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Amino Acids - Feed Ingredient

Amino acids are the fundamental components of proteins and play essential roles in muscle development, enzyme activity, immune function, and overall metabolism in horses. They are classified as essential or non-essential based on whether they must be obtained from the diet or can be synthesized by the horse’s body. Essential amino acids, such as lysine, methionine, and threonine, must be provided in sufficient amounts to support protein synthesis and physiological functions.

In equine nutrition, amino acids are included in feeds and supplements to improve protein quality and ensure balanced nutrient intake. Lysine is considered the first limiting amino acid in horse diets, meaning its deficiency can restrict protein utilization even if total protein intake appears adequate. Methionine, another essential amino acid, is critical for hoof integrity, muscle maintenance, and metabolic processes but is often limited in plant-based protein sources. Proper amino acid balance is particularly important for young, growing horses, performance horses, and those on forage-based diets with lower-quality protein sources.

The following equine feeds, supplements and products contain Amino Acids 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.
DL-Methionine (Mad Barn)
Amino AcidAmino Acid
Coat QualityCoat Quality
Competition HorsesCompetition Horses
IngredientIngredient
Methionine is an essential amino acid that is important for maintaining healthy tendons, ligaments, and hooves. Growing horses and horses who are in heavy exercise have a higher demand for methionine and would benefit from supplementation.
L-Lysine (Mad Barn)
Amino AcidAmino Acid
ImmunityImmunity
IngredientIngredient
JointsJoints
Lysine is an essential amino acid that is important for forming strong collagen bonds. Lysine is the most commonly deficient amino acid in equine diets.
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.
Tie Free TMC Paste (Peak Performance Nutrients)
ExerciseExercise
MuscleMuscle
RecoveryRecovery
StressStress
Tie Free TMC Paste is a sodium bicarbonate free electrolyte supplement that supports replenishment of glycogen stores, muscle recovery, and muscles prone to tying up. It contains potassium chloride, potassium carbonate, and magnesium sulphate.
Tie Up Event Pak (Peak Performance Nutrients)
ElectrolyteElectrolyte
MuscleMuscle
PerformancePerformance
RecoveryRecovery
Tie Up Event Pak by Peak Performance Nutrients is a sodium-bicarbonate-free powdered supplement that supports proper electrolyte balance and excess lactic acid buildup. It contains nutrients such as potassium, magnesium, and thiamine.
Tie-By (AniMed)
AntioxidantAntioxidant
ExerciseExercise
MuscleMuscle
RecoveryRecovery
AniMed TIE-BY is an antioxidant supplement for horses that routinely "tie-up." Ingredients include L-carnitine, magnesium, selenium, chromium and Vitamin E. This supplements supports the function of skeletal muscles and muscle enzyme activity.
TNT For Horses (Dynamite Equine)
HealthHealth
ImmunityImmunity
NutritionNutrition
VitaminsVitamins
TNT For Horses from Dynamite Equine is a pelleted equine supplement. TNT For Horses is intended to support overall equine health. This supplement contains 18% protein and 8% fat.
Tonix (Sollio Agriculture)
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
Tonix is a complete pelleted vitamin, mineral, and protein supplement for horses receiving little or no feed. It is intended for maintenance and exercising horses.
Top-Line Advanced Support (Progressive Nutrition)
Amino AcidAmino Acid
HealthHealth
MuscleMuscle
ToplineTopline
Top-Line Advanced Support is an amino acid supplement from Progressive Nutrition intended to support muscle and topline development in horses. It contains L-lysine, L-threonine, L-methionine, L-leucine, L-valine, L-isoleucine, and L-tryptophan.
Top-Line Xtreme (ProElite)
Amino AcidAmino Acid
MuscleMuscle
ProteinProtein
ToplineTopline
Top-Line Xtreme is a topline supplement that includes high levels of protein and amino acids. It is meant to support the health of horses' topline, muscles, and recovery processes. It is flavored and in micro-pellet form.
Topline Advantage (ProElite)
DigestionDigestion
NutritionNutrition
ProteinProtein
ToplineTopline
ProElite Topline Advantage is a pelleted horse supplement that provides essential nutrients and amino acids for muscle development. It contains 50% crude protein.
Topp40 (Sollio Agriculture)
Amino AcidAmino Acid
HealthHealth
PerformancePerformance
ProteinProtein
Topp40 is a pelleted protein and amino acid supplement. This supplement is intended for horses who require additional protein in their diets.
Total Blood Fluids Muscle (Ramard)
Blood CellsBlood Cells
ElectrolyteElectrolyte
MuscleMuscle
PerformancePerformance
This supplement from Ramard is meant to assist in muscle recovery, health, and strength. It also provides energy and increases the amount of red blood cells in horses, while also providing electrolytes. This aids in performance, exercise, and health.
Total Control (Finish Line)
ElectrolyteElectrolyte
Gut HealthGut Health
PerformancePerformance
VitaminsVitamins
Total Control by Finish Line is a horse supplement containing ingredients to support gut health, joints, hooves, coat quality and red blood cells. It provide electrolytes as well as vitamins and minerals.
Total Energy & Stamina Syringe (Ramard)
CirculationCirculation
EnergyEnergy
MuscleMuscle
StaminaStamina
Total Energy & Stamina from Ramard is a supplement in a syringe that is meant to support how energy is used, muscle stamina and function, and performance. This supplement is also supposed to aid in circulation and reducing cramping.
Total Equine (Total Feeds)
Complete FeedComplete Feed
FiberFiber
Gut HealthGut Health
ProteinProtein
Total Equine is a feed formulated for horses, mules, and donkeys. It contains 15% crude protein and 5% fat. Energy and protein sources include alfalfa meal, rice bran, wheat middlings and soybean meal.
Total Equine Essentials (Total Feeds)
CirculationCirculation
Low NSC FeedsLow NSC Feeds
Mineral BalanceMineral Balance
VitaminsVitamins
Total Equine Essentials is a complete extruded ration balancer intended for horses of all classes and activity levels. It has a low feeding rate and is designed to help to keep the NSC content of the diet low.
Total Equine LNSC (Total Feeds)
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
NutrientsNutrients
Ration BalancerRation Balancer
Total Equine LNSC is a complete ration designed for horses suffering from insulin resistance. It contains a maximum 16% NSC with high 15% crude protein and moderate 5% fat.
Total Gut Health (Ramard)
ColicColic
DigestionDigestion
Gut HealthGut Health
HindgutHindgut
Total Gut Health from AniMed is a digestive health supplement. It is meant to help with absorption and gut health while also decreasing the chance of colic or discomfort in the intestines. It contributes to the protective layers of the bowel and supports normal stool.
Total Gut Health Syringe (Ramard)
ColicColic
Gut HealthGut Health
Mineral BalanceMineral Balance
VitaminsVitamins
Total Gut Health Syringe from Ramard is meant to support the entire digestive tract of horses. It aims to decrease the risk of colic and support gut health. It contains minerals and Vitamin E.
Total Immune Blast (Ramard)
Bone HealthBone Health
ImmunityImmunity
NutrientsNutrients
RespiratoryRespiratory
Total Immune Blast from Ramard is a supplement that can be given to horses or foals to boost immunity. It is meant to help horses recover from illnesses or help assist in preventing them. It can also help fight free radicals, help with breathing, and develop bone marrow.
Total Impact II (CEP)
HealthHealth
JointsJoints
NutrientsNutrients
RecoveryRecovery
Total Impact II by CEP is a powdered joint supplement designed for all working classes of horses. It is formulated with hyaluronic acid, glucosamine, MSM, turmeric and chondroitin sulfate.
Total Lactic Care (Ramard)
Amino AcidAmino Acid
ExerciseExercise
MuscleMuscle
PerformancePerformance
Total Lactic Care from Ramard is a supplement that is meant to help muscles after performance. It can help with muscle fatigue, cramping, and tying up. It contains vitamins, minerals, and amino acids.
Total Nutrition (PharmaSolute)
JointsJoints
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
PharmaSolute Total Nutrition is a powdered supplement for horses and ponies. It contains vitamins, minerals, and ingredients to support joint health.
Total Supplement (Total Supplements)
ImmunityImmunity
Mineral BalanceMineral Balance
RecoveryRecovery
VitaminsVitamins
Total Supplement is a horse supplement that contains vitamins, minerals, amino acids, and probiotics. It can assist with joint support, immunity and muscle recovery.
Total Topline (Ramard)
MuscleMuscle
PerformancePerformance
RecoveryRecovery
ToplineTopline
Total Topline from Ramard is a powdered supplement that aims to build muscle and topline, increase performance, assist in the growth and development of young horses, and help with muscle recovery and maintenance.
Tough as Nails (Tribute)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Tribute Tough As Nails is a pelleted horse supplement formulated to support hoof growth. It contains biotin, calcium, iodine, organic minerals and the amino acid methionine.
Tough To Beet® (Tribute Equine)
EnergyEnergy
FatFat
FiberFiber
PerformancePerformance
Tough To Beet® is a high-fat textured feed formulated with shredded beet pulp, grains and soybean oil. This feed targets mature horses in training to meet their calorie needs.
Track Time (Capstone Horse Feed)
GrowthGrowth
Gut HealthGut Health
HindgutHindgut
PerformancePerformance
Track Time by Capstone Horse Feed is a muesli intended for young horses who are in training and racing.
Tracktorque (Hygain)
DigestionDigestion
EnergyEnergy
Gut HealthGut Health
Skin + HairSkin + Hair
Tracktorque by Hygain is a high-energy feed meant for high performance horses including racing, training, and intense competition. It contains vitamins, minerals, prebiotics, probiotics and is intended to assist with gut health, digestion, coat health, muscle and heart health.
Trail Mix (Running Horse Elite Equine Nutrition)
Complete FeedComplete Feed
FiberFiber
HealthHealth
Mineral BalanceMineral Balance
Running Horse Trail Mix is a concentrated feed containing high fiber, vitamins, minerals, and 12% protein. This feed targets adult horses that are inactive or performing light work.
Trail Time (McCauley’s Equine Formulas)
Complete FeedComplete Feed
Feed EfficiencyFeed Efficiency
Gut HealthGut Health
HealthHealth
Trail Time® is an oat-based textured feed targeted at adult horses at maintenance or in light work. It provides a lower energy density and fat content than other McCauley feeds.
Training Formula (Triple Crown) – [Discontinued]
EnergyEnergy
ExerciseExercise
FatFat
PerformancePerformance
Triple Crown Training Formula is now a discontinued feed which was a high-calorie, high-fat feed designed to meet the energy requirements of exercising horses. Energy sources included oats, molasses, soybeans, beet pulp, alfalfa and wheat middlings.
Tri Amino (Ukele)
Amino AcidAmino Acid
HealthHealth
NutrientsNutrients
ToplineTopline
Uckele Tri Amino is an essential amino acid supplement that is designed to provide lysine, methionine, and threonine. These are the three most common limiting amino acids in the equine diet.
Tribute Ultra (Tribute)
ExerciseExercise
FatFat
NutrientsNutrients
Weight IssuesWeight Issues
Tribute Ultra is intended for hard keepers and horses and ponies in heavy work. This feed is meant to support weight gain and performance with its 12% fat and 12% protein formula.
Trifecta (Buckeye) – [Discontinued]
Complete FeedComplete Feed
FlavorFlavor
NutritionNutrition
PerformancePerformance
Buckeye TRIFECTA™ Sweet Pelleted Feed is a palatable and calorie-dense feed containing cane molasses to increase intake. TRIFECTA™ is intended for performance horses with higher energy demands.
Trifecta (Horse Guard)
HealthHealth
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Trifecta from Horse Guard is a powdered vitamin, mineral, hoof, and joint supplement with added prebiotics and probiotics. It contains glucosamine, MSM, and hyaluronic acid to help with joint support. Trifecta also contains added iron and 32 mg of biotin per serving.
Trifiber Compete (Excel Equine Feeds)
Caloric EnergyCaloric Energy
Low NSC FeedsLow NSC Feeds
PerformancePerformance
Weight IssuesWeight Issues
Trifiber Compete from Excel Equine Feeds is meant for performance horses and has a low NSC content. It is a safe source of calories with fat and fiber. It is made to be beneficial to horses prone to metabolic conditions and horses with weight issues.
Triple Play (Equi-lete)
Gut HealthGut Health
HealthHealth
PerformancePerformance
Weight IssuesWeight Issues
Triple Play by Equi-lete is a vitamin and mineral supplement intended to support gastric health, performance and body condition in hard keepers, performance horses and breeding stock.
Triplify (Excel Equine Feeds)
Competition HorsesCompetition Horses
HealthHealth
NutritionNutrition
PerformancePerformance
Triplify is a textured feed from Excel Equine Feeds. Triplify is intended for horses in moderate to heavy work, and contains 10% protein and 10% fat.
Triumph Active 12 Pellet (Nutrena)
HealthHealth
MuscleMuscle
NutritionNutrition
RecoveryRecovery
Nutrena Triumph® Active 12 Pellet is an 18% NSC feed intended for active mature horses. It contains added methionine and lysine which are meant to support muscle development.
Triumph Complete (Nutrena)
Complete FeedComplete Feed
EnergyEnergy
NutritionNutrition
ProteinProtein
Triumph Complete is a high-fibre, moderate protein and low-fat complete feed formulated with 22% NSC. It is formulated as a hay stretcher that can be used to replace portions of forage.
Triumph Fiber Plus (Nutrena)
DigestionDigestion
EnergyEnergy
FiberFiber
NutritionNutrition
Triumph Fiber Plus is a high fat and fibre complete feed providing 12% protein, 10% fat and 17% NSC. Triumph Fiber Plus is formulated for mature horses of all exercise levels.
Triumph Professional (Nutrena)
Complete FeedComplete Feed
EnergyEnergy
NutritionNutrition
ProteinProtein
Triumph Professional is a pelleted complete feed formulated for a variety of life stages. It provides 14% protein, 8% fat and 17% NSC.
Triumph Professional Pellet Horse Feed (Nutrena)
Complete FeedComplete Feed
FiberFiber
MuscleMuscle
NutritionNutrition
Triumph Professional is a pelleted complete feed that provides 14% protein, 8% fat and less than 17% NSC. It is formulated for a large variety of horses such as broodmares, foals, performance horses, and horses at maintenance.
Triumph Professional Textured 14% Horse Feed (Nutrena)
DigestionDigestion
HealthHealth
Hoof HealthHoof Health
ToplineTopline
Triumph Professional Textured Horse Feed is a concentrate feed for horses of all ages and work levels. It supplies 14% crude protein, 8% crude fat, and 33% sugar and starch.
Triumph Senior Horse Feed (Nutrena)
Complete FeedComplete Feed
Gut HealthGut Health
SeniorSenior
ToplineTopline
Triumph® Senior Horse Feed is a complete feed intended for older horses providing 14% protein, 7% fat and 21% NSC (sugar and starch).
Trouble Free Powder (Kentucky Performance Products)
CalmingCalming
HealthHealth
PerformancePerformance
StressStress
Trouble Free from Kentucky Performance Products is intended to help horses remain relaxed. Trouble Free contains alpha-lactalbumin which is intended to maintain calmness in horses.
Tru Breed (Hygain)
AntioxidantAntioxidant
BroodmareBroodmare
DigestionDigestion
GrowthGrowth
Tru Breed by Hygain is a soy-free extruded feed intended for breeding and growing horses.
Tru Care (Hygain)
DigestionDigestion
NutrientsNutrients
NutritionNutrition
SeniorSenior
Tru Care from Hygain is an extruded feed intended for horses requiring extra calories, such as senior horses. Tru Care contains glucosamine intended to support joint health.
Tryptophan
Amino AcidAmino Acid
IngredientIngredient
MetabolismMetabolism
MuscleMuscle
Tryptophan is an amino acid that is a precursor for serotonin and melatonin. It is sometimes supplemented to horses as a calming aid. However, research in horses suggests that it is not an effective calming additive.
Tuffoal (TRM)
DigestionDigestion
FoalFoal
GrowthGrowth
Gut HealthGut Health
Tuffoal from TRM is a liquid supplement which supports normal gut motility in growing and adult horses. Tuffoal contains kaolinitic clay and pectin for gut motility, as well as fructo - oligosaccharides to stimulate the gastrointestinal tract.
Turbo Mag BCAA (Stride Animal Health)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
ExerciseExercise
HealthHealth
Turbo Mag BCAA from Stride Animal Health is a powdered electrolyte for horses. Turbo Mag BCAA is intended to support hydration levels and replace lost electrolytes.

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