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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.
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.
Fibre Grow (Dunstan)
BroodmareBroodmare
FiberFiber
FoalFoal
LactationLactation
Fibre Grow by Dunstan is a low-starch, high-fibre pellet intended to meet the requirements of pregnant and lactating mares as well as young growing horses.
Fibre O Plus (Brooks Feeds)
ExerciseExercise
FatFat
FiberFiber
Omega 3-6-9Omega 3-6-9
Fibre O Plus is a textured performance feed for horses with higher energy demands. It provides added calories from beet pulp and fat sources such as flax and rice bran.
Fibrenergy (Hallway Feeds)
Competition HorsesCompetition Horses
FiberFiber
Grain FreeGrain Free
Low NSC FeedsLow NSC Feeds
Hallway Fibrenergy is a high-fat, high-fibre textured feed designed for performance horses. Fibrenergy is grain-free and uses beet pulp, soy hulls and oils for energy.
Finger Lakes 12:7 (Poulin Grain)
Complete FeedComplete Feed
GrainsGrains
PerformancePerformance
ProteinProtein
Finger Lakes 12:7 by Poulin Grain is a textured feed intended for race horses. It contains corn, oats, and vitamin and mineral pellets. It supplies 12% crude protein, 7% fat, and 8% fiber.
Finisher 14 (McCauley’s Equine Formulas)
Coat QualityCoat Quality
FatFat
FoalFoal
Weight IssuesWeight Issues
Finisher 14™ is a textured feed designed for performance horses and preparing sale horses. It provides high levels of vegetable oil and beet pulp to promote a healthy coat appearance.
Finishing Touch (Masterfeeds)
Coat QualityCoat Quality
EnergyEnergy
FatFat
Weight IssuesWeight Issues
Masterfeeds Finishing Touch is a high-fat pelleted horse supplement that is used to promote weight gain or to provide fat as an energy source. It can be top-dressed on feed to increase the calorie density of the diet.
Fit & Fibre – Pelleted (Brooks Feeds)
Complete FeedComplete Feed
FatFat
FiberFiber
NutritionNutrition
Fit and Fibre is a high fat and fibre pelleted feed from Brooks Performance Horse Feeds. It contains a minimum of 6.50% fat and a maximum of 20% fibre with an NSC of 32.4% determined by independent testing. It is listed as a controlled NSC feed.
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 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.
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.

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