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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
Esteem Complete Senior Pellet (Bar Ale)
FiberFiber
NutritionNutrition
SeniorSenior
VitaminsVitamins
Esteem Complete Senior Pellet is a pelleted feed intended for senior horses and ponies. Esteem Complete Senior Pellet is formulated with glucosamine and chondroitin.
Esteem Complete Senior Textured (Bar Ale)
Gut HealthGut Health
NutritionNutrition
SeniorSenior
YeastYeast
Esteem Complete Senior Textured from Bar Ale is intended for senior horses. Esteem Complete Senior Textured is a textured horse feed formulated with beet pulp and alfalfa meal.
Estrella (Lakin Milling Company)
EnergyEnergy
FiberFiber
IngredientIngredient
NutrientsNutrients
Estrella from Lakin Milling Company is a pure alfalfa pellet with added mineral supplementation. Estrella Horse Pellets is intended for horses in all levels of work.
Exacta 10 (Seminole)
FiberFiber
FlavorFlavor
Gut HealthGut Health
Organic Trace MineralsOrganic Trace Minerals
Seminole Exacta 10 is a textured feed intended for mature, active horses and ponies, providing 22% NSC. It contains soybeans, wheat middlings, oats, cracked corn, and molasses.
Exacta 12 (Seminole)
FiberFiber
FlavorFlavor
Gut HealthGut Health
Organic Trace MineralsOrganic Trace Minerals
Seminole Exacta 12 is a textured feed intended for active adult horses, providing 12% protein, 7% fat and 22% NSC. It contains soybeans, wheat middlings, oats, cracked corn, and molasses.
Exacta 14 (Seminole)
FiberFiber
FlavorFlavor
Gut HealthGut Health
Organic Trace MineralsOrganic Trace Minerals
Seminole Exacta 14 is a textured feed intended for growing, breeding, and performance horses. It provides 23% NSC and contains soybeans, wheat middlings, oats, cracked corn, and molasses.
Excel Equine 10 (Excel Equine Feeds)
Easy KeeperEasy Keeper
HealthHealth
ImmunityImmunity
SeniorSenior
Excel Equine 10 is a textured feed from Excel Equine Feeds. This feed is intended for horses in low to moderate work, as well as mature horses.
Excel Equine 12 (Excel Equine Feeds)
FatFat
HealthHealth
ImmunityImmunity
PerformancePerformance
Excel Equine 12 is a textured feed from Excel Equine Feeds. Excel Equine 12 contains a fat content intended for horses in moderate workloads.
Excel Equine 15 (Excel Equine Feeds)
BroodmareBroodmare
GrowthGrowth
NutritionNutrition
PerformancePerformance
Excel Equine 15 by Excel Equine Feeds is a textured feed intended for broodmares, foals, weanlings, yearlings and high performance horses.
EZ (Tribute)
CalmingCalming
ExerciseExercise
FatFat
FiberFiber
Tribute Equine EZ Pellets is a 20% fibre, 8% fat feed intended for hard keepers and mature horses with higher energy requirements. It is formulated with reduced sugar and starch content and provides a maximum 13.5% NSC.
Fab Fiber Plus (McCauley’s)
FiberFiber
HealthHealth
NutrientsNutrients
PerformancePerformance
Fab Fiber Plus from McCauley's is a textured feed intended for performance horses. It contains 17% fiber, 12% fat, and 12% protein.
Farrier’s Choice (Advanced Biological Concepts)
DigestionDigestion
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Farrier's Choice from Advanced Biological Concepts is a pelleted vitamin and mineral supplement. This supplement can contribute to proper digestion and hoof health and growth.
Ferto-LAC3 Mare Pellets (Havens Horsefeed)
Amino AcidAmino Acid
BroodmareBroodmare
FoalFoal
GrowthGrowth
Ferto-LAC3 Mare Pellets is a high-energy equine feed for broodmares and foals. It contains added calcium, phosphorus, and magnesium to support development and milk production.
Fiber Boost (Ark Nutrition)
FiberFiber
Low NSC FeedsLow NSC Feeds
Mineral BalanceMineral Balance
VitaminsVitamins
Ark Nutrition Fiber Boost is a concentrated fiber source with added vitamins and minerals. It has low sugar and starch content, suitable for metabolic horses.
Fiber First (Excel Equine Feeds)
FatFat
FiberFiber
HealthHealth
NutritionNutrition
Fiber First from Excel Equine Feeds is a textured feed. This feed is intended to be high fat and high fat, with an increased beet pulp content.
Fibre O Plus (Brooks Feeds)
ExerciseExercise
FatFat
FiberFiber
Omega 3-6-9Omega 3-6-9
Fibre O Plus is a textured performance feed for horses with higher energy demands. It provides added calories from beet pulp and fat sources such as flax and rice bran.
Fibre-Lite Forage Replacer (Brooks)
Easy KeeperEasy Keeper
FiberFiber
Hay StretcherHay Stretcher
SeniorSenior
Fibre-Lite Forage Replacer is a pelleted feed containing 25% fibre from digestible sources such as soy hulls, wheat shorts, alfalfa meal, and beet pulp. It can be used as a partial hay replacer or for horses with lower energy requirements.
Fibrenergy (Hallway Feeds)
Competition HorsesCompetition Horses
FiberFiber
Grain FreeGrain Free
Low NSC FeedsLow NSC Feeds
Hallway Fibrenergy is a high-fat, high-fibre textured feed designed for performance horses. Fibrenergy is grain-free and uses beet pulp, soy hulls and oils for energy.
Finger Lakes 12:7 (Poulin Grain)
Complete FeedComplete Feed
GrainsGrains
PerformancePerformance
ProteinProtein
Finger Lakes 12:7 by Poulin Grain is a textured feed intended for race horses. It contains corn, oats, and vitamin and mineral pellets. It supplies 12% crude protein, 7% fat, and 8% fiber.
Finisher 14 (McCauley’s Equine Formulas)
Coat QualityCoat Quality
FatFat
FoalFoal
Weight IssuesWeight Issues
Finisher 14™ is a textured feed designed for performance horses and preparing sale horses. It provides high levels of vegetable oil and beet pulp to promote a healthy coat appearance.
Fire-Fighter Non-GMO (Daily Dose Equine)
Easy KeeperEasy Keeper
HealthHealth
NutrientsNutrients
Weight IssuesWeight Issues
Fire-Fighter Non-GMO by Daily Dose Equine is a low NSC (10%) forage balancer intended for picky eaters needing to lose weight and horses with sensitive stomachs.
Fit & Fibre – Pelleted (Brooks Feeds)
Complete FeedComplete Feed
FatFat
FiberFiber
NutritionNutrition
Fit and Fibre is a high fat and fibre pelleted feed from Brooks Performance Horse Feeds. It contains a minimum of 6.50% fat and a maximum of 20% fibre with an NSC of 32.4% determined by independent testing. It is listed as a controlled NSC feed.
Fit & Fibre – Textured (Brooks Feeds)
Complete FeedComplete Feed
FatFat
FiberFiber
NutritionNutrition
Fit and Fibre is a high-fat and fibre textured feed from Brooks Performance Horse Feeds. This feed is meant to provide energy for horses in light to moderate work.
Foal & Weanling (McCauley’s Equine Formulas)
FoalFoal
GrowthGrowth
Gut HealthGut Health
HealthHealth
McCauley's Foal & Weanling is a pelleted feed for foals and growing horses. It is formulated to support gut development and to help transition foals from milk to feed.
Foal Balancer Milk Pellets (Seminole)
FoalFoal
GrowthGrowth
ProbioticProbiotic
YeastYeast
Seminole Foal Balancer Milk Pellets is a milk replacer and creep feed intended for nursing and orphan foals. It can also be fed to lactating mares and performance horses. This feed contains probiotic and yeast culture.
Foal Foundation (Tribute Equine)
FoalFoal
GrowthGrowth
PrebioticPrebiotic
ProbioticProbiotic
Tribute Foal Foundation™ is a milk-based pellet for foals up to three months of age to supplement the nutrients provided in mare's milk. The smaller pellet size helps to transition the foal to solid feeds.
Foal Starter (Buckeye)
EnergyEnergy
FoalFoal
PrebioticPrebiotic
ProteinProtein
Buckeye Foal Starter is a milk-based pellet that can be used as a free-choice transition or creep feed for foals under three months of age. It provides digestible fibre and protein sources.
Foal-Aide Paste (Buckeye)
FoalFoal
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Foal-Aide Paste by Buckeye is a paste supplement intended for foals and growing horses that contains minerals, vitamins, and antioxidants to support energy metabolism and growth.
ForagE+ Performance Horse Feed (Forage Horse Feed)
FiberFiber
ForageForage
Hay StretcherHay Stretcher
Mineral BalanceMineral Balance
ForagE+ is a high fibre feed that can serve as the sole forage source in mature horse diets. It contains alfalfa meal, beet pulp, and flax as the primary fibre sources.
Formula 2 Equine Supplement (Dr. Reeds) – [Discontinued]
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Dr. Reeds Formula 2 is a now-discontinued vitamin/mineral supplement for horses with higher NSC content than Formula 1. This supplement used a combination of organic and inorganic trace minerals and contained wheat and molasses.
Fortifiant Liberte (Nature Belisle)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Fortifiant Liberte by Nature Belisle is a pelleted vitamin and mineral supplement. It is intended for horses and ponies of all ages and work levels.
Fortify (Excel Equine Feeds)
FiberFiber
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
Fortify from Excel Equine Feeds is a textured feed intended for horses in all stages of life. This feed contains 13% protein and 8% fat. Fortify is intended for horses in any level of work.
Freestyle Performance (Daily Dose Equine)
Caloric EnergyCaloric Energy
FatFat
FiberFiber
PerformancePerformance
Freestyle Performance by Daily Dose Equine is a textured feed that is higher in fat and fibre than Sweet ‘n Safe. It is intended for performance horses. It is also known as Trail Mix.
Full Stride (Pureform)
Hoof HealthHoof Health
JointsJoints
SeniorSenior
Skin + HairSkin + Hair
Pureform Full Stride is a joint and bone supplement for horses containing MSM, Glucosamine, DMG, amino acids, vitamins and minerals. The formula is advertised to maintain cartilage, tendons, muscle, skin, hair and hooves.
Futurity Blend 14 (Woody’s Feed)
BroodmareBroodmare
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
LactationLactation
Woody's Futurity Blend 14 is a high starch feed with 14% protein and 4.5% fat, targeted to broodmares and foals. It is formulated to support gestation, lactation and growth.
Gastro Plus (Havens Horsefeed)
Amino AcidAmino Acid
Gut HealthGut Health
Mineral BalanceMineral Balance
VitaminsVitamins
Gastro Plus by Havens Horsefeed is a gut health supplement for all horses and ponies at all work levels. It contains alfalfa and a blend of buffers intended to neutralize stomach acid.
Genesis (Brooks)
BroodmareBroodmare
HealthHealth
NutrientsNutrients
VitaminsVitamins
Genesis by Brooks is a broodmare feed available in either textured or pelleted form. It is designed to meet the enhanced nutritional needs of mares before and after foaling, and it is marketed as having a low glycemic index.
Gentle Balance (LMF Horse Feeds)
Grain FreeGrain Free
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
YeastYeast
Gentle Balance is a pelleted feed for horses that contains energy, vitamins, minerals, and yeast but does not contain grain or molasses. It is a low sugar feed that is meant for horses in light to moderate exercise.
Get Go (Elk Grove Milling) [Discontinued]
Bone HealthBone Health
BroodmareBroodmare
FoalFoal
GrowthGrowth
Get Go by Elk Grove Milling is a pelleted complete feed intended for broodmares, foals and weanlings up to 18 months.
GI (Platinum Performance)
DigestionDigestion
Gut HealthGut Health
ImmunityImmunity
PrebioticPrebiotic
Platinum Performance GI is a gut health supplement for mature horses. It is formulated with flax seed, probiotics, prebiotics, glutamine and other amino acids, toxin binders, vitamins and minerals.
GI Health (Doctor’s Choice Supplements)
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
VitaminsVitamins
GI Health is a pre/probiotic supplement intended for horses subjected to stressful situations such as travelling and competition. It intends to promote gut function.
GI Intensive Care (Bluebonnet Feeds)
DigestionDigestion
Gut HealthGut Health
HealthHealth
NutritionNutrition
GI Intensive Care by Bluebonnet Feeds is a powdered supplement intended to provide digestive support for horses undergoing stress, changes in diet, environment or schedule.
Gold Chance 10 (Seminole) – [Discontinued]
Complete FeedComplete Feed
ExerciseExercise
HealthHealth
PerformancePerformance
Seminole Gold Chance 10 is a now-discontinued horse feed that provided 10% crude protein, 6% fat and 9% fiber in a pelleted format.
Gold Chance 12+ (Seminole) – [Discontinued]
Complete FeedComplete Feed
ExerciseExercise
GrowthGrowth
ProteinProtein
Seminole Gold Chance 12+ is a now-discontinued horse feed that provided 12% crude protein with added lysine to support growth and performance.
Golden Age – Senior Horse Ration (Kelley’s Feed)
Caloric EnergyCaloric Energy
FiberFiber
NutritionNutrition
SeniorSenior
Kelley's Golden Age Senior is a pelleted feed containing fine ground alfalfa hay and pre-cooked extruded grain nuggets for mature and aged horses. It provides 14% protein, as well as added vitamins and minerals.
Good n Sound (West Feeds, Inc)
Complete FeedComplete Feed
DigestionDigestion
Grain FreeGrain Free
NutritionNutrition
Good n Sound is a pelleted equine feed that contains 14% protein and 7% fat. It is intended for senior horses, hard keepers, and horses with sensitive stomachs.
Grade A Ultra 24 Milk Replacer (Sav-A-Caf)
FoalFoal
GrowthGrowth
NutritionNutrition
ProteinProtein
Ultra 24 by Sav-a-Caf is a multi-species milk replacer that can be given to foals and calves. It contains 24% fat and 24% protein from milk to support digestion and growth.
Grand Vite (Grand Meadows)
HealthHealth
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
ProteinProtein
Grand Vite by Grand Meadows is an equine digestive supplement targeted for all horse types. It contains vitamins, trace minerals, and Dried Saccharomyces Cerevisiae Postbiotic Fermentation Product at an undisclosed amount.
Grass Advantage (ProElite)
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
ProElite Grass Advantage is a pelleted ration balancer intended to balance grass and mixed forages. It can be fed to broodmares, growing, performance, and maintenance horses.
Grass Plus Vitamin & Mineral Block (BUCKEYE Nutrition)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Buckeye Grass Plus® Mineral & Vitamin Block is a free-choice mineral supplement intended for horses consuming grass forage. It contains inorganic minerals including calcium, phosphorus, magnesium and potassium.

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