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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.
Alfa-Pro Elite (Hi-Pro Feeds)
ForageForage
Grain FreeGrain Free
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
Alfa-Pro Elite by Hi-Pro Feeds is a fortified, ground alfalfa cube. It is grain-free and low in NSC, making it suitable for horses with metabolic conditions.
AlfaForce Yellow Tag (AlfaForce Equine)
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
PerformancePerformance
ProteinProtein
AlfaForce Yellow Tag by AlfaForce Equine is a pelleted feed designed for all classes of horses. It is formulated with 16% protein, 3% fat and has a maximum non-structural carbohydrate level of 13.9%.
Alfalfa Advantage (ProElite)
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
ProElite Alfalfa Advantage is a low-feeding rate pelleted ration balancer intended to balance diets composed of alfalfa forages. It can be fed to all classes of horses.
Alfalfa Bermuda Blend Pellets (Ametza)
FiberFiber
ForageForage
Mineral BalanceMineral Balance
VitaminsVitamins
Alfalfa Bermuda Blend Pellets by Ametza is a pelleted feed that is meant to provide energy from sources such as alfalfa and Bermuda hay. It is intended for horses in light to moderate work.
Alfalfa Bermuda Hay Pellets (Ace Hi Feeds)
FiberFiber
ForageForage
Gut HealthGut Health
NutritionNutrition
Alfalfa Bermuda Hay Pellets can be used as a forage replacement for horses. This product also contains added vitamins and minerals. This feed is beneficial for older horses who have difficulty chewing.
Alfalfa Hay & Grain Pellets (Ace Hi Feeds)
FiberFiber
ForageForage
GrainsGrains
NutritionNutrition
Alfalfa Hay & Grain Pellets contain a blend of alfalfa forage and ground grain (barley or corn). This product contains a minimum of 12.5% protein, as well as added vitamins and minerals.
Alfalfa Hay Pellets (Ace Hi Feeds)
FiberFiber
ForageForage
Gut HealthGut Health
NutritionNutrition
Alfalfa Hay Pellets are a high protein forage source for horses. It contains a minimum of 14% protein and has added vitamins and minerals. This feed is beneficial for older horses, horses with bad teeth, or horses who are sensitive to breathing in dust from long-stem hay.
Alfalfa Hay Pellets (Kelley’s Feed)
FiberFiber
ForageForage
NutritionNutrition
ProteinProtein
Kelley's Feed Alfalfa Hay Pellets by is an alfalfa-based feed in a pelleted form with molasses for palatability. Hay pellets are recommended for horses with dental or respiratory issues. This forage replacement contains added vitamins and inorganic minerals.
Alfalfa Pellets (Ametza)
FiberFiber
ForageForage
Mineral BalanceMineral Balance
VitaminsVitamins
Alfalfa Pellets by Ametza is a pelleted feed that is intended to supply horses of all life stages with adequate energy. This feed contains alfalfa and is designed for maintenance or moderate to heavy working animals.
Alfalfa Support (Pureform)
AntioxidantAntioxidant
JointsJoints
Mineral BalanceMineral Balance
VitaminsVitamins
Pureform Alfalfa Support is a vitamin/mineral supplement designed for horses on diets containing high levels of alfalfa hay. It is suitable for all life stages and includes ingredients for joint health, such as glucosamine and MSM.
Alfalfa-Oat Hay Pellets (Ace Hi Feeds)
FiberFiber
ForageForage
NutritionNutrition
ProteinProtein
Alfalfa-Oat Hay Pellets by Ace Hi Feeds can be used as a forage replacement for horses. This product contains at least 12% protein, added molasses, and added vitamins and minerals.
Alfalfa/Bermuda Hay Pellets (Star Milling Co)
DentalDental
FiberFiber
ForageForage
NutritionNutrition
Alfalfa/Bermuda Hay Pellets by Star Milling Co are a blend of alfalfa and Bermuda hay designed as a forage replacement for horses. It contains 32% fiber and 11% protein in a 3/8 inch pellet with added molasses, vitamins, and minerals.
Alfalfa/Oat Hay Pellets (Kelley’s Feed)
FiberFiber
ForageForage
GrainsGrains
NutritionNutrition
Alfalfa/Oat Hay Pellets by Kelley's Feed is a pelleted forage replacement containing alfalfa and oat hay with added vitamins and minerals. Molasses is used for palatability and as an energy source.
AlfaMax RX (Alfamax Feed)
Complete FeedComplete Feed
DigestionDigestion
HealthHealth
Low NSC FeedsLow NSC Feeds
AlfaMax RX from Alfamax Feed is a complete pelleted feed. AlfaMax RX contains no soybean meal & is intended for horses' requiring a low NSC content (starch + sugars).
Align (OE Nutraceuticals)
Gut HealthGut Health
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Align is a vitamin and mineral supplement intended for performance horses. It contains prebiotics and probiotics which are meant to support gut health.
All Grain (Seminole)
Complete FeedComplete Feed
FlavorFlavor
GrainsGrains
NutritionNutrition
Seminole All Grain is a textured feed formulated with oats, corn, soybean meal and molasses. It contains 46% NSC, vitamins, chelated minerals, antioxidants, and yeast culture. This feed is intended for mature pleasure horses.
All In (Woody’s Horse Nutrition)
HealthHealth
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
All In by Woody’s Horse Nutrition is a pelleted vitamin and mineral supplement intended for horses on a forage-based or unfortified grain diet. It contains the limiting amino acids lysine, methionine, and threonine.
All Phase 20 – Pelleted (Brooks)
HealthHealth
Organic Trace MineralsOrganic Trace Minerals
Ration BalancerRation Balancer
VitaminsVitamins
All Phase 20 is a pelleted ration balancer designed to supply protein, vitamins, and minerals to diets not containing the recommended daily serving of complete feed. This pelleted feed also contains biotin and yeast culture to support digestive and hoof health.
All Stock Block (Sweet Country Feeds)
Mineral BalanceMineral Balance
NutritionNutrition
ProteinProtein
VitaminsVitamins
All Stock Block by Sweet Country Feeds is a protein supplement intended for free-choice consumption by multiple livestock species including horses. It contains 20% protein and 4.5% fat.
All-In-One Supplement (Extreme Equine Supplements)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
NutritionNutrition
VitaminsVitamins
All-In-One Supplement by Extreme Equine Supplements is a comprehensive vitamin and mineral formula designed to support overall health and development in horses.
All-Phase (Kentucky Equine Research)
EnergyEnergy
Mineral BalanceMineral Balance
ProteinProtein
VitaminsVitamins
KER All-Phase is a pelleted ration balancer for horses in all life stages. It contains 26% protein and 3% fat.
All-Phase Balancer Formula (Bartlett Milling) [Discontinued]
GrainsGrains
NutritionNutrition
ProteinProtein
Ration BalancerRation Balancer
Bartlett All-Phase Balancer Formula is a grain balancer pellet intended for all classes of horses to supply protein, vitamins and minerals that may be lacking in the equine diet.
Alltrack (Textured) (Masterfeeds)
Gut HealthGut Health
Low NSC FeedsLow NSC Feeds
MuscleMuscle
PerformancePerformance
Alltrack (Textured) by Masterfeeds is a textured complete feed intended to support digestive and muscle health in high performance horses.
Alpaca Concentrate Pellet (Bar Ale)
HealthHealth
NutrientsNutrients
NutritionNutrition
VitaminsVitamins
Alpaca Concentrate Pellet is a concentrated pelleted feed intended to be fed to alpacas. It contains 18% protein, 2.9% fat, and 18.5% fiber.
Amber Grains Classic 12-4 Fiberwise (Coker Feed Mill)
DigestionDigestion
Easy KeeperEasy Keeper
FiberFiber
RecoveryRecovery
Amber Grains Classic 12-4 Fiberwise by Coker Feed Mill is a high-fiber (20%) textured feed intended for easy keepers and horses in recovery.
Amber Grains Classic 12-5 Pellet (Coker Feed Mill)
DigestionDigestion
HealthHealth
NutrientsNutrients
NutritionNutrition
Amber Grains Classic 12-5 Pellet by Coker Feed Mill is a pelleted feed intended for active horses not in heavy work.
Amber Grains Classic 12-6 Textured (Coker Feed Mill)
NutrientsNutrients
NutritionNutrition
PrebioticPrebiotic
ProbioticProbiotic
Amber Grains Classic 12-6 Textured by Coker Feed Mill is a textured feed intended to supplement hay. It is designed for active horses not in heavy work.
Amber Grains Classic 14-8 Pellet (Coker Feed Mill)
DigestionDigestion
Gut HealthGut Health
HealthHealth
ProbioticProbiotic
Amber Grains Classic 14-8 Pellet by Coker Feed Mill is a corn-free pelleted feed intended to support overall health in horses in moderate work and older horses with sensitive digestive systems.
Amber Grains Classic Senior Textured (Coker Feed Mill)
DigestionDigestion
FiberFiber
Gut HealthGut Health
SeniorSenior
Amber Grains Classic Senior Textured by Coker Feed Mill is a textured feed intended to support digestion and body condition in senior horses.
Amber Grains Elite 10-10 Performance (Coker Feed Mill)
DigestionDigestion
EnergyEnergy
MuscleMuscle
PerformancePerformance
Amber Grains Elite 10-10 Performance by Coker Feed Mill is a high calorie textured feed intended to support digestion, muscle gain and endurance in performance horses.
Amber Grains Elite 12-12 Performance (Coker Feed Mill)
DigestionDigestion
EnergyEnergy
Gut HealthGut Health
PerformancePerformance
Amber Grains Elite 12-12 Performance by Coker Feed Mill is a textured feed intended to provide cool energy for performance horses.
Amber Grains Elite Front Runner (Coker Feed Mill)
Caloric EnergyCaloric Energy
EnergyEnergy
Gut HealthGut Health
PerformancePerformance
Amber Grains Elite Front Runner by Coker Feed Mill is a high-energy feed intended for performance. It is formulated to support strength, stamina and endurance in horses.
Amber Grains Elite Mare and Foal (Coker Feed Mill)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Amber Grains Elite Mare and Foal by Coker Feed Mill is a textured feed intended to support overall health in pregnant mares, lactating mares and growing foals.
Amber Grains Elite Serenity Ultra LS (Coker Feed Mill)
HealthHealth
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
SeniorSenior
Amber Grains Elite Serenity Ultra LS by Coker Feed Mill is a low NSC (8.94%) pelleted feed intended for horses with sensitive digestive systems.
Amber Grains Elite Super Senior (Coker Feed Mill)
DigestionDigestion
FiberFiber
ProbioticProbiotic
SeniorSenior
Amber Grains Elite Super Senior by Coker Feed Mill is a textured feed intended to support overall health and digestion in senior horses.
AniVite (AniMed)
Coat QualityCoat Quality
HealthHealth
Skin + HairSkin + Hair
VitaminsVitamins
AniVite from AniMed suggests to support the appearance and condition of horses. It is said to be palatable, easy to use, and also safe to use in foals and lactating mares.
Apple Smacks Horse Treats (Star Milling Co)
Caloric EnergyCaloric Energy
GrainsGrains
NutritionNutrition
ProteinProtein
Apple Smacks by Star Milling Co is an apple-flavoured treat designed to be fed in small amounts as a special treat. It contains no less than 14.0% protein and is fortified with minerals and vitamins.
Arizona Copper Complete (Horse Tech)
HealthHealth
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
VitaminsVitamins
Arizona Copper Complete is a vitamin and mineral supplement for horses containing copper and other trace minerals in an organic amino acid complex. The supplement also provides vitamins and amino acids in a milled flax base.
Artoa Pellets (Ametza)
FiberFiber
ForageForage
GrainsGrains
PerformancePerformance
Artoa Pellets by Ametza is a pelleted feed that provides energy through sources such as alfalfa hay and cracked corn. It contains a low grain level to minimize a variety of metabolic issues.
At-Ease (Select the Best)
Amino AcidAmino Acid
CalmingCalming
Mineral BalanceMineral Balance
VitaminsVitamins
At-Ease is a horse supplement purported to promote a calm mood. It is formulated with the B-vitamins, thiamine, and pyridoxine. It also includes the amino acid tryptophan and magnesium oxide.
Athletic Formula (Full Bucket Equine)
HealthHealth
HindgutHindgut
ImmunityImmunity
YeastYeast
Athletic Formula from Full Bucket Equine is a pelleted supplement containing probiotics, prebiotics, vitamins, minerals and digestive enzymes. This supplement is intended to provide nutritional support to the horses' gastrointestinal mucosa.
B-Gooood!! (Doctor’s Choice Supplements)
Amino AcidAmino Acid
CalmingCalming
Mineral BalanceMineral Balance
StressStress
B-Gooood is a pelleted supplement intended for horses and ponies that need a mood enhancer to help them stay focused. It is designed for mare and geldings on a limited exercise program or on stall rest.
B-Tonic (MVP)
Blood CellsBlood Cells
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
B-Tonic by MVP is a liquid supplement that contains B Vitamins and iron that intend to help support the production of hemoglobin in red blood cells. It intends to correct deficiencies, stimulate appetites and help nervous horses.
Balance I (AniMed)
Amino AcidAmino Acid
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Balance I from AniMed is a supplement that states it aids in health and body condition of horses by containing amino acids, fatty acids, vitamins and minerals, and antioxidants. It claims to be formulated for horses fed alfalfa hay.
Balance II (AniMed)
Amino AcidAmino Acid
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Balance II from AniMed is a supplement that states it aids in health and body condition of horses by containing amino acids, fatty acids, vitamins and minerals, and antioxidants. It claims to be formulated for horses fed grass hay.
Balance Supplement (Peninsula Performance Feeds)
HealthHealth
ImmunityImmunity
Mineral BalanceMineral Balance
NutritionNutrition
Balance Supplement from Peninsula Performance Feeds is a pelleted ration balancing supplement for horses. Balance Supplement contains chelated trace minerals and is intended to be fed as the sole ration for easy keepers.
Balanced (Hygain)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
VitaminsVitamins
Balanced by Hygain is feed that intends to be fed as a ration balancer, providing a protein level of 25%, minerals, and vitamins for horses that are easy keepers or on a pasture-only diet.
Balanced Pelleted Horse Mineral (Equiline)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Balanced Pelleted Horse Mineral from Equiline is a pelleted supplement that is meant to provide vitamins and minerals to meet the needs of adult horses. It can be supplied to horses eating hay or grain and any activity level.
Balancer (Triple Crown)
Easy KeeperEasy Keeper
Metabolic SyndromeMetabolic Syndrome
NutritionNutrition
Ration BalancerRation Balancer
Triple Crown® Balancer is a pelleted mineral and vitamin supplement providing 30% protein, 3% fat and 5% fibre. This ration balancer contains essential amino acids, vitamins, macro minerals, trace minerals, bacteria and enzymes.
Balancer Gold (Triple Crown)
Easy KeeperEasy Keeper
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Ration BalancerRation Balancer
Balancer Gold is a soy-free ration balancer with 13.5% protein, 4.5% fat and 14.2% NSC. It has a lower feeding rate and can be used alone or in combination with other complete feeds or feed ingredients.

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