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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.
Sentinel LifeTime (Blue Seal)
FatFat
FiberFiber
JointsJoints
PerformancePerformance
Sentinel LifeTime is an extruded feed intended for junior, adult and senior horses that require a higher caloric density. It provides 10% fat, 20% fibre and a maximum NSC of 14.5%.
Sentinel Performance LS (Blue Seal)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
PerformancePerformance
SeniorSenior
Blue Seal Sentinel® Performance LS is an extruded feed providing a maximum of 14% NSC. It is intended for horses requiring a higher calorie diet, such as equine athletes and hard keepers.
Sentinel Safe Start SS (Blue Seal)
Complete FeedComplete Feed
FoalFoal
GrowthGrowth
LactationLactation
Sentinel Safe Start SS is an extruded complete feed formulated for broodmares and growing foals. It provides higher protein content (16%) to meet the increased demands of late gestation, early lactation, and developing foals.
Sentinel Senior SR (Blue Seal)
DentalDental
Feed EfficiencyFeed Efficiency
Ration BalancerRation Balancer
SeniorSenior
Sentinel Senior SR is an extruded feed for older horses and mature easy keepers. It is formulated to provide higher feed efficiency for senior horses with gut issues or poor teeth. The addition of bioavailable marine-sourced calcium supports gastric pH and health.
Sentinel Simply Lite (Blue Seal)
Easy KeeperEasy Keeper
Gut HealthGut Health
Metabolic SyndromeMetabolic Syndrome
ProbioticProbiotic
Sentinel Simply Lite from Blue Seal is a low-calorie pelleted feed intended for adult horses. Formulated for easy keepers, Sentinel Simply Lite provides lower fat and protein content with 16.2% NSC.
Sentinel XT Grow (Blue Seal)
FiberFiber
FoalFoal
GrowthGrowth
LactationLactation
Sentinel® XT™ Grow is a textured horse feed intended for growing foals and lactating mares. It provides 10% fat and 16% protein with primary ingredients including soybean hulls, beet pulp and alfalfa meal.
Sentinel XT Pro (Blue Seal)
GrowthGrowth
NutrientsNutrients
PerformancePerformance
SeniorSenior
Sentinel XT Pro by Blue Seal is a textured feed intended for growing horses, performance horses, gestating mares, breeding horses and senior horses.
Sentinel XT Show (Blue Seal)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
ExerciseExercise
Weight IssuesWeight Issues
Sentinel® XT™ Show is a textured feed intended for active adult horses and competition horses with higher nutrient requirements. It provides a higher fat content (12%) and digestible fibre sources including soybean hulls, beet pulp and alfalfa meal.
Sho-Hoof (Manna Pro)
Amino AcidAmino Acid
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Sho-Hoof by Manna Pro is an equine hoof supplement that contains biotin, copper, zinc, and amino acids. It is intended to promote healthy hooves, skin, and coat through the inclusion of omega-3 fatty acids.
Show Formula (Seminole)
Competition HorsesCompetition Horses
ExerciseExercise
FatFat
PerformancePerformance
Seminole Show Formula is a textured feed for adult show and competition horses because of it's high calorie and energy density. Show Formula contains yeast cultures, chelated minerals, and antioxidants.
Show Time (Capstone Horse Feed)
HealthHealth
NutrientsNutrients
NutritionNutrition
SeniorSenior
Show Time by Capstone Horse Feed is a low energy, maize-free feed intended for mature and leisure horses.
Showman (ProElite)
Complete FeedComplete Feed
Low NSC FeedsLow NSC Feeds
MuscleMuscle
PerformancePerformance
ProElite by Showman is a pelleted, extruded feed intended for mature horses in moderate to intense work. It is intended to be a low glycemic feed for supporting muscle strength.
Showtorque (Hygain)
Complete FeedComplete Feed
FatFat
MuscleMuscle
ProteinProtein
Showtorque by Hygain is a high-protein and fat pelleted feed designed for performance horses. It contains 20% protein, 9% fat, and 16% fibre with added yeast for improved digestion.
Signature Elite (Banks Mill Feeds)
Mineral BalanceMineral Balance
MuscleMuscle
PerformancePerformance
VitaminsVitamins
Banks Signature Elite is a beet pulp-based textured feed that provides high fat and fibre with probiotics. It is intended for mature horses in work.
Signature Prime (Banks Mill Feeds)
Mineral BalanceMineral Balance
NutrientsNutrients
SeniorSenior
VitaminsVitamins
Banks Signature Prime is a high-fat beet pulp-based textured feed with no corn. It is intended for senior horses as well as mature horses that need to gain weight.
Sixteen Plus Mix (Dodson & Horrell)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
MuscleMuscle
SeniorSenior
Sixteen Plus Mix by Dodson & Horrell is a textured senior horse feed with higher protein levels and added vitamins and minerals for joint health and optimal absorption. This feed is also highly palatable with molasses, ricebran, and rapeseed oil ingredients.
Sleek (Banks Mill Feeds)
FatFat
FiberFiber
MuscleMuscle
PerformancePerformance
Sleek by Banks Feed Mill is a high-fat, beet pulp-based feed with low (7%) starch content. It contains 13% fat from flax, rice bran, and soybean oil.
Smartamine L (Adisseo)
Amino AcidAmino Acid
GrowthGrowth
ImmunityImmunity
ToplineTopline
Smartamine L is a source of the amino acid lysine. Lysine is often considered the first limiting amino acid in equine diets. Supplementation may be beneficial for horses experiencing muscle loss or poor topline.
Smartamine ML (Adisseo)
Amino AcidAmino Acid
GrowthGrowth
IngredientIngredient
ProteinProtein
Smartamine ML is a source of the amino acids methionine and lysine. Methionine and lysine are two of the limiting amino acid in equine diets. Supplementation may support topline and muscle growth.
SmartCombo Senior Ultra (SmartPak)
Gut HealthGut Health
Hoof HealthHoof Health
JointsJoints
SeniorSenior
SmartCombo Senior Ultra is a pelleted supplement intended for senior horses containing glucosamine, chondroitin sulfate, hyaluronic acid, MSM, biotin, omega 3 fatty acids, probiotics, prebiotics, and digestive enzymes.
SmartCombo Ultra Pellets (SmartPak)
Coat QualityCoat Quality
Hoof HealthHoof Health
JointsJoints
YeastYeast
This supplement made for horses by SmartPak is meant to support the health of hooves, joints, coat, and digestion. It is pelleted and contains yeast.
SmartFlex Rehab Pellets (SmartPak)
ExerciseExercise
JointsJoints
ProteinProtein
RecoveryRecovery
SmartFlex Rehab Pellets is a supplement intended for horses rehabilitating from an injury. It contains glucosamine, chondroitin sulfate, and hyaluronic acid for joints and connective tissue.
SmartGain (SmartPak)
DigestionDigestion
IngredientIngredient
NutritionNutrition
YeastYeast
SmartGain from SmartPak is a powdered weight gain equine supplement. SmartGain is formulated with rice bran and coconut meal. This supplement includes added lysine, methionine and threonine intended to support healthy body condition.
SmartHoof® Pellets (SmartPak)
Amino AcidAmino Acid
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
SmartHoof® Pellets by SmartPak is a pelleted hoof supplement containing 25 mg of biotin and methionine, lysine, threonine, and gelatin. This supplement provides the necessary nutrient to grow strong, resilient hooves.
SmartMuscle Mass (SmartPak)
Amino AcidAmino Acid
Competition HorsesCompetition Horses
MuscleMuscle
PerformancePerformance
SmartMuscle® Mass Pellets is an amino acid supplement for horses, containing branched chain amino acids (BCAAs) and whey protein. It is formulated to support muscle development.
SmartPituitary Senior Pellets (SmartPak)
HealthHealth
ImmunityImmunity
Metabolic SyndromeMetabolic Syndrome
SeniorSenior
SmartPituitary Senior Pellets from SmartPak is a pelleted equine supplement intended for aged horses with pituitary issues. This supplement is formulated with chasteberry, Vitamin E, Siberian ginseng, and echinacea intended to support immune function in senior horses.
Solution 10-10-10 (Tucker Milling)
EnergyEnergy
GrainsGrains
NutrientsNutrients
PerformancePerformance
Solution 10-10-10 by Tucker Milling is a textured feed specially formulated for mature performance horses. With 10% protein, 10% fat, and 10% fiber, it delivers a balanced nutritional profile that meets energy demands while keeping protein levels moderate.
Solution-12 (Tucker Milling)
Complete FeedComplete Feed
DigestionDigestion
FiberFiber
SeniorSenior
Solution 12 by Tucker Milling is a pelleted feed formulated for senior horses and is intended to be fed alongside forage. It includes lactic acid bacteria and yeast to support digestive health, though the specific inclusion levels are not disclosed.
Solutions 10 Pellet (Right Choice)
Amino AcidAmino Acid
Complete FeedComplete Feed
FatFat
NutritionNutrition
Solutions 10 is a 10% protein and 6% fat pelleted complete feed. This feed is formulated for horses in work and at maintenance. It contains both organic and inorganic sources of minerals, yeast, and added amino acids.
Solutions 10 Textured (Right Choice)
Complete FeedComplete Feed
FatFat
Gut HealthGut Health
NutritionNutrition
Solutions 10 Textured by Right Choice is a textured complete feed containing 10% protein, 10% fat, and 26.5% NSC. It is formulated for horses in work and maintenance.
Solutions 12 Pellet (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 12 by Right Choice is a textured complete feed intended for horses at work and maintenance. It contains 12% protein and 8% fat with added yeast and amino acids.
Solutions 12 Textured (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 12 Textured is a complete feed with 12% protein and 6% fat. It is formulated using corn, oats, barley, and wheat as energy sources. It also contains soybean as a protein source and soybean oil as a fat source.
Solutions 14 Cube (Right Choice)
Complete FeedComplete Feed
FiberFiber
NutritionNutrition
ProteinProtein
Right Choice Solutions® 14 Cube is a cubed feed with 14% protein intended for horses in work and at maintenance. It provides protein from alfalfa meal and extruded soybeans.
Solutions 14 Low Starch Pellet (Right Choice)
Complete FeedComplete Feed
FiberFiber
Low NSC FeedsLow NSC Feeds
NutritionNutrition
Solutions 14 Low Starch is a pelleted complete feed that contains 14% protein and 7% fat. It is formulated for working and maintenance horses and is marketed as a low NSC feed.
Solutions 14 Pellet (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 14 Pellet is a complete feed with 14% protein and 6% fat intended for horses at maintenance or in work. It utilizes alfalfa meal and extruded soybeans for protein.
Solutions 14 Textured (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 14 Textured is a complete feed containing 14% protein from soybean and alfalfa meal and 6% fat from soybean oil. It contains whole oats, cracked corn, wheat middling's, and molasses as energy sources.
Spectrum Choice 14% Horse – Pellet (Spectrum Feed Services)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
NutritionNutrition
Weight IssuesWeight Issues
Spectrum Choice 14% is a pelleted feed containing 14% crude protein and ~55% NSC. It is a low-fat, low-fiber product with a low feeding rate. This feed is intended for adult horses from light to heavy work.
SpeedFeed (Dunstan)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
SpeedFeed by Dunstan is a complete textured feed intended to meet the nutrient requirements of racehorses and performance horses. It is formulated using a highly palatable blend of cereals including Oats, Maise, Barley, Lupins, Sugarbeet, Sunflower Seeds, Vegitable Oils and a Vitamin and Mineral premix.
Sport 14 (Banks Mill Feeds)
BroodmareBroodmare
Caloric EnergyCaloric Energy
FatFat
ProteinProtein
Banks' Sport 14 is a high-protein, high-fat textured feed intended for breeding and performance horses. It contains 16.6% NSC with energy sources including wheat middlings, oats, soybean oil, beet pulp, alfalfa meal, and cane molasses.
Sport Horse Grass (Uckele)
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
Sport Horse Grass is a pelleted vitamin, mineral, and amino acid supplement intended for performance horses consuming a grass-based diet. This supplement is intended to support muscular function, joint/tendon maintenance, and recovery.
Stability (Excel Equine Feeds)
Easy KeeperEasy Keeper
HealthHealth
NutrientsNutrients
NutritionNutrition
Stability is a pelleted feed from Excel Equine Feeds. This feed is intended for horses in any level of work, and stage of life.
Stable MAX Performance (Elk Grove Milling)
Complete FeedComplete Feed
MareMare
PerformancePerformance
StallionStallion
Stable MAX Performance is a complete feed from Elk Grove Milling intended for performance horses, stallions, and broodmares. It provides probiotics and 14% protein.
Stable MAX Ultra Mate (Elk Grove Milling)
Complete FeedComplete Feed
Easy KeeperEasy Keeper
ProbioticProbiotic
ProteinProtein
Stable MAX Ultra Mate is a complete feed from Elk Grove Milling intended for easy keepers or horses in light work. It provides probiotics and 30% protein.
Stake Horse (Woody’s Horse Nutrition)
Competition HorsesCompetition Horses
DigestionDigestion
FiberFiber
PerformancePerformance
Stake Horse by Woody’s Horse Nutrition is a beet-based 9% fat and 13% protein feed intended for racehorses. It is made with molasses, oats, barley, and beet pulp. This horse is intended for racehorses or performance horses.
Stallion Max (Hallway)
Caloric EnergyCaloric Energy
NutritionNutrition
Omega 3-6-9Omega 3-6-9
StallionStallion
Stallion Max from Hallway is a fortified high-fat, high-fibre feed formulated for stallions. This feed has added omega-3 fatty acids. Stallion Max contains 14% protein, 6% fat, and 12% fibre. It is recommended to start feeding 'Stallion Diets' 60 to 90 days before breeding season begins.
Stallion Mix (Dunstan)
Complete FeedComplete Feed
EnergyEnergy
NutrientsNutrients
StallionStallion
Stallion Mix by Dunstan is a complete feed formulated to meet the nutrient and energy demands of a stallion during breeding season. It contains extruded cereal grains, vegetable oils, minerals and vitamins.
Starch Wise (ProElite)
Gut HealthGut Health
NutritionNutrition
PerformancePerformance
SeniorSenior
ProElite Starch Wise is a pelleted horse feed with a maximum 14.5% NSC. It is formulated with moderate levels of starch and sugar for mature show and performance horses.
Steady Energy Formula (Bartlett Milling) [Discontinued]
EnergyEnergy
FatFat
Grain FreeGrain Free
PerformancePerformance
Bartlett Steady Energy Formula is a pelleted feed intended for mature horses that require lower levels of energy in their diet. It provides 12% protein and 6% fat.
Step 1 Start Right (Trouw Nutrition)
Complete FeedComplete Feed
FoalFoal
GrowthGrowth
LactationLactation
Step 1 Start Right is an extruded feed formulated to meet the nutritional demands of lactating broodmares, foals and weanlings. It can be fed to growing horses up to one year of age.
Step 2 Peak Performance – Sport (Trouw Nutrition)
Complete FeedComplete Feed
FatFat
PerformancePerformance
Weight IssuesWeight Issues
Step 2 Peak Performance - Sport by Trouw is an extruded, high-fat feed formulated to meet the energy demands of horses in heavy work, stallions, growing horses, and hard keepers. It provides 14% protein and 10% fat from vegetable oils.

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