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Thiamine (Vitamin B1) - Feed Ingredient

Thiamine, also known as Vitamin B1, is a water-soluble vitamin essential for carbohydrate metabolism, nervous system function, and energy production in horses. It plays a critical role in the conversion of glucose into ATP, the primary energy source for cells, by acting as a coenzyme in the Krebs cycle. Thiamine is also necessary for the proper functioning of the nervous system, as it helps regulate neurotransmitter activity and nerve impulse transmission.

Horses naturally produce some thiamine through microbial fermentation in the hindgut, and additional dietary sources include cereal grains, wheat bran, and brewer’s yeast. Deficiency is rare but can occur due to prolonged antibiotic use, excessive grain consumption, or ingestion of plants containing thiaminase enzymes (such as bracken fern and horsetail), which degrade thiamine. Symptoms of deficiency may include weight loss, muscle tremors, incoordination, and nervous system disturbances. In such cases, thiamine supplementation in the form of thiamine hydrochloride or thiamine mononitrate may be beneficial. As a water-soluble vitamin, excess thiamine is excreted in urine, making toxicity unlikely, though balanced supplementation is advised for optimal health.

The following equine feeds, supplements and products contain Thiamine (Vitamin B1) 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.
B-Vitamin Pak (Mad Barn)
CalmingCalming
ExerciseExercise
StressStress
VitaminsVitamins
B-Vitamin Pak is a comprehensive B-vitamin supplement in powder form. It provides a balanced profile of the B-Complex vitamins and may be beneficial for horses during times of heavy work, stress, or illness.
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.
TNT For Horses (Dynamite Equine)
HealthHealth
ImmunityImmunity
NutritionNutrition
VitaminsVitamins
TNT For Horses from Dynamite Equine is a pelleted equine supplement. TNT For Horses is intended to support overall equine health. This supplement contains 18% protein and 8% fat.
Top Breeder (McCauley’s Equine Formulas)
Coat QualityCoat Quality
ExerciseExercise
FatFat
FoalFoal
Top Breeder is a pelleted horse feed containing high levels of beet pulp and vegetable oil. It is formulated to improve body condition in breeding and performance horses.
Top Ten (McCauley’s Equine Formulas)
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Weight IssuesWeight Issues
Top Ten™ is a highly palatable textured feed formulated for performance horses to help support body condition. It contains high amounts of vegetable oil, antioxidants such as vitamin E, and beet pulp.
Topline Advantage (ProElite)
DigestionDigestion
NutritionNutrition
ProteinProtein
ToplineTopline
ProElite Topline Advantage is a pelleted horse supplement that provides essential nutrients and amino acids for muscle development. It contains 50% crude protein.
Total Blood Fluids Muscle (Ramard)
Blood CellsBlood Cells
ElectrolyteElectrolyte
MuscleMuscle
PerformancePerformance
This supplement from Ramard is meant to assist in muscle recovery, health, and strength. It also provides energy and increases the amount of red blood cells in horses, while also providing electrolytes. This aids in performance, exercise, and health.
Total Calm & Focus (Ramard)
CalmingCalming
NutrientsNutrients
PerformancePerformance
StaminaStamina
Total Calm & Focus is a powdered supplement that aims to calm nerves or anxiety without drowsiness. Its natural formula is meant to support focus as well as help with performance, endurance, and stamina.
Total Calm & Focus Syringe (Ramard)
CalmingCalming
PerformancePerformance
StaminaStamina
StressStress
Total Calm & Focus is a syringe version of Ramard's supplement that is meant to calm anxious or stressed horses. It aims to relax horses without drowsiness and may assist in performance and stamina.
Total Control (Finish Line)
ElectrolyteElectrolyte
Gut HealthGut Health
PerformancePerformance
VitaminsVitamins
Total Control by Finish Line is a horse supplement containing ingredients to support gut health, joints, hooves, coat quality and red blood cells. It provide electrolytes as well as vitamins and minerals.
Total Equine (Total Feeds)
Complete FeedComplete Feed
FiberFiber
Gut HealthGut Health
ProteinProtein
Total Equine is a feed formulated for horses, mules, and donkeys. It contains 15% crude protein and 5% fat from alfalfa meal, rice bran, wheat middlings, and soybean meal.
Total Equine Essentials (Total Feeds)
CirculationCirculation
Low NSC FeedsLow NSC Feeds
Mineral BalanceMineral Balance
VitaminsVitamins
Total Equine Essentials is a complete extruded ration balancer intended for horses of all classes and activity levels. It has a low feeding rate and is designed to help to keep the NSC content of the diet low.
Total Equine LNSC (Total Feeds)
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
NutrientsNutrients
Ration BalancerRation Balancer
Total Equine LNSC is a complete ration intended for horses with insulin resistance. It contains 15% crude protein and 5% fat.
Total Lactic Care (Ramard)
Amino AcidAmino Acid
ExerciseExercise
MuscleMuscle
PerformancePerformance
Total Lactic Care from Ramard is a supplement that is meant to help muscles after performance. It can help with muscle fatigue, cramping, and tying up. It contains vitamins, minerals, and amino acids.
Total Nutrition (PharmaSolute)
JointsJoints
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
PharmaSolute Total Nutrition is a powdered supplement for horses and ponies. It contains vitamins, minerals, and ingredients to support joint health.
Total Performance (DAC)
HealthHealth
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Total Performance by DAC is a vitamin and mineral supplement designed for mature performance horses. It is formulated with trace minerals, amino acids and probiotics.
Total Performance Plus (DAC)
HealthHealth
JointsJoints
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Total Performance Plus by DAC is a powered joint supplement enriched with vitamins and minerals. It contains glucosamine, chondroitin sulfate, and sodium hyaluronate.
Total Plus Original (Arnall’s Naturals)
HealthHealth
ImmunityImmunity
NutritionNutrition
PerformancePerformance
Total Plus from Arnall's Naturals is a powdered 'all-in-one' supplement. This supplement is intended to support overall equine health and well-being.
Total Supplement (Total Supplements)
ImmunityImmunity
Mineral BalanceMineral Balance
RecoveryRecovery
VitaminsVitamins
Total Supplement is a horse supplement that contains vitamins, minerals, amino acids, and probiotics. It can assist with joint support, immunity and muscle recovery.
Tough as Nails (Tribute)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Tribute Tough As Nails is a pelleted horse supplement formulated to support hoof growth. It contains biotin, calcium, iodine, organic minerals and the amino acid methionine.
Tough To Beet® (Tribute Equine)
EnergyEnergy
FatFat
FiberFiber
PerformancePerformance
Tough To Beet® is a high-fat textured feed formulated with shredded beet pulp, grains and soybean oil. This feed targets mature horses in training to meet their calorie needs.
Track Burner (Quality Feeds)
Competition HorsesCompetition Horses
EnergyEnergy
NutrientsNutrients
PerformancePerformance
Track Burner by Quality feeds is a textured sweet feed containing vitamins and minerals. It is intended to meet the high energy demands of racehorses.
Tracktorque (Hygain)
DigestionDigestion
EnergyEnergy
Gut HealthGut Health
Skin + HairSkin + Hair
Tracktorque by Hygain is a high-energy feed meant for high performance horses including racing, training, and intense competition. It contains vitamins, minerals, prebiotics, probiotics and is intended to assist with gut health, digestion, coat health, muscle and heart health.
Tradition 12 (Hallway)
BroodmareBroodmare
Complete FeedComplete Feed
Competition HorsesCompetition Horses
NutritionNutrition
Tradition 12 from Hallway is a fortified feed cube formulated for broodmares, stallions, and performance horses. This feed contains 12% protein, 4% fat, and 9% fibre
Trail Mate Sweet Formula (Bartlett Milling) [Discontinued]
Competition HorsesCompetition Horses
EnergyEnergy
ExerciseExercise
FlavorFlavor
Trail Mate Sweet Formula is a grain-based feed intended for western, pleasure and trail horses in moderate to rigorous work. It contains 13% protein, 4% fat and 11% fibre from sources such as wheat middlings, corn, oats and barley.
Trail Mix (Running Horse Elite Equine Nutrition)
Complete FeedComplete Feed
FiberFiber
HealthHealth
Mineral BalanceMineral Balance
Running Horse Trail Mix is a concentrated feed containing high fiber, vitamins, minerals, and 12% protein. This feed targets adult horses that are inactive or performing light work.
Trail Time (McCauley’s Equine Formulas)
Complete FeedComplete Feed
Feed EfficiencyFeed Efficiency
Gut HealthGut Health
HealthHealth
Trail Time® is an oat-based textured feed targeted at adult horses at maintenance or in light work. It provides a lower energy density and fat content than other McCauley feeds.
Training Formula (Triple Crown) – [Discontinued]
EnergyEnergy
ExerciseExercise
FatFat
PerformancePerformance
Triple Crown Training Formula is now a discontinued feed which was a high-calorie, high-fat feed designed to meet the energy requirements of exercising horses. Energy sources included oats, molasses, soybeans, beet pulp, alfalfa and wheat middlings.
Tribute Ultra (Tribute)
ExerciseExercise
FatFat
NutrientsNutrients
Weight IssuesWeight Issues
Tribute Ultra is intended for hard keepers and horses and ponies in heavy work. This feed is meant to support weight gain and performance with its 12% fat and 12% protein formula.
Trifecta (Buckeye) – [Discontinued]
Complete FeedComplete Feed
FlavorFlavor
NutritionNutrition
PerformancePerformance
Buckeye TRIFECTA™ Sweet Pelleted Feed is a palatable and calorie-dense feed containing cane molasses to increase intake. TRIFECTA™ is intended for performance horses with higher energy demands.
Trifecta (Horse Guard)
HealthHealth
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Trifecta from Horse Guard is a powdered vitamin, mineral, hoof, and joint supplement with added prebiotics and probiotics. It contains glucosamine, MSM, and hyaluronic acid to help with joint support. Trifecta also contains added iron and 32 mg of biotin per serving.
Trifiber Compete (Excel Equine Feeds)
Caloric EnergyCaloric Energy
Low NSC FeedsLow NSC Feeds
PerformancePerformance
Weight IssuesWeight Issues
Trifiber Compete from Excel Equine Feeds is meant for performance horses and has a low NSC content. It is a safe source of calories with fat and fiber. It is made to be beneficial to horses prone to metabolic conditions and horses with weight issues.
Triformance (McCauley’s Equine Formulas)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Triformance® is a textured feed targeted to performance horses, including racehorses and eventers. It has high energy and fat content and provides higher levels of antioxidant nutrients such as Vitamin E.
Triple Play (Equi-lete)
Gut HealthGut Health
HealthHealth
PerformancePerformance
Weight IssuesWeight Issues
Triple Play by Equi-lete is a vitamin and mineral supplement intended to support gastric health, performance and body condition in hard keepers, performance horses and breeding stock.
Triplify (Excel Equine Feeds)
Competition HorsesCompetition Horses
HealthHealth
NutritionNutrition
PerformancePerformance
Triplify is a textured feed from Excel Equine Feeds. Triplify is intended for horses in moderate to heavy work, and contains 10% protein and 10% fat.
Triumph 12-8 Horse Feed (Nutrena)
MareMare
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Triumph 12-8 Horse Feed by Nutrena is a feed that is intended for mares, breeding horses, maintenance, and performance horses. It has 12% protein, 12% fiber, and 8% fat.
Triumph Active 12 Pellet (Nutrena)
HealthHealth
MuscleMuscle
NutritionNutrition
RecoveryRecovery
Nutrena Triumph® Active 12 Pellet is an 18% NSC feed intended for active mature horses. It contains added methionine and lysine which are meant to support muscle development.
Triumph Complete (Nutrena)
Complete FeedComplete Feed
EnergyEnergy
NutritionNutrition
ProteinProtein
Triumph Complete is a high-fibre, moderate protein and low-fat complete feed formulated with 22% NSC. It is formulated as a hay stretcher that can be used to replace portions of forage.
Triumph Fiber Plus (Nutrena)
DigestionDigestion
EnergyEnergy
FiberFiber
NutritionNutrition
Triumph Fiber Plus is a high fat and fibre complete feed providing 12% protein, 10% fat and 17% NSC. Triumph Fiber Plus is formulated for mature horses of all exercise levels.
Triumph Professional (Nutrena)
Complete FeedComplete Feed
EnergyEnergy
NutritionNutrition
ProteinProtein
Triumph Professional is a pelleted complete feed formulated for a variety of life stages. It provides 14% protein, 8% fat and 17% NSC.
Triumph Professional Pellet Horse Feed (Nutrena)
Complete FeedComplete Feed
FiberFiber
MuscleMuscle
NutritionNutrition
Triumph Professional is a pelleted complete feed that provides 14% protein, 8% fat and less than 17% NSC. It is formulated for a large variety of horses such as broodmares, foals, performance horses, and horses at maintenance.
Triumph Professional Textured 14% Horse Feed (Nutrena)
DigestionDigestion
HealthHealth
Hoof HealthHoof Health
ToplineTopline
Triumph Professional Textured Horse Feed is a concentrate feed for horses of all ages and work levels. It supplies 14% crude protein, 8% crude fat, and 33% sugar and starch.
Triumph Senior Horse Feed (Nutrena)
Complete FeedComplete Feed
Gut HealthGut Health
SeniorSenior
ToplineTopline
Triumph® Senior Horse Feed is a complete feed intended for older horses providing 14% protein, 7% fat and 21% NSC (sugar and starch).
Trouble Free Powder (Kentucky Performance Products)
CalmingCalming
HealthHealth
PerformancePerformance
StressStress
Trouble Free from Kentucky Performance Products is intended to help horses remain relaxed. Trouble Free contains alpha-lactalbumin which is intended to maintain calmness in horses.
Tru Breed (Hygain)
AntioxidantAntioxidant
BroodmareBroodmare
DigestionDigestion
GrowthGrowth
Tru Breed by Hygain is a soy-free extruded feed intended for breeding and growing horses.
Tru Care (Hygain)
DigestionDigestion
NutrientsNutrients
NutritionNutrition
SeniorSenior
Tru Care from Hygain is an extruded feed intended for horses requiring extra calories, such as senior horses. Tru Care contains glucosamine intended to support joint health.
Turbo Mag BCAA (Stride Animal Health)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
ExerciseExercise
HealthHealth
Turbo Mag BCAA from Stride Animal Health is a powdered electrolyte for horses. Turbo Mag BCAA is intended to support hydration levels and replace lost electrolytes.
Tye-Cal Max (Basic Equine Nutrition)
HealthHealth
Mineral BalanceMineral Balance
MuscleMuscle
VitaminsVitamins
Tye-Cal Max from Basic Equine Nutrition is an additive that is meant to assist in the relaxation of muscles in horses and to help prevent tying-up. It is a powdered supplement containing calcium, vitamins, and other minerals.
U-Balance Foundation (Uckele)
FiberFiber
Mineral BalanceMineral Balance
ProteinProtein
VitaminsVitamins
Uckele U-Balance Foundation is a pelleted vitamin, mineral, and amino acid supplement for horses. It is intended to balance the diet without adding significant calories. This supplement can also supports sugar metabolism.
Ulc-R-Aid (AniMed)
Gut HealthGut Health
ImmunityImmunity
Mineral BalanceMineral Balance
UlcersUlcers
Ulc-R-Aid from AniMed is a powdered supplement that is supposed to support horses prone to gastric ulcers. It aids in immune function and contains Colostrashield.
Ultimate (Doctor’s Choice Supplements)
Amino AcidAmino Acid
Metabolic SyndromeMetabolic Syndrome
Omega 3-6-9Omega 3-6-9
Ration BalancerRation Balancer
Ultimate by Doctor's Choice Supplements is a ration balancer intended for horses on pasture of forage. It contains high levels of calcium, thiamine and the first limiting amino acid lysine.
Ultimate (Greenline)
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
Greenline Ultimate is an equine vitamin, trace mineral, and amino acid supplement intended for everyday use. It provides Vitamin A, Vitamin D3, Pantothenic Acid, Folic Acid, Thiamine (B1), Vitamin B12, Choline, Cobalt, Vitamin E, Riboflavin (B2), Niacin, Pyridoxine, Biotin, and Iron.

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