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Thiamine Mononitrate (Vitamin B1) - Feed Ingredient

Thiamine mononitrate is a stable, synthetic form of Vitamin B1 (thiamine), commonly used in animal feed and supplements. It plays a crucial role in carbohydrate metabolism, aiding in the conversion of glucose into energy. This vitamin is also essential for proper nerve function, muscle coordination, and overall metabolic health. Horses typically obtain thiamine from their diet through cereal grains, brans, and brewer’s yeast, while microbial synthesis in the hindgut also contributes to their daily needs.

Deficiency of thiamine in horses is uncommon but can occur due to factors such as prolonged antibiotic use, excessive grain intake, or consumption of plants containing thiaminase (e.g., bracken fern or horsetail), which degrade the vitamin. Symptoms of deficiency may include weight loss, muscle weakness, incoordination, and nervous system disorders. Thiamine mononitrate supplementation may be recommended in cases where dietary intake is insufficient or when horses experience stress, intense exercise, or digestive disturbances. Since Vitamin B1 is water-soluble, toxicity is rare, and excess amounts are excreted in the urine.

The following equine feeds, supplements and products contain Thiamine Mononitrate (Vitamin B1) as an ingredient.

Feeds, Supplements & Products
Green-Vet Herbalmuesli (Havens Horsefeed)
DigestionDigestion
FatFat
GrainsGrains
NutritionNutrition
Green-Vet Herbalmuesli by Havens Horsefeed is a grain-based equine feed made of micronised cereals (barley, wheat, corn and oats). It also contains carrots, alfalfa and herbs such as eucalyptus and thyme.
GRO ‘N WIN Ration Balancer (BUCKEYE Nutrition)
Easy KeeperEasy Keeper
FiberFiber
Ration BalancerRation Balancer
ToplineTopline
Gro 'N Win is the original Buckeye Nutrition ration balancer that supplies minerals, vitamins and protein. It contains 13% NSC and 32% protein from sources such as soybean meal and alfalfa meal.
GRO ‘N WIN™ ALFA Ration Balancer (BUCKEYE Nutrition)
GrowthGrowth
HealthHealth
Ration BalancerRation Balancer
ToplineTopline
Gro 'N Win Alfa is a Buckeye ration balancer formulated with lower calcium to balance equine diets containing over 75% alfalfa hay. It is designed to provide minerals, vitamins, and proteins and has 18% NSC.
Gro-Fit (Ark Nutrition)
BroodmareBroodmare
Complete FeedComplete Feed
GrowthGrowth
LactationLactation
Gro-Fit by Ark Nutrition is a complete pelleted feed intended for growing horses, pregnant mares, lactating mares, and working horses. It contains various ingredients such as alfalfa meal, soyhulls, and wheat.
GROSTRONG 33 Ration Balancer (ADM Animal Nutrition)
NutritionNutrition
ProteinProtein
Ration BalancerRation Balancer
VitaminsVitamins
GroStrong 33 is a ration balancer that contains 33% protein. It provides a blend of vitamins and minerals to support maintenance, growth, reproduction and performance.
GROSTRONG Metabolic Mineral Pellet (ADM Animal Nutrition)
ElectrolyteElectrolyte
Gut HealthGut Health
MetabolismMetabolism
Ration BalancerRation Balancer
GroStrong Metabolic Mineral Pellet by ADM is a pelleted supplement intended for overweight, starch-sensitive and easy keeper horses. It contains a blend of organic and inorganic minerals in a corn-, alfalfa- and molasses- free formulation.
GROSTRONG Minerals (ADM Animal Nutrition)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
GroStrong Minerals is designed to provide a blend of organic and inorganic minerals. It is intended for maintenance, growth, reproduction and performance. It is available as a granular product or in a block.
Grotorque (Hygain)
BroodmareBroodmare
Grain FreeGrain Free
GrowthGrowth
StallionStallion
Grotorque from Hygain is a textured feed that is intended to support breeding or growing horses. It is grain free and contains pre and probiotics. It is meant to aid in immunity, circulation, gut health, muscle health, and recovery.
Grow Colt (Farnam)
GrowthGrowth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Farnam Grow Colt growth and development supplement is a pelleted vitamin and mineral supplement intended for foals under one year of age.
Growth (Equine Advantage)
FoalFoal
GrainsGrains
GrowthGrowth
Omega 3-6-9Omega 3-6-9
Growth is a textured feed formulated for young growing horses under 2 years old. This feed is highly palatable and provides moderate fibre levels from highly digestible sources including shredded beet pulp and soybean hulls.
Growth (Legends)
Complete FeedComplete Feed
FoalFoal
GrowthGrowth
LactationLactation
Legends Growth is a textured horse feed targeted to foals, growing horses, pregnant and lactating mares. It is formulated with higher amino acid content to support development.
Growth (Triple Crown)
FoalFoal
GrowthGrowth
LactationLactation
StallionStallion
Triple Crown Growth is a beet-pulp-based feed intended to support healthy growth and joints and meet the needs of broodmares and breeding stallions. It provides 10% fat and 15% crude fiber.
Growth Cubes (Tribute)
Bone HealthBone Health
DigestionDigestion
FatFat
FiberFiber
Tribute Growth Cubes are a cubed complete feed intended for growing horses between 3 months to 2 years and broodmares during gestation and lactation. Growth Cubes are high in protein (16%) and digestible fibre (18%).
Growth Pelleted (Woody’s Horse Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
NutritionNutrition
Woody's Growth Pelleted is a complete pelleted feed formulated for broodmares, foals, and growing horses. It contains added amino acids and chelated trace minerals. This feed contains a maximum of 15% crude fiber.
GROWTH Pelleted Horse Feed (BUCKEYE Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Buckeye GROWTH Pelleted Feed is a horse feed targeted to broodmares and growing horses. It provides higher levels of protein and added lysine.
Growth Pellets (Tribute)
FatFat
FiberFiber
GrowthGrowth
LactationLactation
Tribute Growth Pellet is a 15% NSC pelleted feed intended for broodmares during pregnancy and lactation and growing foals from 3 months to 2 years. It provides higher protein to support development.
Growth Textured (ProElite)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
ProElite Growth Horse Feed is a textured feed intended for foals, growing horses, and broodmares. It provides 16% protein to support development with a maximum NSC of 19.8%.
Growth Textured (Tribute)
Bone HealthBone Health
GrowthGrowth
LactationLactation
ProteinProtein
Tribute Growth Textured is a complete textured feed intended for broodmares during pregnancy and lactation as well as growing horses from 3 months to 2 years. It provides high protein levels which can support growth and is formulated for diets containing less than 50% legume forage.
Growth Textured (Woody’s Horse Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
NutritionNutrition
Woody’s Growth Textured is a complete textured feed formulated for broodmares, stallions, and growing horses. Omega-3 fatty acids is meant to help strengthen immune systems in both mare and foal.
GROWTH Textured Sweet Feed (BUCKEYE Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Growth Textured Sweet Feed by Buckeye is a complete feed designed for broodmares and growing horses. It provides fat, carbohydrates, and proteins from whole oats, soybean hulls, soybean oil and molasses. It contains 24% NSC.
Handimash (Hallway)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
ExerciseExercise
HydrationHydration
HandiMash from Hallway feeds is an electrolyte mash to increase fluid intake and replenish electrolytes lost after exercise or other stressful events. HandiMash is not intended to replace a daily feed regiment.
Hay Replacer Pellets (Kelley’s Feed)
FiberFiber
ForageForage
Hay StretcherHay Stretcher
NutritionNutrition
Kelley's Hay Replacer Pellets is a forage replacement made of alfalfa, bermuda, and mixed grasses. It also contains added molasses, vitamins, and minerals. This pelleted hay replacer is intended for all horses and ponies, especially those who have trouble chewing.
Healthy Balance Farmland Recipe Horse Feed (Dr. Pol)
Caloric EnergyCaloric Energy
HealthHealth
NutritionNutrition
SeniorSenior
Healthy Balance Farmland Recipe Horse Feed is an extruded feed that intends to enhance coat health and promotes lean muscle growth while supporting senior horses with bad or missing teeth.
Healthy Evolution Farmland Recipe Horse Feed (Dr. Pol)
DentalDental
GrainsGrains
Mineral BalanceMineral Balance
VitaminsVitamins
Healthy Evolution Farmland Recipe Horse Feed is an extruded feed intended to enhance coat health and promote lean muscle growth for pregnant/lactating mares and growing foals.
Heritage 14% Textured with 8% Fat (Big V Feeds)
Complete FeedComplete Feed
FoalFoal
MareMare
PerformancePerformance
Heritage 14% Textured with 8% Fat by Big V Feeds is a feed with a high protein, high fat, and moderate level of fibre. This feed includes ingredients such as oats, soybean meal, and vitamins and minerals.
Hi-E 11:10 Horse Pellet (Bartlett Milling) [Discontinued]
Complete FeedComplete Feed
FatFat
FiberFiber
ProteinProtein
Hi-E 11:10 Horse Pellet is an 11% protein and 10% fat complete feed that utilizes wheat middlings, corn products, soy hulls, alfalfa meal and soy oil as its energy sources.
High Country Sweet (Kelley’s Feed)
Caloric EnergyCaloric Energy
ExerciseExercise
FlavorFlavor
NutritionNutrition
High Country Sweet by Kelley's Feed is a grain-based feed with added vitamins and minerals. It contains oats, barley, and corn. It is formulated to provide 12% crude protein.
High Endurance (Cox Vet Lab)
Amino AcidAmino Acid
PerformancePerformance
RecoveryRecovery
StaminaStamina
High Endurance is a supplement intended to be given before and after an event to help replace vitamins, minerals, and amino acids lost during performance.
High Energy 11:8 Sweet Horse (Bartlett Milling) [Discontinued]
Caloric EnergyCaloric Energy
ExerciseExercise
FlavorFlavor
PerformancePerformance
High Energy 11:8 Sweet Horse is a sweet feed intended for working horses that require additional energy. It provides 11% protein and 8% fat from corn, oats, and soybean oil.
High Fat Horse Nugget (Alfa Force Equine)
Complete FeedComplete Feed
FiberFiber
NutrientsNutrients
NutritionNutrition
High Fat Nuggets by Alfa Force Equine is a pelleted feed that can replace all forage. It is intended for pleasure, performance, or breeding horses.
High Fat Horse Pellet (Alfa Force Equine)
FatFat
HealthHealth
NutrientsNutrients
NutritionNutrition
High Fat Horse Pellet by Alfa Force Equine is a pelleted feed intended for all classes of horses.
High Impact (HorseLogic)
Hoof HealthHoof Health
JointsJoints
MuscleMuscle
PerformancePerformance
High Impact from HorseLogic is a hoof and joint supplement. High Impact contains amino acids and biotin for hoof health, plus MSM, glucosamine, collagen, and chondroitin for joint health.
High Performance (Thomas Moore Feed)
EnergyEnergy
NutrientsNutrients
PerformancePerformance
YeastYeast
High Performance from Thomas Moore Feed is a high energy feed that is intended for performance horses. It also contains minerals, vitamins and yeast.
High Step (Equi-lete)
Easy KeeperEasy Keeper
Hoof HealthHoof Health
ImmunityImmunity
Skin + HairSkin + Hair
High Step by Equi-lete is a vitamin and mineral supplement intended to support overall health in pleasure horses, easy keepers and non-performance horses.
High VAULTage (Equi-lete)
HealthHealth
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
High VAULTage by Equi-lete is a vitamin and mineral supplement intended to support health, performance and recovery in performance horses and hard keepers.
High-Fat Sweet 10 (Manna Pro) [Discontinued]
Complete FeedComplete Feed
FlavorFlavor
HealthHealth
NutritionNutrition
High-Fat Sweet 10 from Manna Pro is designed for active pleasure horses, broodmares, and stallions. It contains 10% crude protein, 5% crude fat, 10% crude fibre, and uses inorganic trace minerals.
Hiland’s Big Sky Mineral (Hiland Supply Co. Ltd)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Hiland's Big Sky Mineral by Hiland Supply Co. Ltd is a mineral supplement intended to support overall health in all horse types.
Hoof + Hair (Bluebonnet Feeds)
Coat QualityCoat Quality
Hoof HealthHoof Health
NutrientsNutrients
Skin + HairSkin + Hair
Hoof + Hair by Bluebonnet Feeds is a vitamin and mineral supplement intended to support healthy hooves and coat in all horse types.
Hoof Organic (Advanced Biological Concepts)
HealthHealth
Hoof HealthHoof Health
ImmunityImmunity
VitaminsVitamins
Hoof Organic from Advanced Biological Concepts is a pelleted hoof supplement for horses. Hoof Organic is fortified with trace minerals and biotin intended for hoof growth.
Hoof Pro Plus (Excel Equine)
HealthHealth
Hoof HealthHoof Health
NutrientsNutrients
RecoveryRecovery
Hoof Pro Plus by Excel Equine is a pelleted hoof supplement formulated to support normal hoof growth and overall hoof quality. It contains biotin, methionine, calcium, and zinc.
Horse Block (DuMor)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
ProteinProtein
DuMor Horse Block is a vitamin, mineral, and protein supplement for horses in a block format. It contains predominantly inorganic trace minerals and is intended to be offered free choice.
Horse Cubes (Alfa Force Equine)
HealthHealth
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
NutritionNutrition
Horse Cubes by Alfa Force Equine is a pelleted feed intended for all classes of horses.
Horse Guard
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Horse Guard is a pelleted, concentrated vitamin-mineral supplement designed for all classes of horses. The recommended feeding rate is 2 oz per day.
Horse Low Starch Ration Balancer (Modesto Milling)
FiberFiber
ProteinProtein
Ration BalancerRation Balancer
VitaminsVitamins
Horse Low Starch Ration Balancer from Modesto Milling is a ration balancer containing 20% protein, 19% fiber and 9.7% fat. It also contains vitamins and minerals.
Horse Maintenance Formula (Bartlett Milling) [Discontinued]
Easy KeeperEasy Keeper
HealthHealth
NutritionNutrition
Ration BalancerRation Balancer
Bartlett Horse Maintenance Formula is a 13.5% protein and 3.5% fat pelleted feed. It is designed to supply a lower energy density for horses at maintenance.
Horse Mineral (Hoffman’s Horse Products)
DigestionDigestion
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Hoffman's Horse Mineral is an equine mineral and vitamin supplement primarily intended for free-choice feeding large herds. It does not contain sugars, grains, or added starches.
Horse Munch (Bartlett Milling) [Discontinued]
Caloric EnergyCaloric Energy
Easy KeeperEasy Keeper
FlavorFlavor
Ration BalancerRation Balancer
Bartlett Horse Munch is a pelleted feed containing added molasses. It is formulated for horses at maintenance or easy keepers with 15% fibre, 14% protein, and 3.5% fat.
Horse Nugget (Alfa Force Equine)
HealthHealth
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
NutritionNutrition
Horse Nugget by Alfa Force Equine is a pelleted feed intended for all classes of horses.
Horse Pellet 110 Plus (Bartlett Milling) [Discontinued]
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Horse Pellet 110 Plus is an 11% protein and 5% fat complete feed with added lysine and methionine. Energy sources include wheat middlings, ground corn, soybean hulls, and alfalfa meal.
Horse PLUS (Modesto Milling)
Caloric EnergyCaloric Energy
GrainsGrains
NutritionNutrition
ProteinProtein
Horse PLUS by Modesto Milling is a textured horse feed made using mostly organic ingredients. This feed contains grains, alfalfa, coconut meal, sunflower seeds, carrot pellets, flaxseed as well as added vitamins and minerals. It provides 12% crude protein, 4.5% fat and 13% crude fiber.

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