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Selenium - Feed Ingredient

Selenium is an essential trace mineral required in equine nutrition for its role in antioxidant defense, immune function, and thyroid hormone metabolism. It is a key component of glutathione peroxidase, an enzyme that helps protect cells from oxidative damage by neutralizing free radicals. Selenium also plays a role in muscle function and overall metabolic health.

Horses can obtain selenium from forages, but its content varies depending on soil selenium levels in different regions. In areas with selenium-deficient soils, supplementation is necessary to prevent deficiencies, which can lead to conditions such as white muscle disease, impaired immune function, and poor reproductive health. Selenium is commonly supplemented in the form of sodium selenite, sodium selenate, or organic selenium sources such as selenium yeast, which is considered more bioavailable.

Because selenium has a narrow margin of safety, excessive intake can lead to toxicity, characterized by symptoms such as hair loss, hoof abnormalities, and neurological issues. Proper formulation and monitoring of selenium intake are essential to ensure optimal health in horses.

The following equine feeds, supplements and products contain 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.
Maxim Low-GI (Dunstan)
FiberFiber
HealthHealth
Low NSC FeedsLow NSC Feeds
NutritionNutrition
Maxim Low-GI by Dunstan is a high fibre feed formulated to be low in starch and sugar. It is intended for horses that do not do well on grain-based feeds.
Meadow Lite (Lakin Milling Company)
FiberFiber
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
PerformancePerformance
Meadow Lite from Lakin Milling Company is a low NSC pelleted feed (9.3%). Meadow Lite Horse Pellets is intended for horses in all levels of work and is formulated with a blend of alfalfa and timothy hay.
Medicine Bag Complete (Stance Equine USA)
GrowthGrowth
HealthHealth
Mineral BalanceMineral Balance
MuscleMuscle
Medicine Bag Complete by Stance Equine is a powdered mineral supplement intended for all types of horses.
Mega Dose (Horse Guard)
DigestionDigestion
Gut HealthGut Health
Mineral BalanceMineral Balance
VitaminsVitamins
Mega Dose by Horse Guard is a supplement that contains vitamins, minerals, and probiotics. It is intended to assist with digestion, gut health and hoof health.
Mega-Cell MVP – Pelleted Multi Vitamin and Mineral (Med-Vet)
HealthHealth
ProbioticProbiotic
Ration BalancerRation Balancer
VitaminsVitamins
MVP Mega-Cell is a pelleted vitamin and mineral supplement for horses formulated to balance grass hays and grain-based diets. It is also a source of amino acids and microbials.
Mega-FLX + HA (Spectra)
ExerciseExercise
JointsJoints
MuscleMuscle
RecoveryRecovery
Mega-FLX + HA is an equine supplement intended for targeting joint and muscle health. This liquid formulation contains vitamins, and minerals as well as MSM and hyaluronic acid.
Mega-Mag (Pellets) (MVP)
Amino AcidAmino Acid
Mineral BalanceMineral Balance
ProbioticProbiotic
VitaminsVitamins
Mega-Mag by MVP is a pelleted supplement designed for alfalfa hay/grain diets that provide vitamins, minerals, amino acids, and probiotics intended horses of all life stages.
Meganutril Ultra (Equina USA)
AntioxidantAntioxidant
HealthHealth
ImmunityImmunity
VitaminsVitamins
Meganutril Ultra from Equina USA is a mineral supplement for horses. Meganutril Ultra contains vitamins, amino acids, and yeast. This supplement is intended to balance nutritional deficiencies in horses.
Mellow Muscle (Sierra Gold)
CalmingCalming
Mineral BalanceMineral Balance
MuscleMuscle
VitaminsVitamins
Mellow Muscle by Sierra Gold is a powdered supplement for horses intended to aid horses suffering from PSSM. It contains vitamins, minerals, and amino acids which intend to support muscle growth.
Meta Safe (Hygain)
ImmunityImmunity
MetabolismMetabolism
Ration BalancerRation Balancer
Weight IssuesWeight Issues
Meta Safe from Hygain is a ration balancer pellet for horses. Meta Safe is intended for horses on a restricted diet or suffering from metabolic issues. This feed contains 6.5% NSC.
Meta-Librium (Equi-Force)
CalmingCalming
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
VitaminsVitamins
Meta-Librium is a supplement intended to help manage metabolic syndrome and insulin resistance in horses and ponies. It contains magnesium, lipoic acid, vitamin E and C, and L-Carnitine, enhancing insulin action.
Metabolic Miracle (Aterak Nutrition)
Grain FreeGrain Free
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
VitaminsVitamins
Metabolic Miracle by Aterak Nutrition is a feed targeted toward horses or ponies with metabolic disorders (Cushing's, Founder, Laminitis). This feed contains the vitamins and minerals necessary to support a well-balanced diet and is high in fibre.
MetaBoost (Pureform)
Amino AcidAmino Acid
AntioxidantAntioxidant
ToplineTopline
VitaminsVitamins
MetaBoost from Pureform is a supplement for horses that contains antioxidants, vitamins, amino acids and minerals. It is meant to support digestion, muscles, and topline.
Micro-Max (Kentucky Equine Research)
Gut HealthGut Health
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
KER Micro-Max is a vitamin/mineral supplement intended for horses on high-forage diets. It contains macro- and micro-minerals, and vitamins A, D and E.
Midwestern Sweet Mix (Country Road)
Easy KeeperEasy Keeper
IngredientIngredient
NutrientsNutrients
NutritionNutrition
Midwestern Sweet Mix from Country Road is a multi-purpose livestock feed. Midwestern Sweet Mix is a textured feed with added molasses.
Milestone Compete Horse Food (Muenster)
Coat QualityCoat Quality
Competition HorsesCompetition Horses
FatFat
MuscleMuscle
Complete Horse Food is intended to promote muscle growth and function. It is ideal for performance horses and breeding stock as extra calories and energy are needed.
Milestone Foal Horse Food (Muenster)
FiberFiber
FoalFoal
GrowthGrowth
ProteinProtein
Foal Horse Food is intended for horses and ponies under the age of 1. The diet includes nutrients needed for normal growth and development.
Milestone Life Horse Food (Muenster)
Caloric EnergyCaloric Energy
FiberFiber
GrainsGrains
Hay StretcherHay Stretcher
Life Horse Food is designed to be a hay replacer and provide nutrients to horses and ponies of all ages. It is ideal for horses that are in moderate work.
Milestone Life Plus Horse Food (Muenster)
FatFat
FiberFiber
GrainsGrains
Omega 3-6-9Omega 3-6-9
Life Plus is a pelleted feed intended to provide additional energy and nutrients to all horses and ponies. It is also suitable for performance horse and breeding horses as they need extra essential nutrients.
Milestone Optimize Horse Supplement (Muenster)
FatFat
NutritionNutrition
Omega 3-6-9Omega 3-6-9
Weight IssuesWeight Issues
Optimize Horse Supplement is a high-fat feed intended to provide more energy to breeding horses and performance horses. It contains nutrient dense ingredients such as coconut meal and flaxseed.
Milestone Senior Horse Food (Muenster)
FatFat
FiberFiber
MareMare
SeniorSenior
Milestone Senior Horse Food is a pelleted feed intended for older horses in light to moderate work. It is suitable as a supplemental feed when forage availability is limited. It contains high fiber, low starch, alfalfa, coconut, flax, and algae meal.
Milk & Grow Pellets (Uckele)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Milk & Grow Pellets is a vitamin, mineral, probiotic, and amino acid pelleted supplement formulated for lactating and gestating mares as well as growing foals that have increased nutrient demands.
Min-A-Vite (Blue Seal) [DISCONTINUED]
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Min-A-Vite from Blue Seal is a vitamin and mineral supplement intended for horses and ponies of all ages and work levels. Min-A-Vite uses a mix of inorganic and organic trace minerals.
MinerEQ (Omega Alpha)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
MuscleMuscle
VitaminsVitamins
MinerEQ by Omega Alpha is a powdered vitamin and mineral supplement for horses that provides essential minerals, trace elements, vitamins, and antioxidants to maintain good health.
Miniature Horse and Pony (Purina)
EnergyEnergy
Gut HealthGut Health
NutritionNutrition
ProteinProtein
Purina® Miniature Horse and Pony is a pelleted concentrate feed intended for all classes of miniature horses and ponies. These animals have different metabolic needs compared to other horses.
Moore Horse Super Dry (Thomas Moore Feed)
FiberFiber
Mineral BalanceMineral Balance
NutrientsNutrients
NutritionNutrition
Moore Horse Super Dry by Thomas Moore Feed is a feed intended for maintenance horses. It has 12% protein, 2% fat, and 17% fiber. It also contains vitamins and minerals.
Moore Power 12-8 (Thomas Moore Feed)
FatFat
Mineral BalanceMineral Balance
NutritionNutrition
ProteinProtein
Moore Power 12-8 by Thomas Moore Feed is a pelleted feed that contains 12% protein and 8% fat. It is intended to balance the diet, assist with body conditioning, and contains vitamins and minerals.
Moore Power 14-10 (Thomas Moore Feed)
EnergyEnergy
GrowthGrowth
NutrientsNutrients
PerformancePerformance
Moore Power 14-10 from Thomas Moore Feed is a high energy feed that is intended for breeding, growing, or performance horses. It contains protein, fat, fiber, vitamins and minerals.
Moore Power Senior (Thomas Moore Feed)
Mineral BalanceMineral Balance
NutrientsNutrients
SeniorSenior
VitaminsVitamins
Moore Power Senior from Thomas Moore Feed is a feed meant for senior horses. It contains minerals, vitamins, fiber and protein. It is intended to assist with maintenance of senior horses.
Moulee HM 13% Liberte (Nature Belisle)
Complete FeedComplete Feed
GrainsGrains
NutritionNutrition
PerformancePerformance
Moulee HM 13% Liberte is a textured feed intended for performance horses and those in heavy work. It contains 13% protein, 6.09% fat, and 7.86% fibre.
Moulee Jument 16% Liberte (Nature Belisle)
BroodmareBroodmare
Complete FeedComplete Feed
NutritionNutrition
ProteinProtein
Moulee Jument 16% Liberte is a cubed feed intended for broodmares. It contains 16% protein, 4.85% fat, and 8.35% fibre.
Moulee Poulain Liberte 17% (Nature Belisle)
Complete FeedComplete Feed
FoalFoal
GrowthGrowth
NutritionNutrition
Moulee Poulain Liberte 17% by Nature Belisle is intended for horses and ponies aged 0-2 years of age. This cubed feed contains 17% protein as its primary energy source.
Moulee Q-F 15% Liberte (Belisle)
EnergyEnergy
FatFat
FiberFiber
NutritionNutrition
Moulee Q-F 15% is a complete feed with 15% crude protein and 7% crude fat. It also contains vitamin E and selenium. This feed is intended for all horses and ponies.
Moulée Quali-Fibre (Nature Belisle)
FiberFiber
Omega 3-6-9Omega 3-6-9
ProbioticProbiotic
VitaminsVitamins
Moulee Quali-fibre is a feed intended for horses with higher energy demands, such as performance horses. It contains 15% protein, 7% fat and 23% fibre with added vitamin E and selenium.
Move Free (Dunstan)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
Competition HorsesCompetition Horses
ExerciseExercise
Move Free by Dunstan is a textured feed formulated to support horses who are prone to "Tying-Up". It is intended for horses with high energy demands but are unable to tolerate high grain diets. It contains sugarbeet and soybean hulls to provide calories from low starch, high fibre sources.
MuesliMax (Hallway)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
EnergyEnergy
FatFat
MuesliMax from Hallway is a sweet feed fortified with Stamm 30 formulated for high-performance horses with high energy needs. This feed provides energy from oats, barley, vegetable oil, and black sunflower seeds. MuesliMax contains 11% protein, 8% fat, and 10% fibre.
Multi-Max (West Feeds)
GrainsGrains
Mineral BalanceMineral Balance
NutritionNutrition
ProteinProtein
VitaminsVitamins
Multi-Max by West Feeds is a top-dressed supplement meant to support most livestock production animals, with a high level of protein of 28%. The ingredients in this feed include inorganic vitamins and minerals and yeast strains to increase digestibility.
Multi-Species Milk Replacer (Hubbard Feeds)
Bone HealthBone Health
FoalFoal
GrowthGrowth
NutritionNutrition
Hubbard® Life Multi-Species Milk Replacer supplies complete nutrition for foals, goat kids, lambs, calves and piglets. It is used to replace or supplement mother's milk with all-milk protein sources and high fat.
MultiSentials 1:1 (Sentinel Care)
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
PerformancePerformance
VitaminsVitamins
MultiSentials 1:1 by Sentinel Care is a complete granular supplement formulated to correct nutritional deficiencies caused by hay and pasture-based diets. It is suitable for all classes of working horses
Munga (Hygain)
Easy KeeperEasy Keeper
HealthHealth
Low NSC FeedsLow NSC Feeds
NutritionNutrition
Munga from Hygain is a textured feed intended for horses in light to medium work levels. Munga contains 13% NSC, 25% crude protein and 11% crude fat.
Muscle-UP Max Performance (AniMed)
Amino AcidAmino Acid
HealthHealth
MuscleMuscle
PerformancePerformance
Muscle-UP Max Performance from AniMed is a supplement meant to help with proper muscle function and health. It can also help with a horse's overall health and physical condition.
Myo-Guard (Kentucky Performance Products)
AntioxidantAntioxidant
MuscleMuscle
PerformancePerformance
VitaminsVitamins
Myo-Guard from Kentucky Performance Products aims to provide muscle support and strength by providing antioxidants.
Natur-Alfa Oat (Excel Equine Feeds)
EnergyEnergy
HealthHealth
NutrientsNutrients
NutritionNutrition
Natur-Alfa Oat from Excel Equine feeds is a cubed feed. Natur-Alfa Oat is an oat-alfalfa feed intended for a wide range of horse lifestyles.
Natur-Oat (Excel Equine Feeds)
Easy KeeperEasy Keeper
HealthHealth
NutrientsNutrients
NutritionNutrition
Natur-Oat from Excel Equine Feeds is a cubed feed. Natur-Oat is intended for horses in various life stages and is composed of ground oats.
Natural Balance (Havens Horsefeed)
Caloric EnergyCaloric Energy
FiberFiber
NutritionNutrition
Omega 3-6-9Omega 3-6-9
Natural Balance by Havens Horsefeed is an oat- and molasses-free textured feed. It contains wheat, puffed corn, alfalfa meal, and added vitamins and minerals. This feed is intended for nervous horses and those prone to laminitis, summer itch, and insulin resistance.
Natural Blend Performance (Bluebonnet Feeds)
GrainsGrains
NutrientsNutrients
PerformancePerformance
ProbioticProbiotic
Natural Blend Performance from Bluebonnet Feeds is intended for horses at all life stages with added soybean as a source of fat. It contains 12% protein, 10% fat, and 15% fibre, with added probiotics and organic trace minerals.
Natural Digestive Support – BioEquine Supplement
DigestionDigestion
Mineral BalanceMineral Balance
ProbioticProbiotic
Toxin BinderToxin Binder
BioEquine Natural Digestive Support is an equine gut health supplement containing probiotics, toxin binders, Diatomaceous Earth, minerals, vitamins and amino acids.
Natural Senior (Thomas Moore Feed)
Complete FeedComplete Feed
NutrientsNutrients
SeniorSenior
YeastYeast
Natural Senior from Thomas Moore Feed is a complete feed for senior horses. It is intended to be highly soluble to assist senior horses and contains yeast and micronutrients.
Naturals Pelleted Horse Feed (Triple Crown)
Complete FeedComplete Feed
EnergyEnergy
HealthHealth
ProteinProtein
Triple Crown Naturals is a pelleted horse feed made with GMO-free ingredients and without corn, soybean, or molasses. Energy sources include alfalfa meal, ground oats, wheat middlings, and flaxseed.
Naturals Timothy Balance Cubes (Triple Crown)
FiberFiber
ForageForage
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Triple Crown Naturals Timothy Balance® Cubes are a forage replacement composed of timothy hay, beet pulp, and added minerals. Forage cubes are a high-fibre, low-protein, and low-NSC feed option for horses with metabolic concerns.

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