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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.
KoolSpeed Plus (MAC)
Competition HorsesCompetition Horses
EnergyEnergy
NutritionNutrition
PerformancePerformance
KoolSpeed Plus by MAC is a feed intended to minimize incidences and/or severity of gastric ulcers. It is intended to be used in horses undergoing heavy exercise.
L-Arginine AKG (Peak Performance Nutrients)
Amino AcidAmino Acid
CirculationCirculation
ImmunityImmunity
PerformancePerformance
L-Arginine AKG by Peak Performance Nutrients is a supplement for performance horses in training. It contains purely L-Arginine AKG, which helps support the levels of amino acids that allow more oxygen into the muscles for better performance.
L-Leucine (Uckele)
Amino AcidAmino Acid
IngredientIngredient
MuscleMuscle
NutrientsNutrients
L-Leucine is a branched-chain amino acid supplement proposed to aid in muscle growth, recovery, and maintenance of exercising horses. L-Leucine is designed to support horses during exercise as it is a valuable energy source. It provides 9.85 grams of L-Leucine per scoop.
L-Lysine (MVP)
Amino AcidAmino Acid
IngredientIngredient
MuscleMuscle
ProteinProtein
L-Lysine from MVP is a pure amino acid supplement for horses that intends to support muscle growth, topline, immune function and hoof health. L-Lysine is the first limiting amino acid in the equine diet.
Laktese Ex Oral Syringe (Hestevard)
AntioxidantAntioxidant
ElectrolyteElectrolyte
MuscleMuscle
RecoveryRecovery
Laktese Ex Oral Syringe by Hestevard is a paste supplement intended to support muscle function and energy metabolism in all types of horses and ponies.
LAM Essentials (EquiFeast)
CalmingCalming
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
VitaminsVitamins
LAM Essentials by EquiFeast is a mineral and vitamin supplement. It is intended for horses at risk for metabolic problems. It contains chelated calcium which is meant to optimize behaviour, hormones, and neurotransmitter support.
Lamina Formula (Life Data)
FiberFiber
Hoof HealthHoof Health
Mineral BalanceMineral Balance
NutrientsNutrients
Lamina Formula by Life Labs is intended to support the laminae of horses with acute or chronic laminitis. It provides protein, vitamins and minerals to support hoof health.
LaminaSaver (Figuerola Labs)
AntioxidantAntioxidant
Bone HealthBone Health
HealthHealth
RecoveryRecovery
LaminaSaver by Figuerola Labs is a powdered supplement designed to support bone health. It is formulated with biotin, antioxidants, and methionine.
Laminex (MVP)
AntioxidantAntioxidant
CirculationCirculation
JointsJoints
Metabolic SyndromeMetabolic Syndrome
Laminex by MVP is a pelleted supplement meant to help support healthy joint function, blood sugar levels, and hoof growth. It contains MSM, magnesium, biotin, and devil's claw.
Lamivite (Equestrizone)
AntioxidantAntioxidant
Gut HealthGut Health
HindgutHindgut
NutrientsNutrients
Lamivite from Equestrizone is a blend of naturally sourced antioxidants and micronutrients to support a high fibre, low concentrate diet. It supports healthy stomach and hindgut functions in horses.
Leading Edge – Textured (Brooks)
AntioxidantAntioxidant
Competition HorsesCompetition Horses
PerformancePerformance
PrebioticPrebiotic
Leading Edge - Textured by Brooks is a feed and is intended for horses in competition or training.
Leading Edge (Manna Pro)
Complete FeedComplete Feed
FoalFoal
GrowthGrowth
ProteinProtein
Leading Edge by Manna Pro is an equine feed intended for all classes of horses. It contains 14% crude protein and 6% crude fat from sources such as wheat middlings, corn, soy hulls, and vegetable oil.
Legacy 16% Mare & Foal Ration (CO-OP)
FoalFoal
GrowthGrowth
LactationLactation
MareMare
Legacy 16% Mare & Foal Ration is a higher-protein feed intended for broodmares and growing foals. These horses benefit from higher levels of amino acids in the diet.
Legend (Barastoc)
Gut HealthGut Health
HealthHealth
NutrientsNutrients
Weight IssuesWeight Issues
Legend from Barastoc is a feed that is oat free. It is low in starch and it can contribute to weight gain and body condition. It is meant to help with gut health and provides minerals and vitamins.
Leucine
Amino AcidAmino Acid
MuscleMuscle
ProteinProtein
RecoveryRecovery
L-Leucine is an amino acid that plays a role in muscle growth and protein synthesis for horses. Like other BCAAs, it is sometimes supplemented for performance horses.
Levelor (Meal) (MVP)
CalmingCalming
HerbHerb
MareMare
StressStress
Levelor by MVP is a premixed supplement for mares and geldings that intends to support the hormonal/nervous system. It contains taurine and magnesium that intend to promote calmness and raspberry leaf for hormonal support.
Life Time Balancer (Capstone Horse Feed)
HealthHealth
NutrientsNutrients
ProteinProtein
Ration BalancerRation Balancer
Life Time Balancer by Capstone Horse Feed is a pelleted balancer supplement intended for all horse types.
Limited (Bluebonnet Feeds)
HealthHealth
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
Ration BalancerRation Balancer
Limited by Bluebonnet is a ration balancer containing no soy, corn, wheat, oats, molasses, beet pulp, flax or cottonseed. It is intended for sensitive or allergy-prone horses.
Liqui Lyte (Uckele)
ElectrolyteElectrolyte
ExerciseExercise
HydrationHydration
RecoveryRecovery
Liqui Lyte is a liquid electrolyte supplement that supplies calcium, sodium, chloride, and magnesium lost in sweat. It utilizes maltodextrin as a simple sugar to increase electrolyte absorption.
Lite (Pegasus)
HealthHealth
Low NSC FeedsLow NSC Feeds
NutritionNutrition
PerformancePerformance
Lite by Pegasus is a horse feed intended for performance and pleasure horses. Lite contains essential nutrients, vitamins and minerals intended to support horses' wellbeing.
Lite (Triple Crown)
FiberFiber
HealthHealth
Metabolic SyndromeMetabolic Syndrome
Weight IssuesWeight Issues
Triple Crown Lite is a palatable, low-calorie, high-fiber pellet fortified with vitamins and minerals. This feed is intended for horses or ponies prone to laminitis and insulin resistance and tends to gain weight easily. This feed has an NSC of 9.5%.
Lite Ration Balancer (Lifeline)
BroodmareBroodmare
GrowthGrowth
LactationLactation
NutrientsNutrients
Lite Ration Balancer by Lifeline is a pelleted supplemented intended for growing horses and pregnant/lactating broodmares.
LMF California Complete (LMF Horse Feeds)
Complete FeedComplete Feed
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
LMF California Complete is a pelleted feed formulated as an alternative to diets containing pure alfalfa hay. It contains highly digestible fibre from beet pulp, alfalfa hay and soyhulls.
LMF Gold (LMF Horse Feed)
EnergyEnergy
ExerciseExercise
Gut HealthGut Health
NutritionNutrition
LMF Gold is a high calorie textured feed intended to support performance and weight gain in horses. Additionally it provides vitamins, minerals and fibre sources.
LMF Pro-Pellet (LMF Horse Feeds)
Complete FeedComplete Feed
JointsJoints
Mineral BalanceMineral Balance
VitaminsVitamins
LMF Pro-Pellet is a textured high-fiber feed for performance horses in moderate to heavy work. It contains 12% crude protein, and 3.3% fat, along with bio-available trace minerals, organic selenium, live yeast culture, and glucosamine.
LMF Senior (LMF Horse Feeds)
Complete FeedComplete Feed
FiberFiber
JointsJoints
SeniorSenior
LMF Senior is a pelleted complete feed for aged horses. It contains ingredients to support joint and gut health.
LMF Senior Low Carb (LMF Horse Feeds)
Complete FeedComplete Feed
Grain FreeGrain Free
JointsJoints
SeniorSenior
LMF Senior Low Carb feed is a soybean- and alfalfa-based feed for mature horses. It contains 13% crude protein, 8% fat, and 8% NSC.
LMF Super Supplement G NW (LMF Horse Feeds)
Mineral BalanceMineral Balance
Omega 3-6-9Omega 3-6-9
ProteinProtein
VitaminsVitamins
LMF Super Supplement G NW is a ration balancer that contains the essential vitamins and minerals to complement a forage diet. It is a low intake balancer that includes nutrient sources such as soybean meal, barley, and wheat.
LMF Super Supplement NW A (LMF Horse Feeds)
Easy KeeperEasy Keeper
HealthHealth
NutritionNutrition
Ration BalancerRation Balancer
LMF Super Supplement is a ration balancer from LMF Horse Feeds. This feed is intended for easy keepers, and contains vitamins and minerals to balance a forage based diet.
LMF Taco (LMF Horse Feeds)
Complete FeedComplete Feed
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
LMF Taco is a complete feed intended for horses of all classes. It contains 12% crude protein and 2.5% fat from timothy and alfalfa hay, corn and oats. This feed is made with cane molasses to encourage palatability.
Lone Star Trace MS-051120 (HorseTech)
Mineral BalanceMineral Balance
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Lone Star Trace MS-051120 is a custom vitamin and mineral supplement for horses. It contains milled flaxseed, added amino acids and organic trace minerals.
Low ‘N Steady (Buckeye)
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
NutrientsNutrients
SeniorSenior
Low 'N Steady by Buckeye is a low NSC (8.5%) ration balancer intended for mature horses, and metabolic horses or ponies.
Low GI Cube (Barastoc)
EnergyEnergy
GrowthGrowth
NutrientsNutrients
PerformancePerformance
Barastoc's Low GI Cube is a cubed feed that is low in sugar. It contains energy that can be released slowly and can be given to performance horses, breeding horses, or growing horses.
Low Non-Structural Carbohydrate Feed (LMF Horse Feeds)
Amino AcidAmino Acid
Low NSC FeedsLow NSC Feeds
Mineral BalanceMineral Balance
VitaminsVitamins
This feed from LMF Horse Feeds contains low levels of starch and sugar. It is a pelleted feed that is meant to provide minerals, vitamins, amino acids, and omega fatty acids.
Low Starch (Triple Crown)
Complete FeedComplete Feed
Grain FreeGrain Free
Metabolic SyndromeMetabolic Syndrome
SeniorSenior
Triple Crown Low Starch is a pelleted feed containing a lower level of 13.5% NSC. It has no corn, molasses or alfalfa meal which can cause excitability in horses.
Low Starch Omega Plus (Equine Advantage)
Caloric EnergyCaloric Energy
FatFat
FiberFiber
NutritionNutrition
Low Starch Omega Plus is intended for horses that need moderate to significant calories added to their diet. This diet is suitable for horses with Insulin Resistance, Cushing's Disease, and PSSM due to the low NCS.
LQ-Performance (DAC)
HealthHealth
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
LQ-Performance by DAC is a liquid vitamin and mineral supplement. It is formulated with chelated trace minerals, selenium, and chromium.
Lysine Hydrochloride (HCl) – 98.5%
Amino AcidAmino Acid
Coat QualityCoat Quality
Hoof HealthHoof Health
MuscleMuscle
Lysine Hydrochloride is a form of lysine supplement that provides approximately 80% L-Lysine. This essential amino acid is considered the first limiting amino acid in the equine diet.
M V Balancer Lite (Matrix)
FiberFiber
NutrientsNutrients
Ration BalancerRation Balancer
VitaminsVitamins
M V Balancer Lite by Matrix is a lower protein ration balancer that supplies 10% protein. It is designed for horses that don't require high protein in their diet.
M V Balancer Original (Matrix)
NutrientsNutrients
ProteinProtein
Ration BalancerRation Balancer
VitaminsVitamins
M V Balancer Original by Matrix is a pelleted ration balancer with a high protein content of 20%. It supplies a concentrated level of vitamins and minerals.
M30 (McCauley’s)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
PerformancePerformance
M30 by McCauley's is a supplement intended to balance the diet of all horse types.
MagCalm (Equestrizone)
CalmingCalming
EnergyEnergy
IngredientIngredient
PerformancePerformance
MagCalm from Equestrizone is a natural equine calming supplement with equal parts magnesium and potassium to help ease horses who become anxious or over-excited. It can also support stamina and energy levels.
Magic Mineral (Farrier’s Magic)
Coat QualityCoat Quality
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Magic Mineral is a supplement intended for equines of all ages. The supplement helps support healthy hooves and coats.
Magnequin (Hestevard)
Amino AcidAmino Acid
CalmingCalming
HealthHealth
VitaminsVitamins
Magnequin by Hestevard is a liquid supplement intended to support a healthy nervous system in all types of horses and ponies.
Maintenance Horse Ration (Hoffman’s Horse Products)
FiberFiber
HealthHealth
Low NSC FeedsLow NSC Feeds
Ration BalancerRation Balancer
Hoffman's Maintenance Horse Ration is a pelleted feed with lower energy density for horses at maintenance or in light work. Calories are provided by soybean hulls, stabilized rice bran, wheat mill run, malt sprouts and oat hulls.
Mare & Foal (Matrix)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Mare & Foal by Matrix is a pelleted complete feed formulated for broodmares and growing foals. It provides a high level of protein (16%) and moderate fat (5%) to meet the demands of gestation and growth.
Mare & Foal (Running Horse Elite Equine Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Running Horse Elite Mare & Foal is a high-fat feed that contains 16% protein and 9% fat from sources such as wheat middlings, rice bran, and soybean oil. This feed is targeted at pregnant, lactating, and growing horses.
Mare & Foal (Seminole)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Seminole Mare & Foal™ is a textured feed designed for foals, weanlings, and late-gestation or lactating broodmares. This oat-based feed contains corn, digestible fibre, added lysine, and chelated trace minerals.
Mare Cube (Excel Equine Feeds)
BroodmareBroodmare
GrowthGrowth
NutrientsNutrients
NutritionNutrition
Mare Cube by Excel Equine Feeds is a cubed feed fortified with protein, amino acids, vitamins and minerals. It is intended for broodmares and growing horses.
Mare Mineral (Dunstan)
BroodmareBroodmare
ImmunityImmunity
Mineral BalanceMineral Balance
NutritionNutrition
Mare Mineral by Dunstan is a pelleted feed containing vitamins and minerals. It is intended for pregnant mares.

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