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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.
Wellness Equi-Safe (Seminole)
Complete FeedComplete Feed
FiberFiber
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Wellness Equi-Safe® is a low-calorie complete feed for adult horses and ponies with metabolic concerns. This molasses-free feed is composed of long-stemmed fiber from low-starch grasses.
Wellness Grow Right (Seminole)
Complete FeedComplete Feed
FoalFoal
GrowthGrowth
LactationLactation
Wellness Grow Right® is a textured feed targeted to horses of all life stages. It is composed of digestible fiber sources such as soyhulls and beet pulp. It contains added vitamins, organic and inorganic trace minerals, and probiotics.
Wellness Herbal Blend (Seminole)
Complete FeedComplete Feed
HerbHerb
Mineral BalanceMineral Balance
VitaminsVitamins
Wellness Herbal Blend is a textured feed providing 8% fat, 12% protein and 19% NSC. It contains nine added herbs, including garlic, spearmint, parsley, red clover, rosemary, and fenugreek.
Wellness Safe & Lite (Seminole)
Complete FeedComplete Feed
Easy KeeperEasy Keeper
FiberFiber
Low NSC FeedsLow NSC Feeds
Wellness Safe & Lite® is a pelleted feed for adult horses and easy keepers. This low-fat feed contains 15% NSC (12% starch, 3% sugars).
Wellness Senior Mix (Seminole)
Complete FeedComplete Feed
HerbHerb
SeniorSenior
Weight IssuesWeight Issues
Wellness Senior Mix® is a textured, easy-to-chew complete feed. It provides 18% NSC and 10% fat to support body condition maintenance.
Wellness Show & Sport (Seminole)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
PerformancePerformance
StaminaStamina
Wellness Show & Sport® is a high-fat multi-textured feed formulated to meet the higher energy and calorie requirements of performance, endurance, and show horses.
Wellness SportHorse (Seminole)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
FatFat
FiberFiber
Wellness SportHorse is a textured feed intended for performance horses at any life stage. It provides higher calorie density with 10% fat, 14% protein, 16% fiber, and 19% NSC.
Wholesome Blends Balancer (Tribute)
Gut HealthGut Health
HealthHealth
Low NSC FeedsLow NSC Feeds
Ration BalancerRation Balancer
Wholesome Blends Balancer is a soy-free ration balancer with 28% protein, 5% fat and less than 15% NSC. It is formulated with canola, flax, alfalfa, and sunflower meals as well as split peas for protein.
Wholesome Blends Performance (Tribute)
Complete FeedComplete Feed
EnergyEnergy
FatFat
PerformancePerformance
Wholesome Blend Performance is a performance horse feed with higher levels of fat and protein. It is a textured feed using a variety of energy, fat and protein sources, both alternative and conventional.
Wholesome Blends Senior (Tribute)
Complete FeedComplete Feed
DigestionDigestion
FiberFiber
SeniorSenior
Wholesome Blends Senior is a soy-free high-fat and high-fiber textured complete feed for senior horses. It contains beet pulp, alfalfa meal, flaxseed meal, split peas, and canola oil.
Wild Fed Horse Feed (Wild Fed)
FiberFiber
HerbHerb
IngredientIngredient
NutrientsNutrients
Wild Fed Horse Feed is a whole-foods based feed composed of grasses, grains, seeds and herbs. It is made with organic and non-GMO ingredients.
Winning Touch E-Z Hoof (Blue Seal) – [Discontinued]
BroodmareBroodmare
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Winning Touch E-Z Hoof is a pelleted hoof supplement providing 20 mg/LB of biotin as well as Vitamin E, selenium, chelated manganese, zinc, and copper.
Winning Touch Mixed Hay Min-A-Vite (Blue Seal) – [Discontinued]
HealthHealth
MetabolismMetabolism
Ration BalancerRation Balancer
VitaminsVitamins
Winning Touch Mixed Hay Min-A-Vite is a now discontinued concentrated, granular mineral and vitamin supplement intended for horses fed mixed grass/legume hay or pasture. It is meant for horses on a low grain ration.
Woody’s Complete Pellet Feed (Woody’s Horse Nutrition)
Complete FeedComplete Feed
FatFat
FiberFiber
Grain FreeGrain Free
Woody’s Complete is a pelleted feed intended for the majority of adult horses. It is composed of beet pulp, soybeans, alfalfa meal and rice bran and contains added probiotics and chelated trace minerals.
Woody’s Race (Woody’s Horse Nutrition)
Competition HorsesCompetition Horses
EnergyEnergy
PerformancePerformance
RecoveryRecovery
Woody’s Race is a complete feed intended to supply high energy density to horses in moderate to intense work. It is made primarily of oats and corn and contains 11.5% protein and 5% fat.
Wrangler (BUCKEYE Nutrition)-[Discontinued]
DentalDental
Feed EfficiencyFeed Efficiency
Ration BalancerRation Balancer
SeniorSenior
Wrangler is a now-discontinued pelleted horse feed from Buckeye Nutrition. This complete feed was designed for horses with poor teeth or limited access to forage.
Xcelerace (Seminole)
ExerciseExercise
FatFat
FiberFiber
PerformancePerformance
Seminole Xcelerace is a textured feed for performance horses providing 8% fat and 26% NSC. Energy sources include oats, beet pulp, cracked corn, soybeans and cane molasses.
Zero (Hygain)
Complete FeedComplete Feed
FiberFiber
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Zero by Hygain is a low starch and sugar feed designed for horses with metabolic disease or sensitivity to sugars. It is formulated with 15% protein, 4% fat and 35% fibre. It contains both organic and inorganic minerals as well as yeast.
Zone (Banks Mill Feeds)
Mineral BalanceMineral Balance
ProteinProtein
Ration BalancerRation Balancer
VitaminsVitamins
Zone by Banks Mill Feeds is a pelleted ration balancer that is intended to be used to add protein, vitamins, and minerals to the equine diet. It is meant for growing, breeding, and performance horses as well as easy keepers.

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