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L-Lysine - Feed Ingredient

L-Lysine is an essential amino acid that plays a vital role in protein synthesis, tissue repair, and growth in horses. It is one of the key building blocks of proteins and is necessary for the production of enzymes, hormones, and antibodies. Since horses cannot synthesize L-Lysine on their own, it must be obtained through their diet.

In equine nutrition, L-Lysine is often included in feed formulations and supplements to ensure adequate levels of this essential amino acid. It is particularly important for growing horses, lactating mares, and performance horses, as it supports muscle development, immune function, and overall health. Adequate L-Lysine intake is crucial for optimizing the nutritional balance of equine diets and ensuring proper growth and maintenance.

The following equine feeds, supplements and products contain L-Lysine 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.
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.
SafeChoice Maintenance (Nutrena)
Complete FeedComplete Feed
DigestionDigestion
FiberFiber
NutritionNutrition
Nutrena SafeChoice Maintenance is a pelleted horse feed that provides a maximum of 25% NSC (20% starch and 5% sugar). It is intended as a low-starch feed to maintain body condition.
SafeChoice Mare & Foal Pellet (Nutrena)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
SafeChoice Mare & Foal Pellet is a horse feed intended for pregnant or lactating mares, weanlings, and yearlings. It contains a maximum of 22% NSC with higher protein meant to meet the needs of growing horses.
SafeChoice Mare & Foal Textured (Nutrena)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Nutrena SafeChoice Mare & Foal Textured is a texturized feed intended for pregnant or lactating mares, weanlings, and yearlings. It contains a maximum of 30% NSC and 16% protein meant to meet the needs of growing horses.
SafeChoice Original (Nutrena) – [DISCONTINUED]
Complete FeedComplete Feed
Gut HealthGut Health
HealthHealth
Ration BalancerRation Balancer
Nutrena SafeChoice Original is a pelleted horse feed intended to meet the nutritional needs of a wide range of horses. It provides 22% NSC with 14% protein and 7% fat. SafeChoice Original is now SafeChoice All Stages.
SafeChoice Perform Pellet (Nutrena)
Competition HorsesCompetition Horses
EnergyEnergy
ExerciseExercise
NutritionNutrition
SafeChoice Perform is a pelleted feed intended to meet the needs of hard keepers and performance horses. It contains 14% crude protein, 9% crude fat, and 24% NSC.
SafeChoice Perform Textured (Nutrena)
Competition HorsesCompetition Horses
EnergyEnergy
ExerciseExercise
NutritionNutrition
Nutrena SafeChoice Perform Textured is a high-fat high-calorie feed. It is intended for horses with higher energy requirements, including performance horses and hard keepers.
SafeChoice Senior (Nutrena)
Coat QualityCoat Quality
DentalDental
SeniorSenior
Weight IssuesWeight Issues
SafeChoice Senior is an easy-to-chew, high-fat, controlled starch feed intended for older horses. It is meant to support horses experiencing age-related weight loss, fatigue, or horses with muscle or coat quality issues.
SafeChoice Senior LM (Nutrena)
Coat QualityCoat Quality
DentalDental
SeniorSenior
Weight IssuesWeight Issues
SafeChoice Senior LM is a lower-molasses (LM) high-starch feed intended for senior horses, particularly horses that need to gain weight or have dental issues. It contains 14% crude protein, 8% crude fat, and 18.5% NSC.
SafeChoice Special Care (Nutrena)
Complete FeedComplete Feed
Easy KeeperEasy Keeper
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
SafeChoice Special Care by Nutrena is a controlled starch formula intended for horses with metabolic concerns and easy keepers. It is a corn-free feed that contains a maximum of 7% dietary starch and 3% sugar.
Salute (Dunstan)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Salute by Dunstan is a high energy, complete feed formulated for working horses. It utilizes a combination of highly palatable energy sources to meet the energy demands of race horses.
Security (Doctor’s Choice Supplements)
JointsJoints
PerformancePerformance
Ration BalancerRation Balancer
SeniorSenior
Security by Doctor's Choice Supplement is an organic ration balancer intended for mature and performance horses. It contains glucosamine, chondroitin, and yucca to support joint health.
Select Alfalfa (Select The Best)
Amino AcidAmino Acid
Mineral BalanceMineral Balance
VitaminsVitamins
YeastYeast
Select Alfalfa by Select The Best is a pelleted supplement ration balancer that intends to provide the vitamins, minerals, amino acids, and digestive support to balance diets mainly comprised of alfalfa hay.
Select Grass (Select The Best)
DigestionDigestion
Mineral BalanceMineral Balance
VitaminsVitamins
YeastYeast
Select Grass by Select The Best is a pelleted ration balancer that intends to provide the vitamins, minerals, amino acids, and digestive support to balance diets mainly comprised of grass.
Senior (Equine Advantage)
FatFat
FiberFiber
GrainsGrains
SeniorSenior
Senior by Equine Advantage is a textured feed intended to provide mature horses with essential nutrients. Ingredients such as shredded beet pulp & soybean hulls increase digestibility.
Senior (Hygain)
HealthHealth
ImmunityImmunity
NutritionNutrition
SeniorSenior
Senior from Hygain is a textured feed intended for senior horses. Senior contains added glucosamine intended to support joint health. This feed also contains added amino acids intended to support muscle development.
Senior (Running Horse Elite Equine Nutrition)
DigestionDigestion
Feed EfficiencyFeed Efficiency
SeniorSenior
Weight IssuesWeight Issues
Running Horse Nutrition Senior is a highly digestible feed providing 14% protein, vegetable fat, and micro-nutrients. This feed targets older horses to help them maintain their body condition.
Senior (Sollio Agriculture)
HealthHealth
ImmunityImmunity
NutritionNutrition
SeniorSenior
Senior from Sollio Agriculture is a complete pelleted feed intended for senior horses. This feed is intended to provide energy and essential amino acids for aging horses.
Senior (Triple Crown)
Complete FeedComplete Feed
FatFat
Grain FreeGrain Free
SeniorSenior
Triple Crown Senior is a grain-free, beet pulp-based, high-fat feed designed to meet the needs of older horses. It provides 17% fiber and can be fed as the sole ration for horses unable to eat forage due to dental issues.
Senior Active + (Triple Crown)
HealthHealth
NutritionNutrition
SeniorSenior
Weight IssuesWeight Issues
Senior Active + from Triple Crown is an extruded pelleted intended for older horses or hard keepers. This feed is intended for horses with metabolic issues.
Senior Balancer (Buckeye)
JointsJoints
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
Buckeye SENIOR BALANCER is a pelleted ration balancer for mature horses. It provides vitamins, minerals and amino acids and contains the joint supplement MSM.
Senior Care (Banks Mill Feeds)
FiberFiber
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
Banks Mill Feeds Senior Care is an easy-to-chew pelleted feed intended for senior horses with dental issues. It is meant to be made into a mash and provides high fiber content to replace forage.
Senior Feed (DuMOR)
Complete FeedComplete Feed
DentalDental
NutritionNutrition
SeniorSenior
Senior Feed by DuMOR is an easy-to-chew formulation for older horses. It contains added biotin to support hooves, 14% crude protein, 4% crude fat, and 19.5% crude fibre.
Senior Formula (Bartlett Milling) [Discontinued]
Feed EfficiencyFeed Efficiency
FlavorFlavor
SeniorSenior
Weight IssuesWeight Issues
Bartlett Senior Formula is a molasses-sweetened pellet formulated for senior horses by Kentucky Equine Research. It provides 13% protein and 5% fat in an easy-to-chew pellet.
Senior Formula (Seminole)
AntioxidantAntioxidant
Complete FeedComplete Feed
Gut HealthGut Health
SeniorSenior
Seminole Senior Formula™ is a textured feed formulated to meet the needs of senior horses. This easy-to-chew feed is beet pulp-based and contains rice bran, molasses and soybean oil for energy.
Senior GC Pelleted Feed (BUCKEYE Nutrition)-[Discontinued]
Complete FeedComplete Feed
HealthHealth
JointsJoints
SeniorSenior
Senior GC is a now-discontinued pelleted feed from Buckeye Nutrition targeted to older horses with functional teeth. Senior GC provided glucosamine, chondroitin, and MSM to support joint health.
Senior Gold (Triple Crown)
DentalDental
DigestionDigestion
FatFat
SeniorSenior
Triple Crown Senior Gold is a grain-free, beet pulp-based soft feed intended for older horses. It contains 14.5% protein, 12.5% fat and 9% NSC. Senior Gold can be mixed with water to form a mash for horses with dental issues or prone to choke.
Senior Health & Wellness (Farnam)
Gut HealthGut Health
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
Farnam's Senior Health & Wellness supplement is formulated for senior horses in light work or at maintenance. Senior Health and Wellness is an extruded nugget feed containing amino acids, vitamins, and minerals for horses on a forage-only diet.
Senior HF (Excel Equine Feeds)
DigestionDigestion
HealthHealth
SeniorSenior
Weight IssuesWeight Issues
Senior HF by Excel Equine Feeds is a textured feed intended to be palatable for senior horses with weight issues or needing digestive support.
Senior Horse (Sprout)
Amino AcidAmino Acid
NutrientsNutrients
SeniorSenior
VitaminsVitamins
Senior Horse by Sprout is a pelleted maintenance feed specially formulated for senior horses. It contains added lysine and biotin.
Senior Horse Pelleted (Agrimaster)
DigestionDigestion
HealthHealth
ImmunityImmunity
SeniorSenior
Senior Horse Pelleted by Agrimaster is a pelleted feed intended to meet the nutritional requirements of senior horses.
Senior Horse Rations (Jones Horse Feeds)
Complete FeedComplete Feed
FatFat
Gut HealthGut Health
SeniorSenior
Jones Senior Horse Pellet is a complete feed designed with a high fat content (10%) from rice bran. It also contains elevated levels of protein, vitamins and minerals to support mature horses.
Senior Needs (Excel Equine Feeds)
DigestionDigestion
ImmunityImmunity
SeniorSenior
VitaminsVitamins
Senior Needs from Excel Equine Feeds is a textured feed meant for seniors to help support digestion, immunity, and skeletal strength. It is readily digestible and contains minerals and vitamins.
Senior Pellet (Right Choice)
FatFat
FiberFiber
NutritionNutrition
SeniorSenior
Senior by Right Choice is a pelleted complete feed intended for senior horses with elevated protein. It contains 14% protein, 7% fat, and 19% NSC.
Senior Pelleted (Woody’s Horse Nutrition)
DigestionDigestion
FiberFiber
Gut HealthGut Health
SeniorSenior
Woody's Senior Pelleted is a complete pelleted grain-free feed intended for senior horses. It contains digestible fibre sources for horses that can no longer chew long-stem hay.
Senior Plus (Excel Equine Feeds)
FatFat
FiberFiber
SeniorSenior
Weight IssuesWeight Issues
Senior Plus from Excel Equine Feeds is a feed that helps senior horses maintain their body weight. It is high in fat and fiber to help encourage weight gain for thinner horses. It is low in starch and sugar, and is good for hard keepers.
Senior Ration (Hoffman’s Horse Products)
Complete FeedComplete Feed
Feed EfficiencyFeed Efficiency
SeniorSenior
Weight IssuesWeight Issues
Hoffman's Senior Horse Ration is a feed designed for senior horses that need extra caloric energy to maintain weight. This feed contains 17.5% NSC with moderate fat content (5%) and high fibre content (24%).
Senior Sport (Tribute)
Complete FeedComplete Feed
ExerciseExercise
FiberFiber
SeniorSenior
Tribute Senior Sport™ is a high calorie feed for mature performance horses. It provides 16.5% NSC with 10% fat and 18% fibre to support performance.
Senior Sport with Glucosamine (Tribute)
ExerciseExercise
FatFat
FiberFiber
SeniorSenior
Senior Sport with Glucosamine by Tribute is a textured feed for seniors with added glucosamine that intends to support joint health. It contains high fat and fibre to support calmer performances.
Senior Support Balancer (Dodson & Horrell)
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
SeniorSenior
VitaminsVitamins
Senior Support Balancer by Dodson & Horrell is a supplementary senior feed with an elevated protein level due to their decreased nutrient absorption, vitamins and minerals to support joint health, and biotin for additional hoof support. This feed also includes added herbs for antioxidant purposes.
Senior Textured (Woody’s Horse Nutrition)
Caloric EnergyCaloric Energy
FatFat
ProteinProtein
SeniorSenior
Woody’s Senior Textured is a complete textured feed formulated for senior horses. It contains 10% fat and is made with oats, beet pulp, molasses, and vegetable oil. The crude protein in this feed has added amino acids to help maintain muscle mass.
Senior Textured Feed (ProElite)
DigestionDigestion
Feed EfficiencyFeed Efficiency
PerformancePerformance
SeniorSenior
Pro Elite Senior Textured Feed is a high fat (10%) and protein (14%) senior complete feed. It is appropriate for senior horses that need help maintaining or gaining weight.
Seniority (Excel Equine Feeds)
FiberFiber
HealthHealth
NutritionNutrition
SeniorSenior
Seniority by Excel Equine Feeds is a textured feed intended to support the immune system, muscle and hoof quality of senior horses.
Seniority GC Plus (Tribute Equine)
Complete FeedComplete Feed
JointsJoints
RespiratoryRespiratory
SeniorSenior
Tribute Seniority™ GC Plus is a textured, complete feed for mature horses that contains additional ingredients to support joint health. It is formulated with glucosamine, chondroitin sulfate, and MSM.
Seniority Low NSC (Tribute)
Complete FeedComplete Feed
HealthHealth
Low NSC FeedsLow NSC Feeds
NutritionNutrition
Seniority Low NSC from Tribute is a complete feed containing 10% NSC (Starch + Sugar). This feed is intended for horses with sugar and starch sensitivities.
Seniority Pellet (Tribute)
Amino AcidAmino Acid
Complete FeedComplete Feed
PerformancePerformance
SeniorSenior
Seniority Pellet is a pelleted complete feed formulated for adult and senior horses. It is a low-calorie feed with a high feeding rate and can be used to replace forage in the diet.
Seniority™ Pellet (Tribute)
Complete FeedComplete Feed
HealthHealth
NutrientsNutrients
Ration BalancerRation Balancer
Tribute Seniority™ Pellet is an 18% NSC complete feed for mature horses. It provides energy from digestible fiber sources including dehulled soybean and alfalfa meal, wheat middlings, and beet pulp.
Sentinel Active Senior (Blue Seal)
ExerciseExercise
FatFat
FiberFiber
SeniorSenior
Blue Seal Sentinel Active Senior is a pelleted feed formulated for active senior horses or hard-keepers. With energy sources such as wheat middlings, soybean hulls, and soybean oil, Sentinel Active Senior contains 19.7% NSC.
Sentinel Care Carb-Guard (Blue Seal)
FiberFiber
Gut HealthGut Health
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Blue Seal Sentinel Care Carb-Guard is a pelleted feed formulated for adult horses with metabolic or digestive health concerns. It contains 10% NSC and is a high-fiber formula.
Sentinel Care Equine Choice Topline 30 (Blue Seal)
Easy KeeperEasy Keeper
ProteinProtein
Ration BalancerRation Balancer
ToplineTopline
Blue Seal Sentinel Care Equine Choice Topline 30 is a pelleted ration balancer with 14.7% NSC. It is formulated to provide protein, vitamins, and minerals that may be lacking in the equine diet.
Sentinel Care Omegatin (Blue Seal)
FatFat
PerformancePerformance
ProteinProtein
Ration BalancerRation Balancer
Sentinel Care Omegatin from Blue Seal is a high-fat supplement intended for horses requiring additional calories. It is a 15.7% NSC formula containing high fat ingredients such as rice bran and soybean oil.

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