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L-Threonine - Feed Ingredient

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.

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.
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.
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 supplement to be used for horses with gastric health concerns. It is designed to maintain stomach and hindgut health and to support the immune system.
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 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.
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
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.
Evolution Juvenile (Purina)
Caloric EnergyCaloric Energy
FoalFoal
GrowthGrowth
Ration BalancerRation Balancer
Evolution Juvenille 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.
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.
Growth Textured (ProElite)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
ProElite Growth Horse Feed is a textured feed intended for foals, growing horses, and broodmares. It provides 16% protein to support development with a maximum NSC of 19.8%.
Growth Textured (Tribute)
Bone HealthBone Health
GrowthGrowth
LactationLactation
ProteinProtein
Tribute Growth Textured is a complete textured feed intended for broodmares during pregnancy and lactation as well as growing horses from 3 months to 2 years. It provides high protein levels which can support growth and is formulated for diets containing less than 50% legume forage.
GutBiome (ProElite)
DigestionDigestion
PrebioticPrebiotic
ProbioticProbiotic
YeastYeast
GutBiome by ProElite is a microbiome supporting supplement containing both probiotics and postbiotics. It is intended to support a healthy gut.
Healthy Balance Farmland Recipe Horse Feed (Dr. Pol)
Caloric EnergyCaloric Energy
HealthHealth
NutritionNutrition
SeniorSenior
Healthy Balance Farmland Recipe Horse Feed is an extruded feed that intends to enhance coat health and promotes lean muscle growth while supporting senior horses with bad or missing teeth.
Healthy Evolution Farmland Recipe Horse Feed (Dr. Pol)
DentalDental
GrainsGrains
Mineral BalanceMineral Balance
VitaminsVitamins
Healthy Evolution Farmland Recipe Horse Feed is an extruded feed intended to enhance coat health and promote lean muscle growth for pregnant/lactating mares and growing foals.
Healthy Gut Remedy (Horse Logic Pro)
Gut HealthGut Health
HealthHealth
ImmunityImmunity
YeastYeast
Healthy Gut Remedy from Horse Logic Pro is a pelleted gut supplement for horses. Healthy Gut Remedy is intended to provide hind gut support.
High Fat Pellets (Ritchie Smith – Harmony)
Complete FeedComplete Feed
EnergyEnergy
Low NSC FeedsLow NSC Feeds
MetabolismMetabolism
High Fat Pellets from Ritchie Smith's Harmony is a complete feed that has a low NSC value and is ideal for hard keepers, performance horses, stallions, horses who need slow release energy or horses with metabolic issues. It can help with immunity, hooves and skin, and gut health.
High Fibre Pellets (Ritchie Smith – Harmony)
FiberFiber
HealthHealth
Low NSC FeedsLow NSC Feeds
NutritionNutrition
High Fibre Pellets from Ritchie Smith's Harmony is a low NSC feed intended for easy keepers or horses who have metabolic issues. This feed is 13% crude protein and 5% fat.
High Point Pellets (HorseTech)
Gut HealthGut Health
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
High Point Pellets by HorseTech is a pelleted vitamin and mineral supplement formulated to balance forage-based diets and support overall health. It also contains added prebiotics to promote optimal digestive function.
High Point-Alfalfa Hay (HorseTech)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
High Point- Alfalfa from HorseTech is a vitamin and mineral supplement which is designed to be fed in alfalfa-based diets. The 3-ounce feeding rate provides phosphorus and essential vitamins as well as trace minerals.
High Point-Grass/Mixed Hay (HorseTech)
HealthHealth
ProbioticProbiotic
Ration BalancerRation Balancer
VitaminsVitamins
High Point-Grass/Mixed Hay is a vitamin-mineral supplement formulated for horses consuming grass or mixed hay diets. This supplement provides a higher calcium-phosphorous ratio.
Hoof Formula (Kevin Bacon’s Horse Care) – [Discontinued]
Amino AcidAmino Acid
Competition HorsesCompetition Horses
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Hoof Formula from Kevin Bacon's Horse Care is a now discontinued hoof supplement that supports hoof growth and quality. It contains added protein, calcium, vitamin A, biotin and other minerals.
Horse Crunchies (Hoffman’s Horse Products)
Easy KeeperEasy Keeper
FlavorFlavor
HealthHealth
NutritionNutrition
Horse Crunchies from Hoffman's is a cubed treat for horses. Horse Crunchies are 22% NSC and are intended to be a healthy treat option for horses.
Ignite – 30% High Fat Supplement (Running Horse)
Coat QualityCoat Quality
EnergyEnergy
FatFat
Weight IssuesWeight Issues
Running Horse Ignite is a 30% fat supplement formulated with rice bran, vegetable oil and flaxseed. It can be used for weight gain and improving coat condition or as a top dressing to increase energy content in the diet.

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