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Ingredient

L-Threonine

L-Threonine is an essential amino acid necessary for protein synthesis, muscle maintenance, and immune function in horses. Since it cannot be produced by the horse’s body, it must be obtained through the diet.

In equine nutrition, L-Threonine is one of the first limiting amino acids, meaning its availability directly affects protein utilization and muscle development. It plays a vital role in gut health, supporting mucus production in the digestive tract, which aids nutrient absorption and protects intestinal integrity. L-Threonine supplementation is often used in diets for growing, performance, or recovering horses to optimize protein efficiency and support overall metabolic function.

The following equine feeds, supplements and products contain L-Threonine as an ingredient.

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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.
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.
Three Amigos (Mad Barn)
Amino AcidAmino Acid
MuscleMuscle
ProteinProtein
RecoveryRecovery
Three Amigos is an equine essential amino acid supplement containing lysine, methionine, and threonine in a 5:3:2 ratio. These are the three most common limiting amino acids in the horse's diet.
Threonine (Mad Barn)
Amino AcidAmino Acid
Gut HealthGut Health
MuscleMuscle
ToplineTopline
Threonine is an essential amino acid that is required to be supplied in equine diets as it cannot be synthesized endogenously. Threonine supplementation may improve nutrient absorption.
Visceral+ (Mad Barn)
DigestionDigestion
Gut HealthGut Health
ImmunityImmunity
ProbioticProbiotic
UlcersUlcers
YeastYeast
Visceral+ by Mad Barn is a pelleted gut supplement designed to support stomach and hindgut health in horses. It helps maintain normal digestive function, supports gastric comfort, and helps maintain the immune system.
DailyWerks LD (HorseTech)
HealthHealth
Hoof HealthHoof Health
JointsJoints
Ration BalancerRation Balancer
DailyWerks LD by HorseTech is a daily ration balancer intended to provide hoof and joint support.
Developer Ration (Hoffman’s Horse Products)
BroodmareBroodmare
FoalFoal
Grain FreeGrain Free
GrowthGrowth
Hoffman's Developer Ration is a pelleted feed for weanlings, growing horses up to two years of age, and pregnant broodmares. This feed contains 17% protein, 5.5% fat, 17.5% NSC, and provides a mix of organic and inorganic trace minerals.
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 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.
DigestiveHP (Poseidon Animal Health)
DigestionDigestion
Gut HealthGut Health
HindgutHindgut
ImmunityImmunity
DigestiveHP by Poseidon Animal Health is a gut health supplement intended to support digestion, nutrient absorption and overall immune health in horses requiring additional gut support.
Dragon Paste (Equine Choice)
CalmingCalming
HealthHealth
PerformancePerformance
StressStress
Dragon Paste by Equine Choice is a calming supplement designed for performance horses. It is formulated with amino acids, magnesium citrate, casein and probiotics.
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.
Elements (ProElite)
Amino AcidAmino Acid
HealthHealth
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Elements by Pro Elite is a powdered supplement that provides essential vitamins, minerals, and amino acids for horses on a forage-only diet.
Elite Ration (Hoffman’s Horse Products)
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Weight IssuesWeight Issues
Hoffman's Elite Horse Ration is a feed intended for horses in moderate to heavy work, or hard keepers. This feed contains flax, rice bran, and vegetable oils for energy, providing 15.5% NSC and 8% fat.
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.
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.
Eqceed Senior (Tucker Milling)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
SeniorSenior
Eqceed Senior by Tucker Milling is a complete feed intended for mature horses. It can be fed at high levels for horses with poor dental condition.
Eqceed Ultra Balancer (Tucker Milling)
BroodmareBroodmare
GrowthGrowth
NutritionNutrition
Ration BalancerRation Balancer
Eqceed Ultra Balancer by Tucker Milling is a ration balancer intended for growing horses, broodmares, and mature horses. It provides 30% crude protein, 6% fat, and 6% crude fiber.
Eqceed Ultra Complete (Tucker Milling)
Complete FeedComplete Feed
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
Eqceed Ultra Complete by Tucker Milling is a textured feed intended for mature horses. It provides 12% crude protein, 12% fat, and 12% crude fiber.
Eqceed Ultra Growth (Tucker Milling)
BroodmareBroodmare
Complete FeedComplete Feed
GrowthGrowth
StallionStallion
Eqceed Ultra Growth by Tucker Milling is a textured feed intended for growing horses, broodmares, and stallions. It provides 14% crude protein, 10% fat, and 15% crude fiber.
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.
Equi-Librium Balancer (Tribute)
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
Equi-Librium Balancer by Tribute is a pelleted ration balancer that contains 9.5% NSC. It is intended for horses that need low intake of starch and sugar.
Equi-Librium Senior (Tribute)
Complete FeedComplete Feed
FlavorFlavor
Hay StretcherHay Stretcher
SeniorSenior
Equi-Librium Senior by Tribute is a high fiber feed intended for senior horses. It can serve as a partial or complete hay replacement.
Equilibrium Trimax (Purina)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
PerformancePerformance
Weight IssuesWeight Issues
Purina Equilibrium Trimax is an energy-dense multi-particle feed intended for hard-keepers and performance horses. It provides 12% fat from vegetable oils and fermentable fibre from beet pulp to meet higher calorie requirements.
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 Junior® Complete Horse Supplement (Purina Mills)
Complete FeedComplete Feed
FatFat
FoalFoal
GrowthGrowth
Purina Equine Junior Horse Feed is a pelleted feed for growing horses that have been weaned. It provides protein, calories, vitamins and minerals to support development.
Essential K (Tribute)
Amino AcidAmino Acid
ProbioticProbiotic
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.
Evolution Juvenile (Purina)
Caloric EnergyCaloric Energy
FoalFoal
GrowthGrowth
Ration BalancerRation Balancer
Evolution Juvenile by Purina is a multiparticle feed for growing horses made with pelleted and extruded components. It is designed to meet the nutritional needs of weanlings, yearlings and two-year olds.
Excel (DePaolo Equine Concepts)
Gut HealthGut Health
HealthHealth
PrebioticPrebiotic
UlcersUlcers
Excel from DePaolo Equine Concepts is a supplement that aims to support and soothe the digestive tract in horses. It also can help with ulcers and the bacterial balance in the gut.
Farrier’s Best Friend (Pegasus)
Bone HealthBone Health
HealthHealth
Hoof HealthHoof Health
Skin + HairSkin + Hair
Farrier's Best Friend from Pegasus is meant to support hoof, skin, and hair health. This supplement contains biotin, zinc, methionine, and calcium.
Fat and Fiber (Right Choice)
Amino AcidAmino Acid
Omega 3-6-9Omega 3-6-9
PerformancePerformance
VitaminsVitamins
Fat and Fiber by Right Choice is a pelleted feed intended for mature horses at work or maintenance. It provides 12% protein, 10% fat, and 15% crude fiber.
Feed Up (Dunstan)
EnergyEnergy
FoalFoal
GrainsGrains
GrowthGrowth
Feed Up by Dunstan is a complete feed comprised of mixed cereals lightly covered in molasses. It is intended to be a highly palatable feed that provides energy in a usable form to growing horses.
Fibre Smart (Matrix)
Caloric EnergyCaloric Energy
FiberFiber
Gut HealthGut Health
HindgutHindgut
Fibre Smart by Matrix is a pelleted, complete feed with a higher fiber content of 22%. It provides 14% protein and 6% fat, and is designed to feed to horses in light - moderate work that require additional calories beyond forage.
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.
Futurity Blend 14 (Woody’s Feed)
BroodmareBroodmare
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
LactationLactation
Woody's Futurity Blend 14 is a high starch feed with 14% protein and 4.5% fat, targeted to broodmares and foals. It is formulated to support gestation, lactation and growth.
Gastri-Kalm (Equestrizone)
DigestionDigestion
Gut HealthGut Health
HindgutHindgut
IngredientIngredient
Gastri - Kalm from Equestrizone helps to maintain healthy gastrointestinal function and aids natural healing after ulcers have been treated. It contains antacids to help soothe horses' stomachs.
GastroPRO Pellets (Horse Logic Pro) – [Discontinued]
DigestionDigestion
Gut HealthGut Health
HealthHealth
HerbHerb
GastroPRO Pellets from Horse Logic Pro is a pelleted gut supplement. GastroPRO Pellets are intended to aid in digestion. This supplement is formulated with a herb blend containing licorice root, grape seed extract, and marshmallow root.
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.
Good n Sound (West Feeds, Inc)
Complete FeedComplete Feed
DigestionDigestion
Grain FreeGrain Free
NutritionNutrition
Good n Sound is a pelleted equine feed that contains 14% protein and 7% fat. It is intended for senior horses, hard keepers, and horses with sensitive stomachs.
Grand Premium Plus (Grand Meadows)
Complete FeedComplete Feed
Hoof HealthHoof Health
JointsJoints
NutritionNutrition
Grand Premium Plus is a complete feed for horses that provides vitamins, minerals, and amino acids, as well as ingredients for joint support and digestion. Ideal for horses and ponies of all ages and work levels.
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.
GROSTRONG Metabolic Mineral Pellet (ADM Animal Nutrition)
ElectrolyteElectrolyte
Gut HealthGut Health
MetabolismMetabolism
Ration BalancerRation Balancer
GroStrong Metabolic Mineral Pellet by ADM is a pelleted supplement intended for overweight, starch-sensitive and easy keeper horses. It contains a blend of organic and inorganic minerals in a corn-, alfalfa- and molasses- free formulation.
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 Pellets (Tribute)
FatFat
FiberFiber
GrowthGrowth
LactationLactation
Tribute Growth Pellet is a 15% NSC pelleted feed intended for broodmares during pregnancy and lactation and growing foals from 3 months to 2 years. It provides higher protein to support development.

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