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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.
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.
MFM Pellet (Kentucky Equine Research)
Amino AcidAmino Acid
HealthHealth
MuscleMuscle
RecoveryRecovery
MFM Pellet is a supplement that is made to assist with muscle recovery and repair and contains amino acids.
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
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.
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.
Nutramino (HorseTech)
Amino AcidAmino Acid
Hoof HealthHoof Health
MuscleMuscle
ProteinProtein
Nutramino by HorseTech is an amino acid supplement that contains lysine, methionine, and threonine. Amino acids are required for protein synthesis in the body.
Nutrequin Elite (Equistro)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Nutrequin Elite is a vitamin, mineral, and amino acid supplement formulated for performance horses as well as lactating and pregnant mares.
OCD Pellets (Doc’s Products)
Bone HealthBone Health
GrowthGrowth
HealthHealth
JointsJoints
OCD Pellets by Doc's Products is a bone and joint supplement intended for horses. It supplies 900 mg of silicon and 50 mg of hyaluronic acid in each 28 g serving.
Omega Advantage (ProElite)
FatFat
GrowthGrowth
Omega 3-6-9Omega 3-6-9
PerformancePerformance
ProElite Omega Advantage is an extruded horse supplement providing 24% fat with added flax. It is intended to provide extra calories and aid in weight gain.
Omega Match Ration Balancing Horse Feed (Purina)
EnergyEnergy
FatFat
FiberFiber
ProteinProtein
Purina Omega Match Ration Balancer is a pelleted feed intended for horses at any activity level and life stage. It is designed to fill nutrient gaps from forage or unfortified grains.
Omolene #300® Growth Concentrate (Purina Mills)
BroodmareBroodmare
Complete FeedComplete Feed
FoalFoal
LactationLactation
Omolene 300 Growth is a textured feed designed for foals, weanlings, yearlings and mares in gestation or lactation. It contains 16% crude protein, 6% crude fat and 7% fibre.
Optimize (Uckele)
FiberFiber
Low NSC FeedsLow NSC Feeds
MetabolismMetabolism
NutrientsNutrients
Optimize is a pelleted ration balancer with a feeding rate of 1-2 lbs per day. It is formulated for horses needing a low starch and sugar diet, such as horses with metabolic disorders. The NSC content in this ration balancer is 7.8%
Original Performance Formula (Wilson Feeds)
HealthHealth
NutritionNutrition
PerformancePerformance
Ration BalancerRation Balancer
Original Performance Formula by Wilson Feeds is a soy-free supplement intended to fill nutritional gaps of horses on a forage-based diet.
Orphan Foal Supplement (Dunstan)
FoalFoal
GrowthGrowth
NutrientsNutrients
ProteinProtein
Orphan Foal by Dunstan is a palatable, digestible feed intended for introducing foals to solid feed. It is a blend of milk powder, vegetable proteins, cereals, vitamins and minerals. It is intended to encourage the transition from milk to solid diet.
Osteo-Max (100x Equine)
Competition HorsesCompetition Horses
HealthHealth
ImmunityImmunity
JointsJoints
Osteo-Max from 100x Equine is a liquid joint supplement for horses. Osteo-Max is intended to support bone remodeling and increase bone density.
Patriot Feed Easy Complete (ADM Animal Nutrition)
Feed EfficiencyFeed Efficiency
FiberFiber
Gut HealthGut Health
PerformancePerformance
Patriot Feed Easy is a pelleted complete forage/feed mix designed to meet the nutritional needs of mature horses when forage supplies are low. It provides less than 20% NSC.
Patriot Mare & Foal Horse Feed (ADM Animal Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Patriot Mare & Foal is a pelleted complete feed designed to meet the needs of gestating and lactating mares as well as foals from 0 to 18 months of age. Patriot Mare & Foal is palatable to encourage consumption.
Patriot Performance Horse Feed (ADM Animal Nutrition)
Complete FeedComplete Feed
EnergyEnergy
ExerciseExercise
PerformancePerformance
Patriot Performance is a pelleted complete feed that is formulated for mature performance horses and broodmares. It provides vegetable fat and digestible fibre sources and contains ~20% NSC.
Patriot Quick Performance (ADM Animal Nutrition)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
ExerciseExercise
PerformancePerformance
Patriot Quick Performance is a pelleted feed formulated for use when forage supply is limited. It contains 20 - 30% NSC and is intended for mature athletic horses that require additional energy.
Patriot Senior Complete Horse Feed (ADM Animal Nutrition)
Complete FeedComplete Feed
FiberFiber
SeniorSenior
ToplineTopline
Patriot Senior is a pelleted complete forage-feed product for senior horses. It is designed to be easy to chew and to meet nutritional needs when forage availability is low.
Pectigus ADVANCED (Hestevard)
Competition HorsesCompetition Horses
DigestionDigestion
Gut HealthGut Health
RecoveryRecovery
Pectigus ADVANCED by Hestevard is a pelleted supplement intended to support gut function and health in horses requiring regular maintenance, and horses during intense training, competition, or recovery.
Performance Advantage (Tribute Equine)
EnergyEnergy
FatFat
FoalFoal
PerformancePerformance
Tribute Performance Advantage® is a grain-based, textured feed formulated to meet the higher energy requirements of performance horses. It provides 8% fat and 31% NSC.
Performance Horse Mineral (Hoffman’s Horse Products)
Mineral BalanceMineral Balance
PerformancePerformance
RecoveryRecovery
VitaminsVitamins
Hoffman's Performance Horse Mineral is a pelleted mineral and vitamin supplement that provides a mix of organic and inorganic trace minerals. This supplement can be provided free-choice or as a top dressing with feed.
Performance Textured (ProElite)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
PerformancePerformance
StaminaStamina
ProElite Performance Horse Feed is a textured feed intended for mature show and performance horses. It provides 12% fat and 18.3% NSC with energy sources including beet pulp, whole oats, wheat middlings, soybean hulls, and cane molasses.
Positude (Equine Elixirs)
HealthHealth
MareMare
NutrientsNutrients
StallionStallion
Positude from Equine Elixirs is a hormone support supplement for horses. It can be given to stallions, geldings, or mares and is made of extracts.
Power Finish (Tribute)
Complete FeedComplete Feed
EnergyEnergy
ExerciseExercise
PerformancePerformance
Tribute Power Finish is a high-fat textured feed intended for adult horses in heavy training. It provides highly digestible energy sources to support the calorie requirements of racehorses. Power Finish contains high levels of protein (13% crude protein), fat (10% crude fat), and NSC (32%).
Pre Buff (DAC)
DigestionDigestion
Gut HealthGut Health
HealthHealth
NutrientsNutrients
Pre Buff by DAC is a liquid gut-health supplement formulated for horses of all working classes. It contains key minerals and amino acids to help maintain a proper gut pH.
Pre-Fuel Liquid (Foran Equine)
Competition HorsesCompetition Horses
EnergyEnergy
ExerciseExercise
NutrientsNutrients
Pre-Fuel Liquid from Foran Equine is intended for horses and ponies in heavy work or competition. This supplement is meant to support nutritional and energy requirements.
Prebiotic + Probiotic Granular (Equine Choice)
DigestionDigestion
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
Equine Choice Prebiotics + Probiotics is a granular (powdered) supplement providing live encapsulated saccharomyces cerevisiae yeast, Bacillus bacteria, digestive enzymes and mannan-oligosaccharide (MOS). Available in a paste or in granular form.
Prebiotic and Probiotic Paste (Equine Choice)
PrebioticPrebiotic
ProbioticProbiotic
StressStress
YeastYeast
Prebiotic and Probiotic Paste from Equine Choice contains live encapsulated saccharomyces cerevisiae yeast. The concentrated paste can assist gut microflora during acute periods of digestive upsets.
Premium Horse Pellet AL (Cargill)
DigestionDigestion
ExerciseExercise
NutrientsNutrients
NutritionNutrition
Premium Horse Pellets (AL) by Cargill are intended as a ration balancer for adult horses.
Prime (Running Horse)
Competition HorsesCompetition Horses
ExerciseExercise
FatFat
PerformancePerformance
Running Horse Prime is a high-energy extruded feed targeted to performance equine athletes. Calorie sources include wheat middlings, pearled barley, soybean hulls, corn DDGS, stabilized rice bran, vegetable oil, flaxseed, and beet pulp.
Pro Star Complete 3/8 (West Feeds)
Caloric EnergyCaloric Energy
FiberFiber
Gut HealthGut Health
NutritionNutrition
Pro Star Complete 3/8 by West Feeds is a high fibre feed with ingredients such as plant protein and processed grains. It contains a minimum of 12% protein and a maximum of 25% fibre.
Pro V.M. (Peak Performance Nutrients)
JointsJoints
MuscleMuscle
PerformancePerformance
StaminaStamina
Pro V.M. by Peak Performance Nutrients is a multi-use vitamin, mineral and amino acid supplement designed with race horses in mind. It intends to support the extreme demands on the horse’s joints, immune system and muscular system.
Pro-Formance 14% (West Feeds)
Complete FeedComplete Feed
ExerciseExercise
FatFat
ProteinProtein
Pro-Formance 14% by West Feeds is a feed for performance horses, with an elevated protein level of 14% and a good level of fat of 6%. This feed is meant for high energy performance and includes ingredients such as inorganic vitamins and minerals and soybean oil to support the activity level.
Pro-Plus (West Feeds)
Caloric EnergyCaloric Energy
ExerciseExercise
GrainsGrains
ProteinProtein
Pro-Plus by West Feeds is a feed meant for active horses, high in energy, with a protein level of 12% and a fat content of 6%. The ingredients in this feed include added soybean oil, inorganic vitamins and minerals, and yeast products to maintain a healthy and active lifestyle.
ProAdvantage – Alfalfa Formula (Progressive Nutrition)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
ProAdvantage® – Alfalfa Formula is a ration balancer concentrate intended for horses consuming alfalfa hay. This feed contains amino acids, vitamins, and minerals in a lower-starch format.
ProAdvantage – Grass Formula (Progressive Nutrition)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
ProAdvantage® – Grass Formula is a concentrated ration balancer intended for horses consuming grass or mixed hay. This feed contains amino acids, vitamins, and minerals in a lower-starch format.
ProAmino (Equine Challenge)
Amino AcidAmino Acid
BroodmareBroodmare
MuscleMuscle
RecoveryRecovery
ProAmino from Equine Challenge is a supplement containing amino acids and omegas 3 and 6. It is intended for growing, pregnant, or lactating horses and can assist with muscle health and recovery.
Professional Farrier’s Choice Hoof Supplement (Vita Stress)
Amino AcidAmino Acid
Hoof HealthHoof Health
ProteinProtein
RecoveryRecovery
Vita Stress Professional Farrier’s Choice Supplement is a hoof supplement containing 14 amino acids. It also supplies biotin and other vitamins important for hoof growth.
ProForce Fuel (Nutrena)
Competition HorsesCompetition Horses
EnergyEnergy
ExerciseExercise
FatFat
Nutrena ProForce Fuel is a 13% fat horse feed intended for performance athletes and hard keepers. It is meant to provide a higher calorie density with a maximum of 20% NSC.
ProForce Fuel XF (Nutrena)
Competition HorsesCompetition Horses
EnergyEnergy
ExerciseExercise
FatFat
Nutrena ProForce® Fuel XF is a 13% fat horse feed formulated for high performance horses that need additional nutritional support to meet the demands of stress and rigorous training.
ProForce Senior (Nutrena)
EnergyEnergy
ExerciseExercise
FiberFiber
SeniorSenior
Nutrena ProForce Senior is an 11% fat horse feed intended for senior equine athletes. It contains energy from digestible fiber sources and extruded fat nuggets with a maximum of 18% NSC.
Pure & Simple Balancer (Hallway)
NutritionNutrition
ProteinProtein
Ration BalancerRation Balancer
ToplineTopline
Pure & Simple Balancer from Hallway is marketed as a non-GMO ration balancer. Pure & Simple contains 14% protein and provides 1048 kcal per lb of digestible energy.
Race Horse Feed (Lifeline)
Competition HorsesCompetition Horses
EnergyEnergy
FiberFiber
NutritionNutrition
Race Horse Feed by Lifeline is a feed formulated for performance horses with high energy demands. This feed contains 14% protein, 7% fat, and 12% fiber.
Rancher’s Sweet – Texture (Trouw)
Gut HealthGut Health
HealthHealth
NutrientsNutrients
NutritionNutrition
Rancher's Sweet Texture by Trouw is a sweet feed intended for horses in light to medium work.
Ration Balancer Original (Lifeline)
DigestionDigestion
Grain FreeGrain Free
HealthHealth
Ration BalancerRation Balancer
Ration Balancer Original by Lifeline is a grain-free pelleted supplement intended for horses who are sensitive to carbohydrates.
Ration Balancer Pellets (Ritchie Smith – Harmony)
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
ProteinProtein
Ration BalancerRation Balancer
Ration Balancer Pellets from Ritchie Smith's Harmony is a low starch, low sugar product that is a source of protein. It can be supplied to any horse and can help meet protein requirements when forage doesn't.
Re-Inforcer EQ (MVP)
AntioxidantAntioxidant
ExerciseExercise
JointsJoints
RecoveryRecovery
Re-Inforcer EQ by MVP is a pelleted supplement that intends to support joints, cartilage and connective tissue. It contains zinc, manganese and copper that intends to provide antioxidant support.

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