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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
Staminoats (Hallway)
BroodmareBroodmare
GrowthGrowth
LactationLactation
NutritionNutrition
Staminoats from Hallway is a cubed feed fortified with Stamm 30, formulated for broodmares and young growing horses. This feed provides 14% protein, 3% fat, and 11% fibre.
Stamm 30 (Hallway)
BroodmareBroodmare
FoalFoal
GrowthGrowth
StallionStallion
Stamm 30 from Hallway is a vitamin and mineral pellet formulated for growing, reproducing, recreational and performance horses. This can be fed alone to easy keepers, or used to top dress feed for horses not getting the full feeding rate of concentrate feeds. Stamm 30 is used in other Hallway feeds as the source of vitamins and minerals.
Starch Wise (ProElite)
Gut HealthGut Health
NutritionNutrition
PerformancePerformance
SeniorSenior
ProElite Starch Wise is a pelleted horse feed with a maximum 14.5% NSC. It is formulated with moderate levels of starch and sugar for mature show and performance horses.
Steady Energy Formula (Bartlett Milling) [Discontinued]
EnergyEnergy
FatFat
Grain FreeGrain Free
PerformancePerformance
Bartlett Steady Energy Formula is a pelleted feed intended for mature horses that require lower levels of energy in their diet. It provides 12% protein and 6% fat.
Stock Builder (Star Milling Co)
ExerciseExercise
GrowthGrowth
MuscleMuscle
ProteinProtein
Stock Builder by Star Milling Co is a high protein supplement formulated with ingredients such as soybean meal, ground cereal grains and whey. It contains a minimum of 25% protein and no added minerals and vitamins.
Strucomix Senior (Cavalor)
Complete FeedComplete Feed
DigestionDigestion
FiberFiber
SeniorSenior
Strucomix Senior by Cavalor is a high-fibre feed formulated with puffed and extruded grains to improve digestibility. It contains 14% protein that help support weight and muscle maintenance.
SU-PER Appetite Liquid (Gateway Products)
DigestionDigestion
Feed EfficiencyFeed Efficiency
VitaminsVitamins
Weight IssuesWeight Issues
SU-PER Appetite Liquid by Gateway Products is a supplement that supports a healthy appetite without the use of stimulants. This supplement contains vitamins B-1 and B-12, which can help increase appetite.
SU-PER B-Plex Paste (Gateway Products)
EnergyEnergy
PerformancePerformance
StressStress
VitaminsVitamins
SU-PER B-Plex Paste by Gateway Products is a performance supplement to provide more energy, increased stamina, and improved focus. It contains all of the major B-Complex vitamins together in one supplement.
SU-PER B-Plex Powder (Gateway Products)
EnergyEnergy
StaminaStamina
StressStress
VitaminsVitamins
SU-PER B-Plex Powder by Gateway Products is a performance supplement to provide more energy, increased stamina, and improved focus. It contains all of the major B-Complex vitamins together in one supplement.
SU-PER Form Pellets (Gateway Products)
HealthHealth
Mineral BalanceMineral Balance
ProbioticProbiotic
VitaminsVitamins
SU-PER Form Pellets by Gateway Products is a vitamin and mineral supplement that provides all the necessary nutrients. This supplement also includes additional amino acids and electrolytes and is meant for horses of all life stages.
SU-PER Gain Weight (Gateway Products)
Amino AcidAmino Acid
Feed EfficiencyFeed Efficiency
MuscleMuscle
Weight IssuesWeight Issues
SU-PER Gain Weight by Gateway Products is a weight-gaining product designed for hard keepers. It contains coconut oil as its fat source, the essential amino acids for muscle retention, and probiotics to aid in nutrient absorption.
SU-PER Jug Paste (Gateway Products)
Amino AcidAmino Acid
EnergyEnergy
PerformancePerformance
VitaminsVitamins
SU-PER Jug Paste is an energy supplement meant to provide stamina, performance, and energy. This supplement offers vitamins and minerals, electrolytes, and amino acids to ensure proper nutrient levels before a race or restore balance.
SU-PER Show Coat Powder (Gateway Products)
Coat QualityCoat Quality
Mineral BalanceMineral Balance
Skin + HairSkin + Hair
VitaminsVitamins
SU-PER Show Coat Powder is a supplement that supports a healthy coat and skin. This supplement contains flaxseed meal as a source of essential fatty acids and additional vitamins and minerals for better nutrient absorption.
Summer Heat (Woody’s Horse Nutrition)
Competition HorsesCompetition Horses
DigestionDigestion
FiberFiber
PerformancePerformance
Woody’s Summer Heat is a complete feed formulated for performance horses in heavy to intense work. It contains 12.5% protein and 7.0% fat, and is made with oats, barley, molasses and beet pulp.
Summit Active (Hubbard Feeds)
GrowthGrowth
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Summit Active from Hubbard is a concentrated feed intended for performance horses. It provides 14% crude protein and contains grains, plant proteins, forage products, and vegetable oil.
Summit Senior (Hubbard Feeds)
Coat QualityCoat Quality
Gut HealthGut Health
NutrientsNutrients
SeniorSenior
Summit Senior from Hubbard is a complete feed intended for senior horses at maintenance with dental issues. It contains 14% crude protein and provides digestible energy and protein from mostly forage sources.
Summit® Classic + (Hubbard Feeds)
Complete FeedComplete Feed
Gut HealthGut Health
ImmunityImmunity
NutrientsNutrients
Summit Control+ from Hubbard is a concentrated feed intended for horses at multiple life stages and work levels. It contains 12% crude protein and energy sources from grain products, plant proteins, and forage.
Sunshine Plus Pelleted Horse Feed (Blue Seal)
Complete FeedComplete Feed
ProteinProtein
VitaminsVitamins
YeastYeast
Sunshine Plus is a high protein (30%) pelleted feed containing soybean meal and whey. Energy sources include cane molasses, wheat middlings, oil, and corn distillers grains.
Super 16 (Hallway)
BroodmareBroodmare
GrowthGrowth
LactationLactation
NutritionNutrition
Super 16 is a textured sweet feed fortified with Stamm 30 formulated for growing horses and broodmares in peak lactation. This feed uses whole and rolled grains with molasses as energy sources. Super 16 contains 16% protein, 3.5% fat, and 9% fibre.
Super Horse 12-12 (Manna Pro)
BroodmareBroodmare
Complete FeedComplete Feed
NutritionNutrition
PerformancePerformance
Super Horse 12-12 from Manna Pro is a textured sweet feed formulated for performance horses, broodmares, and stallions. Super Horse 12-12 contains 12% crude protein, 6% crude fat, and 7% crude fiber.
Super Horse Manna Senior (Manna Pro)
DentalDental
NutritionNutrition
SeniorSenior
Weight IssuesWeight Issues
Super Horse Manna Senior from Manna Pro is a beet pulp-based feed designed for senior horses. It contains 12.5% crude protein, 4% crude fat, 18% dietary starch, 7% sugars, and a mix of organic and inorganic trace minerals.
Super Horse Performance 10 (Manna Pro)
ExerciseExercise
GrainsGrains
NutritionNutrition
PerformancePerformance
Super Horse Performance 10 from Manna Pro is available as a pellet or a textured feed. Super Horse Performance 10 contains 10% crude protein, 6% crude fat, 7% crude fibre, and uses a mix of organic and inorganic trace minerals.
Super So-Kalm Powder (Equine America)
Amino AcidAmino Acid
CalmingCalming
Mineral BalanceMineral Balance
StressStress
Super So-Kalm Powder from Equine America is a concentration and focus supplement for horses. It is intended to assist with calming and reducing stress and it contains minerals.
Super Staminoats (Hallway)
BroodmareBroodmare
GrowthGrowth
LactationLactation
NutritionNutrition
Super Staminoats from Hallway is a cubed feed fortified with Stamm 30, formulated for gestating or lactating broodmares, and young growing horses. This feed contains 16% protein, 3% fat, and 9.5% fibre.
Super Weight Gain (Horse Guard)
Coat QualityCoat Quality
HealthHealth
NutritionNutrition
Weight IssuesWeight Issues
Super Weight Gain by Horse Guard, is a supplement intended for healthy weight gain and enhancing coat condition. This supplement contains full-fat soybeans, prebiotics, probiotics and a vitamin mineral package.
Superforce (Cavalor)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
EnergyEnergy
PerformancePerformance
Cavalor Superforce is a high-calorie textured feed intended for performance horses during competition. It provides energy from high NSC (sugar and starch) sources including oats and cane molasses.
SuperSport Amino Acid Supplement (Purina)
Amino AcidAmino Acid
PerformancePerformance
RecoveryRecovery
ToplineTopline
Purina® SuperSport® Amino Acid is a supplement intended for performance equine athletes. It provides 40% crude protein in a pelleted format to support muscle development.
Support Pro (Formula 707)
CalmingCalming
DigestionDigestion
Gut HealthGut Health
UlcersUlcers
Support Pro from Formula 707 is a pelleted supplement that is intended to support digestion, stomach and hindgut health. It is also meant for calming or ulcer support.
SupportPRO (Horse Logic Pro) – [Discontinued]
Competition HorsesCompetition Horses
Gut HealthGut Health
HealthHealth
ImmunityImmunity
SupportPRO from Horse Logic Pro is a pelleted gut supplement. SupportPRO is intended to provide hindgut support to horses who struggle with gastric issues during periods of stress. SupportPRO contains 12% crude protein and 1.25% fat.
SUPREME™ 10 Pelleted Feed (BUCKEYE Nutrition)-[Discontinued]
Complete FeedComplete Feed
Gut HealthGut Health
HealthHealth
Ration BalancerRation Balancer
SUPREME™ 10 Pelleted Feed is a now-discontinued feed that provided 10% crude protein in a fortified grain mix. It was formulated to support the nutritional needs of mature horses.
SUPREME™ 14 Pelleted Feed (BUCKEYE Nutrition)
Complete FeedComplete Feed
Gut HealthGut Health
NutritionNutrition
Ration BalancerRation Balancer
SUPREME 14 Pelleted Feed by Buckeye Nutrition is a complete feed with 14% crude protein. It is formulated to support the nutritional needs of mature horses in light to moderate work, seniors, and the breeding herd. SUPREME 14 contains a total of 28% NSC.
Surge Paste (Bluebonnet Feeds)
CirculationCirculation
CardiovascularCardiovascular
Hoof HealthHoof Health
RespiratoryRespiratory
Surge Paste by Bluebonnet Feeds is a paste supplement intended to support lung health and circulation in horses.
Surge Powder (Bluebonnet Feeds)
CirculationCirculation
Hoof HealthHoof Health
RespiratoryRespiratory
StressStress
Surge Powder by Bluebonnet Feeds is a powdered supplement intended to support blood circulation and lung health in horses experiencing intense work or stress.
SweatAgain (AniMed)
Amino AcidAmino Acid
ElectrolyteElectrolyte
Mineral BalanceMineral Balance
VitaminsVitamins
SweatAgain from AniMed is a powdered electrolyte supplement. It contains amino acids, vitamins, minerals and more, which all contribute to a horse's ability to sweat normally and maintain a healthy body temperature.
Sweet ‘N Safe (Daily Dose Equine)
Caloric EnergyCaloric Energy
FatFat
FlavorFlavor
GrainsGrains
Sweet 'N Safe by Daily Dose Equine is a textured feed for the average horse needing a higher caloric intake. It contains energy sources such as roasted whole oats, roasted whole barley, and roasted whole soybeans.
Sweet 10 (Excel Equine Feeds)
Easy KeeperEasy Keeper
EnergyEnergy
HealthHealth
NutritionNutrition
Sweet 10 is a textured feed from Excel Equine Feeds. This feed is intended for easy keepers or horses in light work.
Sweet 12% Textured (Agrimaster)
Gut HealthGut Health
Hoof HealthHoof Health
MuscleMuscle
Skin + HairSkin + Hair
Sweet 12% Textured by Agrimaster is a textured feed intended to support health and performance of all horse types.
Sweet Pellet (Seminole)
EnergyEnergy
FlavorFlavor
Mineral BalanceMineral Balance
NutritionNutrition
Seminole Sweet Pellet is a pelleted feed intended for horses, cattle, and goats. It contains 16% NSC, minerals, and antioxidants and is formulated with soybean hulls, grains, corn, and molasses.
Synergize (Tribute)
FatFat
Gut HealthGut Health
Low NSC FeedsLow NSC Feeds
PerformancePerformance
Synergize by Tribute is a pelleted feed intended for hard-keepers and horses with a heavy workload that are sensitive to sugar and starch.
Synergy (Ark Nutrition)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Ark Nutrition Synergy is a concentrated mineral and vitamin premix containing 100% organic selenium and a blend of inorganic and organic trace minerals. It contains no molasses, fillers or artificial flavours.
Synergy Compete (SEB Equine)
HealthHealth
NutrientsNutrients
NutritionNutrition
PerformancePerformance
Synergy Compete by SEB Equine is a supplement intended to support overall health in performance horses.
TAB (Hallway)
Mineral BalanceMineral Balance
NutritionNutrition
ProteinProtein
VitaminsVitamins
Hallway Feed's TAB is a concentrated pelleted feed intended to balance the diet of horses fed alfalfa hay. It can be fed to horses at all life stages and has a lower feeding rate.
TDI 12% (TDI Horse Feeds)
Easy KeeperEasy Keeper
EnergyEnergy
HealthHealth
NutritionNutrition
TDI 12% from TDI Horse Feeds is an oat based, pelleted feed. TDI 12% is intended for adult horses in light to moderate work. This feed contains added vitamins, minerals, and yeast.
TDI-10 Supplement (Ace Hi Feeds)
BroodmareBroodmare
Easy KeeperEasy Keeper
NutritionNutrition
Ration BalancerRation Balancer
TDI-10 by Ace Hi Feeds is a soy-free feed intended for pregnant mares or easy keepers. It contains at least 10% crude protein and added vitamins and minerals. This feed is meant to be fed alongside a forage.
Thorough-Bread (Sacate Pellet Mills)
FiberFiber
NutrientsNutrients
PerformancePerformance
ProteinProtein
Thorough-Bread from Sacate Pellet Mills is a pelleted feed meant for moderate to heavy working horses or nursing mares.
ThriveFeed Horse Feed
ForageForage
Gut HealthGut Health
HealthHealth
NutrientsNutrients
ThriveFeed is a pelleted horse feed composed of alfalfa meal, timothy grass meal, sorghum, soybean meal, rice bran and kelp meal. It provides 15% protein, 2.5% fat and 20% fiber.
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.

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