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Ingredient

L-Lysine

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.

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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.
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.
Master’s Hoof Blend (Vita Flex)
Amino AcidAmino Acid
Hoof HealthHoof Health
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Master's Hoof Blend from Vita Flex is a hoof supplement containing the essential amino acids lysine and methionine, and biotin. It also contains sulfur and chelated trace minerals to support hoof growth and integrity.
Materna (Sollio Agriculture)
GrowthGrowth
HealthHealth
MareMare
NutritionNutrition
Materna is a pelleted feed intended for broodmares during lactation and gestation. This feed is intended to promote the development of the fetus. Materna contains 16% crude protein.
Materna TXT (Sollio Agriculture)
BroodmareBroodmare
EnergyEnergy
GrowthGrowth
HealthHealth
Materna TXT is a textured sweet feed intended for foals and lactating mares. This feed is intended to provide energy and protein to support milk production and foal growth.
Mature Horse (Bar Ale)
Complete FeedComplete Feed
JointsJoints
NutritionNutrition
SeniorSenior
Mature Horse is intended to support overall health and nutrient requirements for an adult to a senior horse. It contains glucosamine which is meant to support joint health.
Maverick 12-8 Horse Pellet (Big V Feeds)
BroodmareBroodmare
HealthHealth
NutritionNutrition
PerformancePerformance
Maverick 12-8 Horse Pellet by Big V Feeds is a pelleted feed intended for breeding stock, maintenance and performance horses.
Maverick 14-6 Horse Pellet (Big V Feeds)
Complete FeedComplete Feed
HealthHealth
NutrientsNutrients
NutritionNutrition
Maverick 14-6 Horse Pellet by Big V Feeds is a pelleted feed intended for all classes of horses.
Maverick Senior Horse Pellets (Big V Feeds)
Complete FeedComplete Feed
NutrientsNutrients
NutritionNutrition
SeniorSenior
Maverick Senior Horse Pellets by Big V Feeds is a pelleted feed formulated for senior horses.
Mega Dose (Horse Guard)
DigestionDigestion
Gut HealthGut Health
Mineral BalanceMineral Balance
VitaminsVitamins
Mega Dose by Horse Guard is a supplement that contains vitamins, minerals, and probiotics. It is intended to assist with digestion, gut health and hoof health.
Mega-Blud (Equistro)-[Discontinued]
HealthHealth
IngredientIngredient
PerformancePerformance
VitaminsVitamins
Mega-Blud from Equistro was a powdered booster dose of Vitamin A, E, and D. Mega-Blud was intended to support the function of the musculoskeletal, immune, and nervous systems.
Mega-Cell MVP – Pelleted Multi Vitamin and Mineral (Med-Vet)
HealthHealth
ProbioticProbiotic
Ration BalancerRation Balancer
VitaminsVitamins
MVP Mega-Cell is a pelleted vitamin and mineral supplement for horses formulated to balance grass hays and grain-based diets. It is also a source of amino acids and microbials.
Mega-Mag (Pellets) (MVP)
Amino AcidAmino Acid
Mineral BalanceMineral Balance
ProbioticProbiotic
VitaminsVitamins
Mega-Mag by MVP is a pelleted supplement designed for alfalfa hay/grain diets that provide vitamins, minerals, amino acids, and probiotics intended horses of all life stages.
Mellow Muscle (Sierra Gold)
CalmingCalming
Mineral BalanceMineral Balance
MuscleMuscle
VitaminsVitamins
Mellow Muscle by Sierra Gold is a powdered supplement for horses intended to aid horses suffering from PSSM. It contains vitamins, minerals, and amino acids which intend to support muscle growth.
Meta Safe (Hygain)
ImmunityImmunity
MetabolismMetabolism
Ration BalancerRation Balancer
Weight IssuesWeight Issues
Meta Safe from Hygain is a ration balancer pellet for horses. Meta Safe is intended for horses on a restricted diet or suffering from metabolic issues. This feed contains 6.5% NSC.
Metabolic Miracle (Aterak Nutrition)
Grain FreeGrain Free
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
VitaminsVitamins
Metabolic Miracle by Aterak Nutrition is a feed targeted toward horses or ponies with metabolic disorders (Cushing's, Founder, Laminitis). This feed contains the vitamins and minerals necessary to support a well-balanced diet and is high in fibre.
MetaBoost (Pureform)
Amino AcidAmino Acid
AntioxidantAntioxidant
ToplineTopline
VitaminsVitamins
MetaBoost from Pureform is a supplement for horses that contains antioxidants, vitamins, amino acids and minerals. It is meant to support digestion, muscles, and topline.
MFM Pellet (Kentucky Equine Research)
Amino AcidAmino Acid
HealthHealth
MuscleMuscle
RecoveryRecovery
MFM Pellet is a supplement that is made to assist with muscle recovery and repair and contains amino acids.
Microfeed (Dodson & Horrell)
Amino AcidAmino Acid
ExerciseExercise
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
Microfeed 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 yeast for good digestive function.
Milestone Compete Horse Food (Muenster)
Coat QualityCoat Quality
Competition HorsesCompetition Horses
FatFat
MuscleMuscle
Complete Horse Food is intended to promote muscle growth and function. It is ideal for performance horses and breeding stock as extra calories and energy are needed.
Milestone Foal Horse Food (Muenster)
FiberFiber
FoalFoal
GrowthGrowth
ProteinProtein
Foal Horse Food is intended for horses and ponies under the age of 1. The diet includes nutrients needed for normal growth and development.
Milestone Life Horse Food (Muenster)
Caloric EnergyCaloric Energy
FiberFiber
GrainsGrains
Hay StretcherHay Stretcher
Life Horse Food is designed to be a hay replacer and provide nutrients to horses and ponies of all ages. It is ideal for horses that are in moderate work.
Milestone Life Plus Horse Food (Muenster)
FatFat
FiberFiber
GrainsGrains
Omega 3-6-9Omega 3-6-9
Life Plus is a pelleted feed intended to provide additional energy and nutrients to all horses and ponies. It is also suitable for performance horse and breeding horses as they need extra essential nutrients.
Milestone Optimize Horse Supplement (Muenster)
FatFat
NutritionNutrition
Omega 3-6-9Omega 3-6-9
Weight IssuesWeight Issues
Optimize Horse Supplement is a high-fat feed intended to provide more energy to breeding horses and performance horses. It contains nutrient dense ingredients such as coconut meal and flaxseed.
Milestone Senior Horse Food (Muenster)
FatFat
FiberFiber
MareMare
SeniorSenior
Milestone Senior Horse Food is a pelleted feed intended for older horses in light to moderate work. It is suitable as a supplemental feed when forage availability is limited. It contains high fiber, low starch, alfalfa, coconut, flax, and algae meal.
Milk & Grow Pellets (Uckele)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Milk & Grow Pellets is a vitamin, mineral, probiotic, and amino acid pelleted supplement formulated for lactating and gestating mares as well as growing foals that have increased nutrient demands.
Mind, Body & Sole – Alfalfa (Equine Challenge)
DigestionDigestion
Omega 3-6-9Omega 3-6-9
Ration BalancerRation Balancer
Skin + HairSkin + Hair
Mind, Body & Sole - Alfalfa by Equine Challenge is a ration balancer intended to support overall health in horses on alfalfa diets.
Mind, Body & Sole – GRASS (Equine Challenge)
DigestionDigestion
Omega 3-6-9Omega 3-6-9
Ration BalancerRation Balancer
Skin + HairSkin + Hair
Mind, Body & Sole - GRASS by Equine Challenge is a ration balancer intended to support overall health in horses on grass diets.
Miniature Horse and Pony (Purina)
EnergyEnergy
Gut HealthGut Health
NutritionNutrition
ProteinProtein
Purina® Miniature Horse and Pony is a pelleted concentrate feed intended for all classes of miniature horses and ponies. These animals have different metabolic needs compared to other horses.
Moore Power 12-8 (Thomas Moore Feed)
FatFat
Mineral BalanceMineral Balance
NutritionNutrition
ProteinProtein
Moore Power 12-8 by Thomas Moore Feed is a pelleted feed that contains 12% protein and 8% fat. It is intended to balance the diet, assist with body conditioning, and contains vitamins and minerals.
Moore Power 14-10 (Thomas Moore Feed)
EnergyEnergy
GrowthGrowth
NutrientsNutrients
PerformancePerformance
Moore Power 14-10 from Thomas Moore Feed is a high energy feed that is intended for breeding, growing, or performance horses. It contains protein, fat, fiber, vitamins and minerals.
Moore Power Senior (Thomas Moore Feed)
Mineral BalanceMineral Balance
NutrientsNutrients
SeniorSenior
VitaminsVitamins
Moore Power Senior from Thomas Moore Feed is a feed meant for senior horses. It contains minerals, vitamins, fiber and protein. It is intended to assist with maintenance of senior horses.
MuesliMax (Hallway)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
EnergyEnergy
FatFat
MuesliMax from Hallway is a sweet feed fortified with Stamm 30 formulated for high-performance horses with high energy needs. This feed provides energy from oats, barley, vegetable oil, and black sunflower seeds. MuesliMax contains 11% protein, 8% fat, and 10% fibre.
Multi-Species Milk Replacer (Hubbard Feeds)
Bone HealthBone Health
FoalFoal
GrowthGrowth
NutritionNutrition
Hubbard® Life Multi-Species Milk Replacer supplies complete nutrition for foals, goat kids, lambs, calves and piglets. It is used to replace or supplement mother's milk with all-milk protein sources and high fat.
Muscle Builder (Summit Animal Health)
Competition HorsesCompetition Horses
MuscleMuscle
SeniorSenior
ToplineTopline
Muscle Builder by Summit Animal Health is a supplement intended to support muscle development. It contains amino acids, selenium, and vitamin E.
Muscle Builder Plus (Formula 707)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
MuscleMuscle
VitaminsVitamins
Muscle Builder Plus from Formula 707 is a pelleted supplement intended to support hoof support, muscle growth, and contains vitamins and minerals.
Muscle EQ (Uckele)
GrowthGrowth
MuscleMuscle
PerformancePerformance
RecoveryRecovery
Muscle EQ by Uckele is a powdered supplement that provides a blend of amino acids that intend to aid in muscle development, support, and strength. It contains ingredients such as acetyl l-carnitine HCL, l-leucine, and beta-alanine.
Muscle Pellets (Leg Up Equine)
Amino AcidAmino Acid
MuscleMuscle
NutritionNutrition
ToplineTopline
Muscle Pellets from Leg Up Equine is a pelleted supplement intended to support muscle development and recovery. Muscle Pellets are formulated with lysine, methionine and threonine intended to support muscle development.
Muscle-UP Max Performance (AniMed)
Amino AcidAmino Acid
HealthHealth
MuscleMuscle
PerformancePerformance
Muscle-UP Max Performance from AniMed is a supplement meant to help with proper muscle function and health. It can also help with a horse's overall health and physical condition.
Muscle+ (Advanced Equine Nutrition)
Bone HealthBone Health
MuscleMuscle
PerformancePerformance
ToplineTopline
Muscle+ by Advanced Equine Nutrition is intended to support muscle, bone health and gut health. It contains amino acids and magnesium oxide.
MuscleMx Pellets (Formula 707)
Amino AcidAmino Acid
HealthHealth
MetabolismMetabolism
MuscleMuscle
MuscleMx Pellets from Formula 707 is a supplement intended to support muscle growth. It contains lysine and aims to help with metabolic reactions.
Myo-Ease Plus (Doctor’s Choice Supplements)
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
VitaminsVitamins
Weight IssuesWeight Issues
Myo-Ease Plus is a supplement intended to support normal metabolic functions and help achieve weight gain. It is designed for horses with metabolic syndromes and insulin resistance.
Natur-Alfa Oat (Excel Equine Feeds)
EnergyEnergy
HealthHealth
NutrientsNutrients
NutritionNutrition
Natur-Alfa Oat from Excel Equine feeds is a cubed feed. Natur-Alfa Oat is an oat-alfalfa feed intended for a wide range of horse lifestyles.
Natur-Oat (Excel Equine Feeds)
Easy KeeperEasy Keeper
HealthHealth
NutrientsNutrients
NutritionNutrition
Natur-Oat from Excel Equine Feeds is a cubed feed. Natur-Oat is intended for horses in various life stages and is composed of ground oats.
Natural Blend Performance (Bluebonnet Feeds)
GrainsGrains
NutrientsNutrients
PerformancePerformance
ProbioticProbiotic
Natural Blend Performance from Bluebonnet Feeds is intended for horses at all life stages with added soybean as a source of fat. It contains 12% protein, 10% fat, and 15% fibre, with added probiotics and organic trace minerals.
Natural Digestive Support – BioEquine Supplement
DigestionDigestion
Mineral BalanceMineral Balance
ProbioticProbiotic
Toxin BinderToxin Binder
BioEquine Natural Digestive Support is an equine gut health supplement containing probiotics, toxin binders, Diatomaceous Earth, minerals, vitamins and amino acids.
Natural Senior (Thomas Moore Feed)
Complete FeedComplete Feed
NutrientsNutrients
SeniorSenior
YeastYeast
Natural Senior from Thomas Moore Feed is a complete feed for senior horses. It is intended to be highly soluble to assist senior horses and contains yeast and micronutrients.
Naturals Pelleted Horse Feed (Triple Crown)
Complete FeedComplete Feed
EnergyEnergy
NutritionNutrition
ProteinProtein
Triple Crown Naturals is a pelleted horse feed made with GMO-free ingredients and without corn, soybean, or molasses. Energy sources include alfalfa meal, ground oats, wheat middlings, and flaxseed.
No.14 Lo-Cal Balancer (Baileys Horse Feeds)
Easy KeeperEasy Keeper
Hoof HealthHoof Health
Metabolic SyndromeMetabolic Syndrome
Ration BalancerRation Balancer
No.14 Lo-Cal Balancer from Baileys Horse Feeds is intended for horses and ponies at rest or in light work or those who are laminitis prone. This feed contains 30mg/kg of Biotin, which is proven to support hoof health.
No.20 Slow Release Condition & Competition Mix (Baileys Horse Feeds)
Competition HorsesCompetition Horses
GrainsGrains
NutritionNutrition
Weight IssuesWeight Issues
No.20 Slow Release Condition & Competition Mix from Baileys Horse Feeds is intended for horses and ponies in heavy work to help them improve topline and condition. This feed contains 12% fiber and 10% fat which contributes to the slow release of calories.
Nu-Hoof Accelerator (Select the Best)
Amino AcidAmino Acid
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Nu-Hoof Accelerator from Select the Best is a hoof supplement that contains biotin, B-vitamins, zinc, copper, and the amino acids lysine and methionine.
Nu-Hoof Maximizer (Select The Best)
Amino AcidAmino Acid
Hoof HealthHoof Health
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Nu-Hoof Maximizer by Select The Best is a powdered supplement that provides nutrients important to hoof quality. These include biotin, methionine, copper and zinc.

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