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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
Eq-Well (Arenus Animal Health)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
NutritionNutrition
Eq-Well by Arenus Animal Health is an equine vitamin and mineral balancer. It is a granular supplement intended for horses of all ages and work levels.
EQ8 Gut Health (Buckeye)
DigestionDigestion
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
EQ8 Gut Health is a textured feed intended for horses in maintenance to moderate exercise. This feed provides 20% NSC and contains calcium, prebiotics, probiotics and yeast to support digestive health.
EQ8 Performance Gut Health (Buckeye)
DigestionDigestion
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
EQ8 Performance Gut Health is a calorie-dense extruded feed for active horses. This feed contains 20% NSC, 14% protein and 12% fat. It provides calcium, probiotics and yeast to support digestive health.
EQ8 Senior Gut Health (Buckeye)
DigestionDigestion
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
EQ8 Senior Gut Health is a multi-textured feed formulated for geriatric horses. It provides 14% protein, 10% fat and 20% NSC. It contains calcium, prebiotics, probiotics and yeast to support digestive health.
Equalizer (Seminole)
Amino AcidAmino Acid
Competition HorsesCompetition Horses
Mineral BalanceMineral Balance
VitaminsVitamins
Seminole Equalizer is a high-protein pelleted ration balancer. It contains supplemental amino acids, a blend of organic and inorganic minerals, and added vitamins.
Equerry’s Choice (Equerry’s Horse)
DigestionDigestion
Mineral BalanceMineral Balance
ProbioticProbiotic
VitaminsVitamins
Equerry's Choice is a micro-encapsulated blend of probiotics and digestive enzymes. It also contains minerals and vitamins including organic selenium. This supplement is recommended for all horses and ponies at any work level.
Equerry’s Plus
DigestionDigestion
Mineral BalanceMineral Balance
VitaminsVitamins
YeastYeast
Equerry's Plus is a horse supplement that provides microencapsulated probiotics and digestive enzymes. This product contains live yeast culture, chelated minerals, and vitamins. Equerry's Plus is intended for all horses and ponies.
Equi-Base Grass Pellets (Uckele)
HealthHealth
MetabolismMetabolism
NutrientsNutrients
Ration BalancerRation Balancer
Equi-Base Grass Pellet is a base mineral and vitamin supplement designed to balance diets based on grass hay/forage or a 50/50 alfalfa grass forage.
Equi-Base Senior (Uckele)
HealthHealth
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
Equi-Base Senior is a powdered vitamin, mineral and amino acid supplement formulated for senior horses. It contains ingredients which can support hoof, coat, immune and digestive function.
Equi-Bone Pellets (TLC Animal Nutrition)
Bone HealthBone Health
JointsJoints
NutrientsNutrients
RecoveryRecovery
Equi-Bone by TLC Animal Nutrition is a pelleted supplement intended to support bone health in all horse types.
Equi-Bone Powder (TLC Animal Nutrition)
Bone HealthBone Health
JointsJoints
NutrientsNutrients
RecoveryRecovery
Equi-Bone Powder by TLC Animal Nutrition is a powdered supplement intended to support bone health in all horse types.
Equi-Ferm XL (Tribute)
DigestionDigestion
FatFat
Gut HealthGut Health
ProbioticProbiotic
Tribute Equi-Ferm XL is a pelleted horse supplement containing live Saccharomyces cerevisiae yeast cultures, intended to improve the digestibility of feeds.
EQUI-PRO East Coast Race (Poulin Grain)
GrainsGrains
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
EQUI-PRO East Coast Race by Poulin Grain is a textured feed intended for race horses. This feed provides high energy density from oats, beet pulp, corn, and molasses. It contains 13% protein, 8% fat, and 12% fiber.
EQUI-PRO Mare & Foal (Poulin Grain)
FoalFoal
GrowthGrowth
LactationLactation
MareMare
EQUI-PRO Mare & Foal by Poulin Grain is a textured feed intended for broodmares and growing horses. It provides 15% protein, 6% fat, and 10% fiber.
EQUI-PRO PerforMAX (Poulin Grain)
Caloric EnergyCaloric Energy
GrainsGrains
VitaminsVitamins
Weight IssuesWeight Issues
EQUI-PRO PerforMAX by Poulin Grain is a textured feed intended for performance horses requiring high energy density. It contains 12% protein, 12% fat and 12% fiber.
EQUI-PRO Premium Senior (Poulin Grain)
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
Weight IssuesWeight Issues
EQUI-PRO Premium Senior by Poulin Grain is a pelleted feed intended for senior horses with digestive issues. It provides 14% protein, 6% fat, and 18% fiber.
EQUI-PRO ProMax (Poulin Grain)
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Weight IssuesWeight Issues
EQUI-PRO ProMax by Poulin Grain is a pelleted feed formulated for performance horses and hard-keepers. It provides a higher energy density and contains 12% protein, 12% fat and 12% fiber.
Equi-Sentials (Agri Dynamics)
Amino AcidAmino Acid
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Equi-Sentials by Agri Dynamics is a premixed supplement that is meant to provide macro and micronutrients from kelp and prehistoric ocean deposits. It contains amino acid complexes, fat and water-soluble vitamin, and probiotics.
Equi-Shine (Doctors Choice Supplements)
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
Equi-Shine Pellet is a ration balancer that covers nutrient gaps in the equine diet and supports coat and hoof quality. It provides vitamins, amino acids, and a blend of organic and inorganic trace minerals.
Equi-Star (Hubbard Feeds)
Mineral BalanceMineral Balance
NutrientsNutrients
ProteinProtein
VitaminsVitamins
Equi-Star from Hubbard is a complete feed for pleasure horses at maintenance. It supplies 12% protein and 3% fat, as well as vitamins and minerals.
Equi-VM (Uckele)
HealthHealth
NutrientsNutrients
ProbioticProbiotic
Ration BalancerRation Balancer
Equi-VM is a powdered vitamin and trace mineral supplement from Uckele Health & Nutrition. It also contains probiotics and digestive enzymes.
Equibility (Hallway)
Complete FeedComplete Feed
ExerciseExercise
FatFat
FiberFiber
Equibility from Hallway is a pelleted feed fortified with Stamm 30 formulated for active adult horses. This feed uses energy from digestible fibres and vegetable oil, providing 12% protein, 8% fat, and 15% fibre.
Equidyne (Lakin Milling Company)
EnergyEnergy
GrainsGrains
NutrientsNutrients
NutritionNutrition
Equidyne from Lakin Milling Company is a pelleted horse feed formulated with alfalfa, corn, and added minerals. Equidyne Fortified Horse Pellets are intended for horses in moderate to heavy work.
Equiette (Dynavyte)
CalmingCalming
HerbHerb
PerformancePerformance
StressStress
Equiette by Dynavyte is an herbal supplement intended to reduce anxiety in horses during shoeing, training, floating, travel, etc.
Equilene Complete (Bluebonnet Feeds)
BroodmareBroodmare
Complete FeedComplete Feed
Gut HealthGut Health
PerformancePerformance
Equilene Complete from Bluebonnet is a feed that is meant to be used as a forage replacer, designed for horses at all life stages. This feed provides 10% starch, and 4% sugar.
Equilene Pelleted (Bluebonnet Feeds)
Gut HealthGut Health
Mineral BalanceMineral Balance
ProteinProtein
VitaminsVitamins
Equilene Pelleted from Bluebonnet is a feed intended for horses at all life stages, including breeding, and performance horses. This feed contains 11% starch, 5% sugars, and uses a mix of organic and inorganic trace minerals.
Equilene Pro Care (Bluebonnet Feeds)
FiberFiber
Gut HealthGut Health
Mineral BalanceMineral Balance
VitaminsVitamins
Equilene Pro Care from Bluebonnet Feeds is a beet pulp-based complete feed formulated to support digestive health. It is a low starch formula with 5.5% starch and 8% sugar. It contains added calcium, butyric acid and zinc for digestive support.
Equilene Textured (Bluebonnet Feeds)
Caloric EnergyCaloric Energy
GrainsGrains
Mineral BalanceMineral Balance
VitaminsVitamins
Equilene Textured feed from Bluebonnet Feeds is a complete feed for growth, performance, breeding and horses at maintenance. It contains molasses and vegetable oil as added sources of energy.
Equilene Track Master Ultra Fat (Bluebonnet Feeds)
Caloric EnergyCaloric Energy
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Equilene Track Master Ultra Fat from Bluebonnet Feeds is a high-energy textured feed intended for performance horses. This high-NSC feed contains 30% starch, and 11% sugars,
EquiMin Loose Mineral (Nutrena)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
EquiMin Loose Mineral is a powdered mineral and vitamin supplement intended as a top-dressing for horses on a forage-only feeding program. This powdered mineral is designed to support immune response and health and coat health.
Equine 12-8 Mineral (Tribute)
HealthHealth
Hoof HealthHoof Health
Mineral BalanceMineral Balance
NutrientsNutrients
Tribute Equine 12-8 is a vitamin/mineral supplement intended for all horses. It contains a blend of organic and inorganic mineral sources.
Equine Adult® Horse Feed (Purina Mills)
Complete FeedComplete Feed
ExerciseExercise
HealthHealth
Ration BalancerRation Balancer
Purina Equine Adult Horse Feed is a pelleted feed for horses at maintenance, light work, or broodmares in early gestation. It provides 11% crude protein, 3% fat, and 25% fiber.
Equine Aged/Adult Diet (Ace Hi Feeds)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
NutritionNutrition
SeniorSenior
Equine Aged/Adult Diet by Ace Hi Feeds is intended for mature or senior horses. It is available with or without molasses and contains added vitamins and minerals. This is a textured feed meant to be fed alongside a forage.
Equine Choice Turnout (Blue Seal)
FlavorFlavor
Mineral BalanceMineral Balance
NutrientsNutrients
ProteinProtein
Blue Seal Equine Choice Turnout is a free-choice vitamin and mineral supplement tub formulated to balance forage and grain-based diets. It contains molasses to encourage consumption and provides 12% protein.
Equine Focus (Bar Ale)
FiberFiber
MuscleMuscle
NutrientsNutrients
YeastYeast
Equine Focus from Bar Ale is intended to be fed to horses and ponies of all ages and work levels. Equine Focus contains beet pulp and soybean meal. Equine Focus total NSC content is 21%.
Equine Generator (Biovet)
Competition HorsesCompetition Horses
DigestionDigestion
NutritionNutrition
YeastYeast
Equine Generator from Biovet is a microbial supplement formulated for horses. Equine Generator contains kelp, biotin, and live yeast. Equine Generator is intended for performance horses.
Equine Junior® Complete Horse Supplement (Purina Mills)
Complete FeedComplete Feed
FatFat
FoalFoal
GrowthGrowth
Purina Equine Junior Horse Feed is a pelleted feed for growing horses that have been weaned. It provides protein, calories, vitamins and minerals to support development.
Equine Restart (Equi-lete)
Gut HealthGut Health
HealthHealth
ImmunityImmunity
StressStress
Equine Restart by Equi-lete is a microbial supplement intended to support the gastrointestinal tract and overall immune health in all horse types.
Equine Senior Active (Purina)
EnergyEnergy
ExerciseExercise
Gut HealthGut Health
SeniorSenior
Purina® Equine Senior® Active is a concentrate horse feed containing pelleted and extruded components. It provides 14% fibre and 10% fat content.
Equine Senior® Complete Horse Feed (Purina Mills)
Complete FeedComplete Feed
DentalDental
ImmunityImmunity
SeniorSenior
Purina Equine Senior is a complete feed in an easy-to-chew formulation targeted at older horses. It contains 14% crude protein, 5.5% fat, and 19% NSC.
Equine Super Diet (Equistro – Vetoquinol)
AntioxidantAntioxidant
FlavorFlavor
Mineral BalanceMineral Balance
VitaminsVitamins
Equistro Equine Super Diet is a low feeding rate mineral and vitamin supplement formulated in an alfalfa pellet with apple flavouring.
Equistages (DuMor)
HealthHealth
NutrientsNutrients
NutritionNutrition
ProbioticProbiotic
Equistages by DuMor is a pelleted feed intended to support overall health in all horse types.
EquiZyme (Bio-Nutrition Laboratories)
HealthHealth
Mineral BalanceMineral Balance
PrebioticPrebiotic
VitaminsVitamins
EquiZyme from Bio-Nutrition Laboratories is a vitamin-mineral supplement. This supplement contains added manno-oligosaccharides, selenium and yeast cultures intended for horses in various performance levels.
Essential (DePaolo Equine Concepts)
Amino AcidAmino Acid
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Essential by DePaolo Equine Concepts is a pelleted supplement that intends to promote healthy coat and hooves, and support a strong immune system. It contains ingredients such as L-Lysine, Biotin, and Vitamins A, B, D, and E.
Essential K (Tribute)
Amino AcidAmino Acid
HealthHealth
Ration BalancerRation Balancer
VitaminsVitamins
Tribute Essential K is a ration balancer with a low 12.5% NSC (sugar plus starch). Essential K provides a mix of organic and inorganic trace minerals, including organic selenium yeast.
Essential K GC Plus (Tribute)
JointsJoints
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Ration BalancerRation Balancer
Tribute Essential K GC Plus is a lower-inclusion ration balancer formulated with glucosamine, chondroitin sulfate, and MSM meant to support joint health.
Essential K Rebuild (Tribute)
Low NSC FeedsLow NSC Feeds
PerformancePerformance
Ration BalancerRation Balancer
RecoveryRecovery
Essential K Rebuild by Tribute is a low-starch, low-sugar pelleted ration balancer formulated for performance horses. Different from Essential K, it has added chromium and turmeric.
Essential K w/ Fly Control (Tribute)
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
Ration BalancerRation Balancer
VitaminsVitamins
Tribute Essential K with Fly Control is a low feeding-rate ration balancer with Diflubenzuron, which can regulate the emergence of common flies.
Essentials Free Choice Mineral (Bluebonnet Feeds)
ElectrolyteElectrolyte
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Essentials Free Choice Mineral by Bluebonnet Feeds is a free-choice mineral in granule form. It is intended to support overall health in horses on pasture or hay-based diets.
Esteem Complete Pellet (Bar Ale)
ExerciseExercise
FiberFiber
NutritionNutrition
VitaminsVitamins
Esteem Complete Pellet is a high fiber feed. It is intended for horses and ponies of all ages and work levels. It contains 13% protein, 3.2% fat, and 23% fiber.

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