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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
Velocity (Ark Nutrition)
Complete FeedComplete Feed
ExerciseExercise
NutritionNutrition
ProteinProtein
Velocity by Ark Nutrition is a pelleted feed intended for horses in moderate to heavy work. It contains a blend of essential amino acids and fatty acids meant to support muscle development and improve muscle recovery.
Victoria Racer’s Edge (Thomas Moore Feed)
EnergyEnergy
FatFat
NutrientsNutrients
PerformancePerformance
Victoria Racer's Edge from Thomas Moore Feed is a performance feed that is high in energy and is meant to be fed alongside forage. It contains vitamins and minerals and is intended to support body condition.
Victory! (Seminole)
FatFat
Feed EfficiencyFeed Efficiency
PerformancePerformance
StaminaStamina
Seminole Victory!™ is a beet pulp-based textured feed containing oats, barley and stabilized rice bran. It contains 29% NSC and is targetted to mature performance horses.
Vintage Mare & Foal (Blue Seal) – [Discontinued]
Complete FeedComplete Feed
FoalFoal
GrowthGrowth
LactationLactation
Vintage Mare & Foal by Blue Seal is a now-discontinued feed which was a high-protein, high-energy extruded feed targeted to broodmares during pregnancy and lactation, as well as growing horses. It contained grains such as oats, corn, and barley, as well as soybean and alfalfa meal.
Vita Plus (Farnam)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Farnam Vita Plus is a pelleted vitamin and mineral supplement for horses. It is designed to provide organic and inorganic trace minerals.
Vitalize Equine Free Choice (BioZyme)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Vitalize Equine Free Choice by BioZyme is a vitamin and mineral supplement that supports digestion, nutrient absorption, and hindgut support. This feed additive is for horses on pasture and includes a prebiotic that aids with digestion.
Vitalize Equine High Performance (Biozyme)
Gut HealthGut Health
Mineral BalanceMineral Balance
PrebioticPrebiotic
VitaminsVitamins
Vitalize Equine High Performance by Biozyme is a pelleted supplement containing vitamins and minerals, it is intended for performance horses.
Vitalize Equine Protein Pellet (BioZyme)
BroodmareBroodmare
GrowthGrowth
ProteinProtein
SeniorSenior
Vitalize Equine Protein Pellet by Biozyme is a protein supplement intended for growing, breeding, senior and performance horses.
Vitalize Equine Vitamin & Mineral Supplement (Biozyme)
DigestionDigestion
Mineral BalanceMineral Balance
PrebioticPrebiotic
VitaminsVitamins
Vitalize Equine Vitamin and Mineral Supplement by Biozyme is a powdered vitamin and mineral supplement intended to support nutritional and digestive health in horses.
Vitamin Gold (Dumor)
ImmunityImmunity
Mineral BalanceMineral Balance
VitaminsVitamins
YeastYeast
DuMOR Vitamin Gold is a pelleted mineral and vitamin supplement intended for all classes of horses and ponies. It is formulated to supplement diets containing poor quality forage.
VitAmino (Cavalor)
Amino AcidAmino Acid
MuscleMuscle
PerformancePerformance
ProteinProtein
VitAmino by Cavalor is a pelleted protein balancer intended to help build muscle mass in horses.
Vitamor Performance Supplement for Multi-Species (DuMor)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Vitamor by DuMor is a multi-species performance supplement providing support for growth, energy, coat health, and overall digestion. Vitamor is a source of protein and energy for equine diets.
Vitatude (Hestevard)
HealthHealth
ImmunityImmunity
Mineral BalanceMineral Balance
VitaminsVitamins
Vitatude by Hestevard is a liquid vitamin and mineral supplement intended to promote overall health in all horses and pony types.
Vitatude +Protein (Hestevard)
HealthHealth
MuscleMuscle
ProteinProtein
VitaminsVitamins
Vitatude +Protein by Hestevard is a multivitamin and protein supplement intended to help build muscle and support muscle function.
Vitatude Senior (Hestevard)
HealthHealth
ImmunityImmunity
NutrientsNutrients
SeniorSenior
Vitatude Senior by Hestevard is a liquid mineral and vitamin supplement intended to support overall health in senior horses and ponies.
WB100 (McCauley’s Equine Formulas)
Caloric EnergyCaloric Energy
ExerciseExercise
PerformancePerformance
Ration BalancerRation Balancer
WB100 is a high-energy pelleted feed for performance horses that contains vegetable oil as a source of added fat. It provides additional calories without excessive protein. It was also designed to support gut health.
Wellness Calm and Cool® (Seminole)
Complete FeedComplete Feed
FiberFiber
HerbHerb
Low NSC FeedsLow NSC Feeds
Wellness Calm and Cool® is a textured feed designed for easy keepers and ponies. It provides high levels of digestible fibre, and contains 3% fat and 21% NSC.
Wellness Compete Safe (Seminole) – [Discontinued]
Complete FeedComplete Feed
Competition HorsesCompetition Horses
ExerciseExercise
Low NSC FeedsLow NSC Feeds
Seminole Wellness Compete Safe is a now-discontinued textured horse feed targeted to active horses. It was advertised as a low-starch, high-fat feed with added herbs and stabilized rice bran.
Wellness DynaSport (Seminole)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
EnergyEnergy
FatFat
Wellness DynaSport™ is a textured feed with 14% fat to meet the high energy needs of equine athletes. It contains 15% NSC (sugar and starch). This feeds supports the performance and recovery of performance horses.
Wellness Equi-Safe (Seminole)
Complete FeedComplete Feed
FiberFiber
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Wellness Equi-Safe® is a low-calorie complete feed for adult horses and ponies with metabolic concerns. This molasses-free feed is composed of long-stemmed fiber from low-starch grasses.
Wellness Grow Right (Seminole)
Complete FeedComplete Feed
FoalFoal
GrowthGrowth
LactationLactation
Wellness Grow Right® is a textured feed targeted to horses of all life stages. It is composed of digestible fiber sources such as soyhulls and beet pulp. It contains added vitamins, organic and inorganic trace minerals, and probiotics.
Wellness Herbal Blend (Seminole)
Complete FeedComplete Feed
HerbHerb
Mineral BalanceMineral Balance
VitaminsVitamins
Wellness Herbal Blend is a textured feed providing 8% fat, 12% protein and 19% NSC. It contains nine added herbs, including garlic, spearmint, parsley, red clover, rosemary, and fenugreek.
Wellness Safe & Lite (Seminole)
Complete FeedComplete Feed
Easy KeeperEasy Keeper
FiberFiber
Low NSC FeedsLow NSC Feeds
Wellness Safe & Lite® is a pelleted feed for adult horses and easy keepers. This low-fat feed contains 15% NSC (12% starch, 3% sugars).
Wellness Senior Mix (Seminole)
Complete FeedComplete Feed
HerbHerb
SeniorSenior
Weight IssuesWeight Issues
Wellness Senior Mix® is a textured, easy-to-chew complete feed. It provides 18% NSC and 10% fat to support body condition maintenance.
Wellness Show & Sport (Seminole)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
PerformancePerformance
StaminaStamina
Wellness Show & Sport® is a high-fat multi-textured feed formulated to meet the higher energy and calorie requirements of performance, endurance, and show horses.
Wellness SportHorse (Seminole)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
FatFat
FiberFiber
Wellness SportHorse is a textured feed intended for performance horses at any life stage. It provides higher calorie density with 10% fat, 14% protein, 16% fiber, and 19% NSC.
WellSolve Well-Gel (Purina Mills)
HealthHealth
Mineral BalanceMineral Balance
ProteinProtein
VitaminsVitamins
WellSolve Well-Gel from Purina Mills is a concentrated source of protein, vitamins and minerals for horses. WellSolve Well-Gel is intended to support overall equine health.
Whoa (Doctor’s Choice Supplements)
CalmingCalming
Mineral BalanceMineral Balance
StressStress
VitaminsVitamins
Whoa by Doctor's Choice Supplements is a supplement intended for horses with limited exercise programs or on box rest. It is designed to help with a horse's focus and attitude.
Wholegain (Cavalor)
Coat QualityCoat Quality
EnergyEnergy
Ration BalancerRation Balancer
Weight IssuesWeight Issues
Cavalor's Wholegain is a balancer that is meant to provide cool energy, weight gain, and coat support. It contains vitamins, minerals, and omegas 3 and 6.
Wholesome Blends Balancer (Tribute)
Gut HealthGut Health
HealthHealth
Low NSC FeedsLow NSC Feeds
Ration BalancerRation Balancer
Wholesome Blends Balancer is a soy-free ration balancer with 28% protein, 5% fat and less than 15% NSC. It is formulated with canola, flax, alfalfa, and sunflower meals as well as split peas for protein.
Wholesome Blends Performance (Tribute)
Complete FeedComplete Feed
EnergyEnergy
FatFat
PerformancePerformance
Wholesome Blend Performance is a performance horse feed with higher levels of fat and protein. It is a textured feed using a variety of energy, fat and protein sources, both alternative and conventional.
Wholesome Blends Senior (Tribute)
Complete FeedComplete Feed
DigestionDigestion
FiberFiber
SeniorSenior
Wholesome Blends Senior is a soy-free high-fat and high-fiber textured complete feed for senior horses. It contains beet pulp, alfalfa meal, flaxseed meal, split peas, and canola oil.
Winning Touch E-Z Hoof (Blue Seal) – [Discontinued]
BroodmareBroodmare
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Winning Touch E-Z Hoof is a pelleted hoof supplement providing 20 mg/LB of biotin as well as Vitamin E, selenium, chelated manganese, zinc, and copper.
Winning Touch Mixed Hay Min-A-Vite (Blue Seal) – [Discontinued]
HealthHealth
MetabolismMetabolism
Ration BalancerRation Balancer
VitaminsVitamins
Winning Touch Mixed Hay Min-A-Vite is a now discontinued concentrated, granular mineral and vitamin supplement intended for horses fed mixed grass/legume hay or pasture. It is meant for horses on a low grain ration.
Woody’s Complete Pellet Feed (Woody’s Horse Nutrition)
Complete FeedComplete Feed
FatFat
FiberFiber
Grain FreeGrain Free
Woody’s Complete is a pelleted feed intended for the majority of adult horses. It is composed of beet pulp, soybeans, alfalfa meal and rice bran and contains added probiotics and chelated trace minerals.
Woody’s Race (Woody’s Horse Nutrition)
Competition HorsesCompetition Horses
EnergyEnergy
PerformancePerformance
RecoveryRecovery
Woody’s Race is a complete feed intended to supply high energy density to horses in moderate to intense work. It is made primarily of oats and corn and contains 11.5% protein and 5% fat.
Wrangler (BUCKEYE Nutrition)-[Discontinued]
DentalDental
Feed EfficiencyFeed Efficiency
Ration BalancerRation Balancer
SeniorSenior
Wrangler is a now-discontinued pelleted horse feed from Buckeye Nutrition. This complete feed was designed for horses with poor teeth or limited access to forage.
Xcelerace (Seminole)
ExerciseExercise
FatFat
FiberFiber
PerformancePerformance
Seminole Xcelerace is a textured feed for performance horses providing 8% fat and 26% NSC. Energy sources include oats, beet pulp, cracked corn, soybeans and cane molasses.
ZenA-Min Vitamin Mineral Supplement
Hoof HealthHoof Health
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
ZenA-min is an equine vitamin and mineral supplement formulated with trace minerals, kelp, vitamins, enzymes, and anti-oxidants. This feed is recommended for seniors and adult horses under stress or a heavy workload.
Zero (Hygain)
Complete FeedComplete Feed
FiberFiber
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Zero by Hygain is a low starch and sugar feed designed for horses with metabolic disease or sensitivity to sugars. It is formulated with 15% protein, 4% fat and 35% fibre. It contains both organic and inorganic minerals as well as yeast.
Zesterra Lick Tub (Pro Earth Animal Health)
Gut HealthGut Health
Mineral BalanceMineral Balance
UlcersUlcers
VitaminsVitamins
Zesterra Lick Tub by Pro Earth Animal Health is a supplement containing Zesterra, as well as added vitamins and minerals. It is intended for horses prone to stress.
Zone (Banks Mill Feeds)
Mineral BalanceMineral Balance
ProteinProtein
Ration BalancerRation Balancer
VitaminsVitamins
Zone by Banks Mill Feeds is a pelleted ration balancer that is intended to be used to add protein, vitamins, and minerals to the equine diet. It is meant for growing, breeding, and performance horses as well as easy keepers.

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