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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.
ULZERless Pellets (Formula 707)
DigestionDigestion
Gut HealthGut Health
HealthHealth
UlcersUlcers
ULZERless Pellets from Formula 707 is a pelleted supplement intended to support stomach health and digestion. It is meant for horses prone to ulcers.
Unbeetable Balance (Unbeetable Feeds)
FiberFiber
Grain FreeGrain Free
Mineral BalanceMineral Balance
VitaminsVitamins
Unbeetable Balance is a ration balancer from Unbeetable Feeds. It is a grain-free, pelleted formulation intended for horses that require controlled calorie intake.
Unbeetable Complete (Unbeetable Feeds)
EnergyEnergy
Grain FreeGrain Free
Low NSC FeedsLow NSC Feeds
ProteinProtein
Unbeetable Complete by Unbeetable feeds is a grain free complete feed intended for all horse types. It contains a blend of organic and inorganic trace minerals.
Vermont Blend (Custom Equine Nutrition)
Amino AcidAmino Acid
DigestionDigestion
Mineral BalanceMineral Balance
YeastYeast
Vermont Blend by Custom Equine Nutrition is a supplement intended to balance out the deficiencies when a horse is solely fed grass hay. It contains amino acids, biotin and minerals such as copper and magnesium.
Vermont Blend No Selenium (Custom Equine Nutrition)
Amino AcidAmino Acid
Hoof HealthHoof Health
Mineral BalanceMineral Balance
YeastYeast
Vermont Blend No Selenium is a mineral and vitamin supplement containing no added selenium for horses with diets that already contain adequate amounts of this trace mineral.
Vermont Blend Pellets (Custom Equine Nutrition)
Amino AcidAmino Acid
Mineral BalanceMineral Balance
VitaminsVitamins
YeastYeast
Vermont Blend by Custom Equine Nutrition is a pelleted supplement intended to be fed to horses solely on grass hay. It contains amino acids, biotin and minerals such as copper and magnesium.
Vermont Blend Pro (Custom Equine Nutrition)
Gut HealthGut Health
Hoof HealthHoof Health
Organic Trace MineralsOrganic Trace Minerals
Ration BalancerRation Balancer
Vermont Blend Pro is a forage balancer and hoof supplement with added yeast cultures. It uses organic sources of copper and zinc. It has a lower feeding rate than the original Vermont Blend.
Vermont Blend Pro No Selenium (Custom Equine Nutrition)
Amino AcidAmino Acid
Gut HealthGut Health
Hoof HealthHoof Health
Ration BalancerRation Balancer
Vermont Blend Pro No Selenium by Custom Equine Nutrition is a supplement containing no added selenium intended for horses with diets that already contain adequate amounts of this trace mineral.
VITAboost-Pellet (Herbs for Horses)
Blood CellsBlood Cells
MetabolismMetabolism
Mineral BalanceMineral Balance
VitaminsVitamins
Vitaboost is a multivitamin blend for horses containing 8 water soluble B-vitamins, Vitamin C, natural Vitamin E, microminerals, organic selenium, and amino acids.
VITAboost-Powder (Herbs for Horses)
Blood CellsBlood Cells
MetabolismMetabolism
Mineral BalanceMineral Balance
VitaminsVitamins
Vitaboost is a multivitamin blend for horses containing 8 water soluble B-vitamins, Vitamin C, natural Vitamin E, microminerals, organic selenium, and amino acids.
Weanling (Dunstan)
Complete FeedComplete Feed
GrainsGrains
GrowthGrowth
JointsJoints
Weanling by Dunstan is a cereal grain based complete feed formulated to provide key nutrients for sound growth and development.
Wellness Compete Safe (Seminole) – [Discontinued]
Complete FeedComplete Feed
Competition HorsesCompetition Horses
ExerciseExercise
Low NSC FeedsLow NSC Feeds
Seminole Wellness Compete Safe is a now-discontinued textured horse feed targeted to active horses. It was advertised as a low-starch, high-fat feed with added herbs and stabilized rice bran.
WellSolve W/C Weight Control (Purina)
AntioxidantAntioxidant
Easy KeeperEasy Keeper
NutritionNutrition
Weight IssuesWeight Issues
Purina WellSolve WC® is an extruded concentrate horse feed with a lower calorie density. It is designed to add fibre and nutrients to the diet with low fat content to support weight control.
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.
Wilson’s Cool Formula (Wilson Feeds)
Mineral BalanceMineral Balance
NutrientsNutrients
ProteinProtein
YeastYeast
Wilson's Cool Formula by Wilson Feeds is a granular, textured horse feed formulated to balance forage-based diets. It is soy-free and contains peas and alfalfa as protein sources.
Yearling Mix (Dunstan)
Bone HealthBone Health
Complete FeedComplete Feed
GrowthGrowth
NutrientsNutrients
Yearling Mix by Dunstan is a complete feed intended to meet the nutrient requirements of the growing yearling.

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