nutrition Laboratories is a vitamin-mineral supplement. This supplement contains added manno-oligosaccharides, selenium and yeast cultures intended for horses in various performance levels.
Essential (DePaolo Equine Concepts)
Amino AcidAmino Acid
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Essential by DePaolo Equine Concepts is a pelleted supplement that intends to promote healthy coat and hooves, and support a strong immune system. It contains ingredients such as L-Lysine, Biotin, and Vitamins A, B, D, and E.
Essential K (Tribute)
Amino AcidAmino Acid
HealthHealth
Ration BalancerRation Balancer
VitaminsVitamins
Tribute Essential K is a ration balancer with a low 12.5% NSC (sugar plus starch). Essential K provides a mix of organic and inorganic trace minerals, including organic selenium yeast.
Essential K GC Plus (Tribute)
JointsJoints
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Ration BalancerRation Balancer
Tribute Essential K GC Plus is a lower-inclusion ration balancer formulated with glucosamine, chondroitin sulfate, and MSM meant to support joint health.
Essential K Rebuild (Tribute)
Low NSC FeedsLow NSC Feeds
PerformancePerformance
Ration BalancerRation Balancer
RecoveryRecovery
Essential K Rebuild by Tribute is a low-starch, low-sugar pelleted ration balancer formulated for performance horses. Different from Essential K, it has added chromium and turmeric.
Essential K w/ Fly Control (Tribute)
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
Ration BalancerRation Balancer
VitaminsVitamins
Tribute Essential K with Fly Control is a low feeding-rate ration balancer with Diflubenzuron, which can regulate the emergence of common flies.
Esteem Complete Pellet (Bar Ale)
ExerciseExercise
FiberFiber
NutritionNutrition
VitaminsVitamins
Esteem Complete Pellet is a high fiber feed. It is intended for horses and ponies of all ages and work levels. It contains 13% protein, 3.2% fat, and 23% fiber.
Esteem Complete Senior Pellet (Bar Ale)
FiberFiber
NutritionNutrition
SeniorSenior
VitaminsVitamins
Esteem Complete Senior Pellet is a pelleted feed intended for senior horses and ponies. Esteem Complete Senior Pellet is formulated with glucosamine and chondroitin.
Esteem Complete Senior Textured (Bar Ale)
Gut HealthGut Health
NutritionNutrition
SeniorSenior
YeastYeast
Esteem Complete Senior Textured from Bar Ale is intended for senior horses. Esteem Complete Senior Textured is a textured horse feed formulated with beet pulp and alfalfa meal.
EveryDayBalance (Enviro Equine)
PerformancePerformance
Ration BalancerRation Balancer
Skin + HairSkin + Hair
Weight IssuesWeight Issues
EveryDayBalance by Enviro Equine is a flax-based vitamin and mineral supplement intended to support overall health and well-being in all horse types.
Exacta 10 (Seminole)
FiberFiber
FlavorFlavor
Gut HealthGut Health
Organic Trace MineralsOrganic Trace Minerals
Seminole Exacta 10 is a textured feed intended for mature, active horses and ponies, providing 22% NSC. It contains soybeans, wheat middlings, oats, cracked corn, and molasses.
Exacta 12 (Seminole)
FiberFiber
FlavorFlavor
Gut HealthGut Health
Organic Trace MineralsOrganic Trace Minerals
Seminole Exacta 12 is a textured feed intended for active adult horses, providing 12% protein, 7% fat and 22% NSC. It contains soybeans, wheat middlings, oats, cracked corn, and molasses.
Exacta 14 (Seminole)
FiberFiber
FlavorFlavor
Gut HealthGut Health
Organic Trace MineralsOrganic Trace Minerals
Seminole Exacta 14 is a textured feed intended for growing, breeding, and performance horses. It provides 23% NSC and contains soybeans, wheat middlings, oats, cracked corn, and molasses.
Fab Fiber Plus (McCauley’s)
FiberFiber
HealthHealth
NutrientsNutrients
PerformancePerformance
Fab Fiber Plus from McCauley's is a textured feed intended for performance horses. It contains 17% fiber, 12% fat, and 12% protein.
Fat ‘N’ Fibre (pellet) (Masterfeeds)
ExerciseExercise
FatFat
FiberFiber
HealthHealth
Fat 'N' Fibre from Masterfeeds is a pelleted feed that is higher in fat and fibre. It is formulated for idle horses to horses in light work. Fat 'N' Fibre contains 12% protein, 5% fat, and 15% fiber.
Fiber Boost (Ark Nutrition)
FiberFiber
Low NSC FeedsLow NSC Feeds
Mineral BalanceMineral Balance
VitaminsVitamins
Ark Nutrition Fiber Boost is a concentrated fiber source with added vitamins and minerals. It has low sugar and starch content, suitable for metabolic horses.
Fiber First (Excel Equine Feeds)
FatFat
FiberFiber
HealthHealth
NutritionNutrition
Fiber First from Excel Equine Feeds is a textured feed. This feed is intended to be high fat and high fat, with an increased beet pulp content.

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