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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.
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.
Proformance 14 (Excel Equine Feeds)
BroodmareBroodmare
HealthHealth
NutrientsNutrients
PerformancePerformance
Proformance 14 by Excel Equine Feeds is a fortified textured feed intended for broodmares, foals, weanlings, yearlings and performance horses.
Proformance Sales Prep (Excel Equine Feeds)
GrowthGrowth
HealthHealth
NutrientsNutrients
NutritionNutrition
Proformance Sales Prep by Excel Equine Feeds is a textured feed intended to keep growing horses in proper condition for sale day.
Prolong Time (Capstone Horse Feed)
BroodmareBroodmare
Competition HorsesCompetition Horses
DigestionDigestion
StallionStallion
Prolong Time by Capstone Horse Feed is a low glycemic pelleted feed intended for breeding, growing and sport horses.
PROMINENT Textured Horse Feed (BUCKEYE Nutrition)
Competition HorsesCompetition Horses
MuscleMuscle
PerformancePerformance
ProteinProtein
Prominent Textured Horse Feed by Buckeye Nutrition is a complete feed formulated for performance horses. It is palatable and provides 14% protein, 32% NSC and energy from oats, wheat, corn, and soybean oil.
Promita (Mitavite)
Bone HealthBone Health
BroodmareBroodmare
GrowthGrowth
PerformancePerformance
Promita by Mitavite is a high protein extruded feed intended for breeding and performance horses.
ProSetol (Hestevard)
CalmingCalming
Gut HealthGut Health
HealthHealth
RecoveryRecovery
ProSetol by Hestevard is a powdered supplement intended to support nervous horses and ponies.
Prove PRO:formance (Farrier’s Magic)
Caloric EnergyCaloric Energy
FiberFiber
GrainsGrains
NutritionNutrition
Prove PRO:formance is a complete grain ration intended to help provide horses, of all ages and levels of work, with all the needed nutrients that they might not have if only fed pasture or hay.
PulmonAID Paste (Kelato)
RecoveryRecovery
RespiratoryRespiratory
StaminaStamina
VitaminsVitamins
PulmonAID Paste from Kelato is syringed version of the supplement that can be used for performance horses to support lung health and proper function. It can contribute to increased stamina and can assist in inflammatory recovery.
Pur-Athlete (Purina)
Complete FeedComplete Feed
ExerciseExercise
FatFat
PerformancePerformance
Pur-Athlete™ is an extruded fat supplement containing vegetable oil and flaxseed. It is formulated to provide added energy and nutrients for performance horses. This supplement also supports coat, skin, and hoof conditions.
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.
Pure Balance (Pure Feed Company)
Easy KeeperEasy Keeper
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Pure Balance by Pure Feed Company is a pelleted horse feed that supports health and vitality. It is free from molasses and wholegrain cereals and contains linseed to encourage healthy coat condition and shine.
Pure Condition Mix (Pure Feed Company)
FatFat
MuscleMuscle
Omega 3-6-9Omega 3-6-9
PerformancePerformance
Pure Condition Mix by Pure Feed Company is a textured horse feed that promotes positive behaviour and helps to improve muscle development. It supports digestive health and supplies calm energy to the horse.
Pure Condition Pellets (Pure Feed Company)
DentalDental
FatFat
Omega 3-6-9Omega 3-6-9
ToplineTopline
Pure Condition Pellets by Pure Feed Company is a pelleted horse feed that intends to assist with muscle development. Pure Condition Pellets contain a high oil content to promote weight gain.
Pure dl-Methionine Powder (AniMed)
Amino AcidAmino Acid
IngredientIngredient
Liver HealthLiver Health
Skin + HairSkin + Hair
This supplement from AniMed contains pure dl-Methionine which is an essential amino acid. Amino acids contribute to metabolism and growth, and it also supports the normal structure of hair, skin, and hooves. Methionine can also help with liver health.
Pure Easy (Pure Feed Company)
EnergyEnergy
ExerciseExercise
Mineral BalanceMineral Balance
VitaminsVitamins
Pure Balance by Pure Feed Company is a pelleted horse feed that supports health and vitality. It is free from molasses and wholegrain cereals and contains linseed to encourage healthy coat condition and shine.
Pure Fibre Balance (Pure Feed Company)
Easy KeeperEasy Keeper
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Pure Fibre Balance by Pure Feed Company is a textured horse feed for easy keepers that includes vitamins and minerals. It is a high fibre content to support gut health and is low in calories to prevent unwanted weight gain.
Pure L-Lysine Powder (AniMed)
Amino AcidAmino Acid
GrowthGrowth
IngredientIngredient
Skin + HairSkin + Hair
Pure L-Lysine Powder from AniMed is a single ingredient supplement that contains the amino acid lysine. Lysine helps with growth and development. It also contributes to the health of hooves and coat condition.
Pure L-Tryptophan Powder (AniMed)
Amino AcidAmino Acid
CalmingCalming
IngredientIngredient
StressStress
AniMed's Pure L-Tryptophan Powder contains the amino acid tryptophan. This amino acid contributes to mood while relieving panic and anxiety. It is supposed to be 100% digestible.
Pure Lysine (Vita Flex)
Amino AcidAmino Acid
HealthHealth
NutrientsNutrients
ToplineTopline
Vita Flex Pure Lysine is an essential amino acid supplement for horses containing L-Lysine HCI. This is often the most limiting amino acid in the horse's diet.
Pure Performance (Pure Feed Company)
EnergyEnergy
MuscleMuscle
NutrientsNutrients
PerformancePerformance
Pure Performance by Pure Feed Company is a textured feed that contains oats to provide an instant energy source. It also has oil that gives your horse sustained and controlled power and fibre to be kind to the digestive system.
Pure Stud (Pure Feed Company)
Caloric EnergyCaloric Energy
GrowthGrowth
NutrientsNutrients
StallionStallion
Pure Stud by Pure Feed Company is a textured feed which supports bone development and is low in starch. Pure Stud provides growing horses with the essential nutrients they require for proper growth.
Pure Veteran Mix (Pure Feed Company)
Caloric EnergyCaloric Energy
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
Pure Veteran Mix by Pure Feed Company is a textured feed formulated with high levels of vitamins and minerals for older horses. It is free from molasses and maintains topline and muscle tone through easily digested protein.
Pure Veteran Pellets (Pure Feed Company)
Caloric EnergyCaloric Energy
DentalDental
Mineral BalanceMineral Balance
SeniorSenior
Pure Veteran Pellets by Pure Feed Company is a pelleted feed designed to help older horses with very poor dentition. It is formulated with high levels of vitamins and minerals and is free from molasses.
Pure Working (Pure Feed Company)
Competition HorsesCompetition Horses
FatFat
NutritionNutrition
Weight IssuesWeight Issues
Pure Working by Pure Feed Company is a textured horse feed that provides extra stamina without spooking. It has a high amino acid content for topline muscle development and is an All-in-one feed with vitamins and minerals.
Purina Ultium Senior Horse Feed (Purina)
FatFat
FiberFiber
Low NSC FeedsLow NSC Feeds
SeniorSenior
Purina Ultium Senior Horse Feed is a high-fibre, high-fat, low-starch, low-sugar pelleted extruded feed specially formulated for senior horses.
QuadraCare (The Mill)
DigestionDigestion
HealthHealth
Hoof HealthHoof Health
JointsJoints
QuadraCare from The Mill is a pelleted hoof, digestion, and joint supplement. QuadraCare is intended to support joint health, digestive function, and hoof quality in horses.
RACE ‘N WIN Textured Feed (BUCKEYE Nutrition)
Complete FeedComplete Feed
EnergyEnergy
Gut HealthGut Health
PerformancePerformance
RACE 'N WIN is a textured feed designed for performance horses who require high-energy feed. It also contains added amino acids, beet pulp, probiotics, and prebiotic ingredients.
Race 13 (Capstone Horse Feed)
Competition HorsesCompetition Horses
DigestionDigestion
EnergyEnergy
PerformancePerformance
Race 13 by Capstone Horse Feed is a high energy feed intended for high performance horses.
Race First (Excel Equine Feeds)
Competition HorsesCompetition Horses
HealthHealth
NutritionNutrition
PerformancePerformance
Race First is a textured feed from Excel Equine Feeds. Race First is intended for horses in heavy work, and contains ingredients intended to support digestive health.
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.
Race Lite Muesli (Dodson & Horrell)
Amino AcidAmino Acid
ExerciseExercise
Mineral BalanceMineral Balance
PerformancePerformance
Race Lite Muesli is a textured lower protein racing feed made for horses beginning training or on a lighter training schedule. This feed contains a protein content of 12%, a fibre level of 9%, and moderate fat content of 4.5%.
Race Mix (Dunstan)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Race Mix by Dunstan is a complete, balanced feed providing working horses with protein, energy, vitamins and minerals for performance and health.
Race Ready GT (Purina)
Competition HorsesCompetition Horses
DigestionDigestion
EnergyEnergy
PerformancePerformance
Purina® Race Ready® GT is a textured feed intended for equine athletes and race horses. It is designed to provide a higher energy density and gut support ingredients to meet the needs of performance horses.
Race Ready® Horse Feed (Purina Mills)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
Gut HealthGut Health
PerformancePerformance
Race Ready is a high-energy textured feed targeted to meet the calorie requirements of racehorses. It provides 12% crude protein, 8% crude fat, 9% fibre, and contains molasses and vegetable oil.
Race Time (Capstone Horse Feed)
AntioxidantAntioxidant
HealthHealth
NutritionNutrition
SeniorSenior
Race Time by Capstone Horse Feed is a muesli style feed intended for mature horses.
Racehorse Cubes (Dodson & Horrell)
Competition HorsesCompetition Horses
FatFat
GrainsGrains
NutritionNutrition
Racehorse Cubes is a feed designed for racehorses in full training. This feed is high in NSC to give the horses an energy boost. It is also high in protein for proper muscle building and includes some ricebran to support a good body condition.
Racing Balancer (Dodson & Horrell)
GrainsGrains
PerformancePerformance
ProteinProtein
Ration BalancerRation Balancer
Racing Balancer is a feed intended to balance a racehorse's diet and meant to be fed alongside oats. This feed adds additional protein required for muscle building, recovery, and the vitamins and minerals needed for proper nutrient absorption.
Racing Cube (Pryde’s EasiFeed)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
EnergyEnergy
PerformancePerformance
Racing Cube by Pryde's EasiFeed is a complete feed in extruded cube form. It is intended for race, performance and sport horses.
Racing Feed Balancer (TopSpec)
Competition HorsesCompetition Horses
NutritionNutrition
PerformancePerformance
Ration BalancerRation Balancer
Racing Feed Balancer from TopSpec is ideal for Racehorses at rest or in work and trotters. This ration balancer supports digestive efficiency, recovery, muscle development, hoof quality, and coat condition.
Radiate (Excel Equine Feeds)
HealthHealth
NutrientsNutrients
NutritionNutrition
Weight IssuesWeight Issues
Radiate from Excel Equine Feeds is a pelleted feed. This feed is intended for hard keepers. Radiate contains 12% protein and 10% fat.
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 (Woody’s Horse Nutrition)
DigestionDigestion
Grain FreeGrain Free
ProteinProtein
Ration BalancerRation Balancer
Woody’s Feed Ration Balancer is a concentrated, pelleted feed intended to balance a forage-based diet. It provides chelated trace minerals and added probiotics. This feed is intended for all horses and ponies at any level of 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.
Recovery (Vita Flex)
Amino AcidAmino Acid
ElectrolyteElectrolyte
ExerciseExercise
RecoveryRecovery
Vita Flex Recovery is an equine supplement intended to support post-exercise recovery. It contains amino acids, B-vitamins, and electrolyte ingredients.
Red Cal GROW (Natural Horse Vet)
ElectrolyteElectrolyte
HydrationHydration
Mineral BalanceMineral Balance
NutrientsNutrients
Red Cal GROW by Natural Horse Vet is a granular supplement with added biotin, lysine, and methionine. It is intended for all life stages of horses and other livestock. It provides salt, minerals, and electrolytes.

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