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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.
Performance Vitamins and Minerals (Dodson & Horrell)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
Mineral BalanceMineral Balance
VitaminsVitamins
Performance Vitamins and Minerals from Dodson & Horrell is a pelleted supplement that provides increased micronutrients for performance and breeding horses and ponies. This supplement also contains electrolytes to promote recovery and rehydration.
Perktone (Cox Vet Lab)
Blood CellsBlood Cells
EnergyEnergy
Mineral BalanceMineral Balance
VitaminsVitamins
Perktone is a liquid iron supplement intended to help performance horses with their blood's ability to transport oxygen throughout the body. This may lead to improved performance.
Physique (Equi-lete)
Bone HealthBone Health
EnergyEnergy
HealthHealth
Mineral BalanceMineral Balance
UlcersUlcers
Physique by Equi-lete is a pelleted supplement intended to support bone and tissue health in all horse types.
Pianissimo (Cavalor)
Complete FeedComplete Feed
Easy KeeperEasy Keeper
Metabolic SyndromeMetabolic Syndrome
Ration BalancerRation Balancer
Pianissimo by Cavalor is formulated to be a lower energy feed with lower protein levels and no added oats. This feed is targeted to hot horses to reduce stress.
Pivot (Equi-lete)
HealthHealth
JointsJoints
NutrientsNutrients
RecoveryRecovery
Pivot by Equi-lete is a pelleted joint supplement intended to support cartilage health in all horse types.
Platinum Balance (Platinum Peformance)
DigestionDigestion
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
Platinum Balance by Platinum Peformance is a daily probiotic containing pre and probiotics, it is intended to support digestion and hindgut health in all horse types.
Platinum Hoof Support (Platinum Performance)
Amino AcidAmino Acid
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Platinum Hoof Support is an equine hoof supplement providing biotin, the trace minerals zinc, manganese, copper, and cobalt, and the amino acids L-lysine and L-methionine.
Platinum Performance® Equine Wellness and Performance Formula
EnergyEnergy
FatFat
JointsJoints
Omega 3-6-9Omega 3-6-9
Platinum Performance® Equine Wellness and Performance Formula is a nutritional supplement containing ground flaxseed, stabilized rice bran, montmorillonite (bentonite) clay and a range of vitamins and minerals.
Platinum Refresh (Platinum Performance)
ElectrolyteElectrolyte
HealthHealth
PerformancePerformance
RecoveryRecovery
Platinum Refresh by Platinum Performance is a supplement formulated for horses experiencing inadequate sweat production (anhidrosis). It is designed to help support normal healthy sweating and thermoregulation.
Pleasure Sweet (Buckeye)
Complete FeedComplete Feed
DigestionDigestion
NutritionNutrition
SeniorSenior
Pleasure Sweet is a multi-particle sweet feed with added molasses to improve palatability. This feed supports digestibility and is intended for mature maintenance or lightly worked horses.
Polished (Pryde’s EasiFeed)
Coat QualityCoat Quality
FatFat
Hoof HealthHoof Health
NutrientsNutrients
Polished by Pryde's EasiFeed is a powdered coat and hoof supplement intended for all horse types.
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.
Post Time (McCauley’s Equine Formulas)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Post Time® is a highly palatable textured horse feed providing high digestible energy levels for performance horses. It provides 8% crude fat from vegetable oil, 12% protein, and 11% crude fiber.
Power + (Pivotal)
Amino AcidAmino Acid
Competition HorsesCompetition Horses
MuscleMuscle
PerformancePerformance
Power + By Pivotal is a powdered amino acid and probiotic supplement intended to support overall health in performance horses.
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%).
Power Pak Nitro (Peak Performance Nutrients)
Competition HorsesCompetition Horses
MuscleMuscle
PerformancePerformance
RespiratoryRespiratory
Power Pak Nitro by Peak Performance Nutrients is a performance supplement containing a blend of herbs, amino acids, and minerals. It is indented to support the respiratory system during high levels of work.
Power Pak Surge (Peak Performance Nutrients)
EnergyEnergy
PerformancePerformance
RecoveryRecovery
StaminaStamina
Power Pak Surge by Peak Performance Nutrients is a powdered supplement that contains a blend of amino acids to promote recovery from exercise-induced muscle fatigue and soreness. This supplement also intends to support vascular health and maximize exercise capacity.
PowerGLO (ADM Animal Nutrition)
Caloric EnergyCaloric Energy
ExerciseExercise
PerformancePerformance
Weight IssuesWeight Issues
PowerGLO is a concentrated feed formulated for elite performance horses. It is high in fat and carbohydrates to support the caloric needs of equine athletes.
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 250 (Pryde’s EasiFeed)
PerformancePerformance
ProteinProtein
Ration BalancerRation Balancer
RecoveryRecovery
Premium 250 by Pryde's EasiFeed is a ration balancer containing 25% protein. It is intended for performance horses, and horses recovering from illness or injury.
Premium Horse Pellet AL (Cargill)
DigestionDigestion
ExerciseExercise
NutrientsNutrients
NutritionNutrition
Premium Horse Pellets (AL) by Cargill are intended as a ration balancer for adult horses.
PreOx (HorseTech)
AntioxidantAntioxidant
HealthHealth
ImmunityImmunity
VitaminsVitamins
PreOx from HorseTech is a powdered antioxidant supplement. PreOx contains added vitamins, minerals and added flaxseed. This supplement is intended for horses who require additional antioxidants in their diet.
Prep Mix (Baileys Horse Feeds)
FatFat
GrowthGrowth
NutritionNutrition
ToplineTopline
Baileys Horse Feeds Prep Mix is formulated to provide optimum growth support and condition. This feed is intended for yearlings to 3-year-olds in early training. Prep Mix is oat-free and contains 6.5% of oil, which helps to improve coat quality.
Prepare (Barastoc)
AntioxidantAntioxidant
BroodmareBroodmare
Mineral BalanceMineral Balance
StallionStallion
Prepare by Barastoc is a concentrate that is meant for young horses and broodmares or stallions to assist with preparing for breeding. It contains amino acids, minerals, vitamins, and antioxidants.
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.
Prime Lyte (Prime Performance Nutrition)
ElectrolyteElectrolyte
ExerciseExercise
PerformancePerformance
RecoveryRecovery
Prime Lyte is a buffered electrolyte blend by Prime Performance Nutrition. It is intended to replace electrolytes lost in sweat.
PrimeGLO (ADM Animal Nutrition)
FatFat
Omega 3-6-9Omega 3-6-9
PerformancePerformance
Weight IssuesWeight Issues
PrimeGLO is a concentrated horse feed designed for mature horses. It is a soft, easy-to-chew formulation that contains ingredients to support gut health. The total NSC is 14.5%.
Pro Feed Balancer (Blue Chip Feed)
BroodmareBroodmare
GrowthGrowth
Ration BalancerRation Balancer
StallionStallion
Pro Feed Balancer from Blue Chip Feed is a pelleted ration balancer designed to support hoof, coat, and gut health. This product is intended for performance horses, broodmares, stallions, and young stock.
Pro Horse 12 (MAC)
EnergyEnergy
FatFat
NutrientsNutrients
SeniorSenior
Pro Horse 12 by MAC is a high energy feed with vitamins and minerals, it is intended for mature horses.
Pro Mare (MAC)
BroodmareBroodmare
LactationLactation
Mineral BalanceMineral Balance
NutrientsNutrients
Pro Mare by MAC is a salt-limited supplement intended for lactating or dry mares on hay or pasture.
Pro Mare With Clarifly (MAC)
BroodmareBroodmare
HealthHealth
LactationLactation
NutrientsNutrients
Pro Mare with Clarifly by MAC is a protein, vitamin and mineral supplement. It is intended to control the development of flies in the manure of dry and lactating mares.
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 V.M. with EFAs (Peak Performance Nutrients)
AntioxidantAntioxidant
ElectrolyteElectrolyte
JointsJoints
MuscleMuscle
Pro V.M. with EFAs by Peak Performance Nutrients is a vitamin, mineral, amino acid & probiotic supplement designed with race horses in mind. It intends to support the extreme demands on the horse’s joints, immune system and digestive 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.
Pro-Plus 12 Sweet (Seminole) – [Discontinued]
Amino AcidAmino Acid
Complete FeedComplete Feed
ExerciseExercise
GrowthGrowth
Seminole Pro-Plus 12 Sweet is a now-discontinued oat-based textured feed for growing, breeding, pleasure and performance horses.
PRO-TECT LS (Dove Performance Nutrition)
HealthHealth
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
NutritionNutrition
PRO-TECT LS by Dove Performance Nutrition is a pelleted feed intended for all horse types.
Pro-Vide 10% (West Feeds)
FatFat
FiberFiber
GrainsGrains
NutritionNutrition
Pro-Vide 10% by West Feeds is a feed designed to support the active horse in conjunction with an additional protein source. This feed provides 10% of protein, 5% fat content, and 12% fibre content with added soybean oil and inorganic vitamins and minerals.
Pro24 Supplement (Hoffman’s Horse Products)
Easy KeeperEasy Keeper
Feed EfficiencyFeed Efficiency
HealthHealth
NutritionNutrition
Pro24 Supplement from Hoffman's is a concentrated protein, vitamin, and mineral supplement to support horses over 1 year of age. Pro24 Supplement is intended to be fed with good quality forages and contains no added sugars or starches.
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.
Profecta 10 (Seminole)
Caloric EnergyCaloric Energy
Feed EfficiencyFeed Efficiency
GrainsGrains
YeastYeast
Seminole Profecta 10™ is a pelleted feed providing grains, digestible fibers, yeast and molasses with 21% NSC. It is targeted at active mature horses and ponies.
Profecta 12 (Seminole)
FiberFiber
GrainsGrains
Mineral BalanceMineral Balance
YeastYeast
Seminole Profecta 12 is a pelleted feed intended for mature, active horses and ponies. It has a moderate energy density, yeast culture, and 19% NSC (sugar and starch).
Profecta 14 (Seminole)
FiberFiber
GrainsGrains
Mineral BalanceMineral Balance
YeastYeast
Seminole Profecta 14 is a pelleted feed intended for growing, breeding and performance horses. It contains 14% protein, 7% fat and 24% NSC. This feed is fortified with chelated trace minerals and antioxidants.
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.

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