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L-Glutamine - Feed Ingredient

L-Glutamine is a non-essential amino acid that plays a critical role in protein synthesis, gut health, and immune function in horses. It is the most abundant amino acid in muscle tissue and serves as an energy source for rapidly dividing cells, particularly those in the intestinal lining and immune system. While horses can naturally produce L-Glutamine in sufficient amounts under normal conditions, supplementation may be considered during periods of stress, illness, or intense exercise when demand increases.

L-Glutamine is particularly important for maintaining gut integrity and supporting the health of the intestinal mucosa. However, since the equine diet—especially forage and high-protein feeds—already provides significant amounts of glutamine, supplementation in gut health products must be at sufficiently high levels to be effective.

The following equine feeds, supplements and products contain L-Glutamine as an ingredient.

Feeds, Supplements & Products
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.
AFX (Equine Choice)
Gut HealthGut Health
HealthHealth
HindgutHindgut
UlcersUlcers
AFX by Equine Choice is a liquid gastric support supplement formulated to help maintain normal stomach pH. It contains calcium carbonate, L-glutamine, and magnesium oxide.
B.C.A.A Complex Powder (Peak Performance Nutrients)
Amino AcidAmino Acid
MuscleMuscle
PerformancePerformance
RecoveryRecovery
B.C.A.A Complex Powder is a branched-chain amino acid supplement for horses containing L-Valine, L-Leucine, and L-Isoleucine. This product supports muscle metabolism and is intended for performance horses.
Blitz! Pak (Peak Performance Nutrients)
ElectrolyteElectrolyte
HerbHerb
Mineral BalanceMineral Balance
VitaminsVitamins
Blitz! Pak by Peak Performance Nutrients is a vitamin and mineral supplement which is intended to be provided before a horse event. It contains electrolytes, amino acids, and a blend of herbs.
Blitz! Paste Original Formula (Peak Performance Nutrients)
ElectrolyteElectrolyte
PerformancePerformance
RecoveryRecovery
StaminaStamina
Blitz! Paste Original Formula is a vitamin and mineral supplement meant to be provided before a horse event. It contains electrolytes, amino acids, and a blend of herbs intended to aid performance during the event and recovery.
Calming Pro Complete (Formula 707)
CalmingCalming
DigestionDigestion
Gut HealthGut Health
StressStress
Calming Pro Complete from Formula 707 is a pelleted calming supplement. It is meant to support digestion, stomach health, and nervous system health.
Complete Plus HA (Basic Equine Nutrition)
Amino AcidAmino Acid
Hoof HealthHoof Health
JointsJoints
NutrientsNutrients
Complete Plus HA is an equine joint supplement that provides a combination of minerals, vitamins and nutraceuticals. It contains hyaluronic acid, MSM, glucosamine, biotin, amino acids and flax.
Constant Comfort Plus (Tribute)
Competition HorsesCompetition Horses
DigestionDigestion
HindgutHindgut
YeastYeast
Constant Comfort Plus from Tribute is a pelleted gut supplement for horses. Constant Comfort Plus is formulated with seaweed-derived calcium, aloe vera, glutamine and lecithin. This gut supplement is intended to help support the horse's digestive tract.
Cool Gut (DAC)
DigestionDigestion
Gut HealthGut Health
PrebioticPrebiotic
StressStress
Cool Gut by dac is a gastric health supplement intended to support horses in exercise and training.
Digest Ultra (Greenline)
Competition HorsesCompetition Horses
DigestionDigestion
Gut HealthGut Health
HealthHealth
Digest Ultra from Greenline is intended to help performance horses maintain normal digestive function. Digest Ultra is a powdered gut health supplement.
DJ (Platinum Performance)
JointsJoints
Mineral BalanceMineral Balance
ProbioticProbiotic
VitaminsVitamins
Platinum Performance® DJ by Platinum Performance is a powdered vitamin and mineral supplement intended to support joint and digestive health. It contains ingredients such as flaxseed, rice bran, clay, yeast, and a blend of vitamins and minerals.
Energex (Basic Equine Nutrition)
Amino AcidAmino Acid
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
ExerciseExercise
Energex is an electrolyte and energy supplement targeted to performance horses for use during and after exercise. It contains amino acids, antioxidants, electrolytes and dimethylglycine.
EQ BioClay + Paste – Maximum Strength (Full Bucket Equine)
ElectrolyteElectrolyte
Gut HealthGut Health
HealthHealth
ImmunityImmunity
EQ BioClay + Paste - Maximum Strength from Full Bucket Equine is a clay based formula that is intended to support digestive function during periods of stress. EQ BioClay + Paste - Maximum Strength contains probiotics, prebiotics, electrolytes and L-glutamine intended to support gastrointestinal function.
EQ Probiotic Granules – Regular Strength (Full Bucket Health)
Competition HorsesCompetition Horses
Gut HealthGut Health
ProbioticProbiotic
YeastYeast
EQ Probiotic Granules - Regular Strength from Full Bucket Health is a granule probiotic supplement for horses. EQ Probiotic Granules - Regular Strength is intended to support digestive and gut health. This supplement contains 25 billion CFU's of Saccharomyces Cerevisiae Boulardii.
EQ Probiotic Paste – Max Strength (Full Bucket Equine)
Gut HealthGut Health
HealthHealth
ProbioticProbiotic
YeastYeast
EQ Probiotic Paste - Max Strength from Full Bucket Equine is a yeast-based formula intended to support normal gut function in horses. EQ Probiotic Paste - Max Strength contains probiotics, prebiotics, and the amino acid L-glutamine.
EQ Probiotic Pellets – Extra Strength (Full Bucket Equine)
DigestionDigestion
Gut HealthGut Health
HealthHealth
ProbioticProbiotic
EQ Probiotic Pellets - Extra Strength from Full Bucket Equine is a pelleted probiotic pellet that is intended to support horses' gut health. This supplement contains 50 billion CFU's of Saccharomyces cerevisiae boulardii yeast strain.
EQ Probiotic Pellets – Regular Strength (Full Bucket Equine)
Gut HealthGut Health
HealthHealth
ImmunityImmunity
ProbioticProbiotic
EQ Probiotic Pellets - Regular Strength from Full Bucket Equine is a pelleted probiotic supplement. This supplement provides 50 billion CFUs intended to support digestive function in horses.
EquineSaver (Figuerola Laboratories)
HealthHealth
HerbHerb
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
EquineSaver by Figuerola Laboratories is a supplement that contains over 300 nutrients and is intended to support overall health in all horse types.
Equisel-Lyte (Omega Alpha)
Amino AcidAmino Acid
ElectrolyteElectrolyte
MuscleMuscle
RecoveryRecovery
Omega Alpha Equisel-Lyte is an electrolyte and Branched Chain Amino Acid (BCAA) supplement for horses. It is formulated to support exercise recovery and muscle growth.
Exceed 6-way (MVP)
Coat QualityCoat Quality
Gut HealthGut Health
Hoof HealthHoof Health
JointsJoints
Exceed 6-way from MVP is intended for joint, gastric, muscle, coat, hoof, and digestive health support. Some of the active ingredients include hyaluronic acid, MSM, biotin, zinc, copper, amino acids, probiotics, prebiotics, and a variety of herbs.
Exceed 6-Way Pellet (MVP)
JointsJoints
Mineral BalanceMineral Balance
MuscleMuscle
Omega 3-6-9Omega 3-6-9
Exceed 6-Way is a pelleted horse supplement containing MSM, glucosamine, hydrolyzed collagen, and yucca schidigera extract. It is formulated to support joints, hoof health, gut, and hair coat.
Excel (DePaolo Equine Concepts)
Gut HealthGut Health
HealthHealth
PrebioticPrebiotic
UlcersUlcers
Excel from DePaolo Equine Concepts is a supplement that aims to support and soothe the digestive tract in horses. It also can help with ulcers and the bacterial balance in the gut.
Foal Starter Paste (DAC)
FoalFoal
HealthHealth
PrebioticPrebiotic
ProbioticProbiotic
Foal Starter Paste by DAC is a gut- and joint-health supplement formulated to support the overall well-being of young foals. It contains a blend of prebiotics, probiotics, and amino acids designed to promote a healthy developing microbiome and encourage proper growth and development.
G.O. Big (Peak Performance Nutrients)
ExerciseExercise
GrowthGrowth
MuscleMuscle
RecoveryRecovery
G.O. Big by Peak Performance Nutrients is a muscle-building, strength, and recovery supplement. It contains a blend of amino acids to promote long-term, lean muscle mass on horses.
Galozyme Equine Sport (Technavet)
Competition HorsesCompetition Horses
DigestionDigestion
Gut HealthGut Health
VitaminsVitamins
Galozyme Equine Sport from Technavet is a supplement meant for horses in competition. It is intended to help with gut health and digestion through bacteria cultures.
Gastra-FX (Omega Alpha)
Gut HealthGut Health
HealthHealth
HindgutHindgut
ImmunityImmunity
Gastra-FX from Omega Alpha is a liquid gut supplement for horses. Gastra-FX contains licorice root, slippery elm bark, and ginger root intended to support normal stomach function.
Gastro pHix (Bluebonnet Feeds)
Bone HealthBone Health
Gut HealthGut Health
HealthHealth
HindgutHindgut
Gastro pHix from Bluebonnet Feeds is a pelleted supplement that is meant to support proper pH levels in the horse's stomach. It can also help with the health of the intestines and bones.
Gastro-Plex (Paste) (MVP)
Competition HorsesCompetition Horses
DigestionDigestion
Gut HealthGut Health
StressStress
Gastro-Plex by MVP is a paste supplement for horses that intends to help support healthy gut function. It contains a blend of probiotics and vitamins and is intended for feeding before and during competition.
Gastro-Plex Pellets (MVP)
ColicColic
DigestionDigestion
Gut HealthGut Health
YeastYeast
Gastro-Plex Pellets by MVP is a pelleted supplement that intends to aid digestive function. It contains antioxidants, probiotics and herbs that intend to help support stomach tissue lining and may ease discomfort.
GastroPRO Pellets (Horse Logic Pro) – [Discontinued]
DigestionDigestion
Gut HealthGut Health
HealthHealth
HerbHerb
GastroPRO Pellets from Horse Logic Pro is a pelleted gut supplement. GastroPRO Pellets are intended to aid in digestion. This supplement is formulated with a herb blend containing licorice root, grape seed extract, and marshmallow root.
GI (Platinum Performance)
DigestionDigestion
Gut HealthGut Health
ImmunityImmunity
PrebioticPrebiotic
Platinum Performance GI is a gut health supplement for mature horses. It is formulated with flax seed, probiotics, prebiotics, glutamine and other amino acids, toxin binders, vitamins and minerals.
GI Intensive Care (Bluebonnet Feeds)
DigestionDigestion
Gut HealthGut Health
HealthHealth
NutritionNutrition
GI Intensive Care by Bluebonnet Feeds is a powdered supplement intended to provide digestive support for horses undergoing stress, changes in diet, environment or schedule.
Grand Premium Plus (Grand Meadows)
Complete FeedComplete Feed
Hoof HealthHoof Health
JointsJoints
NutritionNutrition
Grand Premium Plus is a complete feed for horses that provides vitamins, minerals, and amino acids, as well as ingredients for joint support and digestion. Ideal for horses and ponies of all ages and work levels.
Gut Powder (Uckele)
DigestionDigestion
Gut HealthGut Health
HerbHerb
NutrientsNutrients
Uckele Gut Powder is designed as a digestion and gastrointestinal tract supplement containing marshmallow root, slippery elm bark, and aloe vera gel. It also contains yeast and probiotic cultures.
Healthy Gut Remedy (Horse Logic Pro)
Gut HealthGut Health
HealthHealth
ImmunityImmunity
YeastYeast
Healthy Gut Remedy from Horse Logic Pro is a pelleted gut supplement for horses. Healthy Gut Remedy is intended to provide hind gut support.
Horse XL (Equinety)
Amino AcidAmino Acid
MuscleMuscle
ProteinProtein
RecoveryRecovery
Equinety Horse XL is a pure amino acid supplement formulated to support muscle strength and recovery. This supplement also supports collagen in the horse, which leads to a healthier coat and bones. It contains a blend of 8 amino acids.
Imm-Pede for Foals (AniMed)
DigestionDigestion
FoalFoal
ProbioticProbiotic
YeastYeast
Imm-Pede for Foals from AniMed is a supplement meant to support digestive health in foals. It contains probiotics, yeast, and is in a paste form.
InsulinWise (Wiser Concepts)
HealthHealth
ImmunityImmunity
Metabolic SyndromeMetabolic Syndrome
RecoveryRecovery
InsulinWise from Wiser Concepts is an equine supplement only available through a licensed veterinarian. InsulinWise is intended to maintain healthy insulin levels and normal metabolic function.
Jeremiah’s Ulcer Repulser (JUR Equine)
ColicColic
HerbHerb
HindgutHindgut
UlcersUlcers
Jeremiah's Ulcer Repulser is an herbal supplement for horses with gastric ulcers and colic. It contains slippery elm bark, marshmallow root, fenugreek seed, carrot powder, probiotics, and L-glutamine.
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.
Mega-FLX + HA (Spectra)
ExerciseExercise
JointsJoints
MuscleMuscle
RecoveryRecovery
Mega-FLX + HA is an equine supplement intended for targeting joint and muscle health. This liquid formulation contains vitamins, and minerals as well as MSM and hyaluronic acid.
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.
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.
Muscle Recharge (Bluebonnet Feeds)
CirculationCirculation
EnergyEnergy
ImmunityImmunity
MuscleMuscle
Muscle Recharge by Bluebonnet Feeds is a powdered supplement intended to support muscle stamina and function in performance horses.
Muscle-Aid (Multivet USA Inc)
Amino AcidAmino Acid
ExerciseExercise
MuscleMuscle
RecoveryRecovery
Muscle-Aid by Multivet USA Inc is a supplement intended to aid with the strength and repair of muscles in horses.
OCD Pellets (Doc’s Products)
Bone HealthBone Health
GrowthGrowth
HealthHealth
JointsJoints
OCD Pellets by Doc's Products is a bone and joint supplement intended for horses. It supplies 900 mg of silicon and 50 mg of hyaluronic acid in each 28 g serving.
Original Performance Formula (Wilson Feeds)
HealthHealth
NutritionNutrition
PerformancePerformance
Ration BalancerRation Balancer
Original Performance Formula by Wilson Feeds is a soy-free supplement intended to fill nutritional gaps of horses on a forage-based diet.
Pectigus ADVANCED (Hestevard)
Competition HorsesCompetition Horses
DigestionDigestion
Gut HealthGut Health
RecoveryRecovery
Pectigus ADVANCED by Hestevard is a pelleted supplement intended to support gut function and health in horses requiring regular maintenance, and horses during intense training, competition, or recovery.
Performance & Recovery Pellets (Equine America)
AntioxidantAntioxidant
JointsJoints
MuscleMuscle
RecoveryRecovery
Performance and Recovery Pellets from Equine America is a supplement intended to assist with joint and muscle health and recovery. It is meant to reduce inflammation associated with training and contains antioxidants.
Performance One (Pureform)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
ExerciseExercise
PerformancePerformance
Performance One is a concentrated supplement for performance horses providing glucosamine, MSM, creatine, amino acids, vitamins, trace minerals and electrolytes.
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.

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