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Ascorbic Acid (Vitamin C Supplement) - Feed Ingredient

Ascorbic acid, commonly known as vitamin C, is a water-soluble vitamin that plays a crucial role in antioxidant defense, collagen synthesis, and immune function. Unlike humans, horses can produce vitamin C in their liver from glucose, reducing their dependence on dietary sources.

However, in certain situations—such as high stress, illness, aging, or intense exercise—horses may benefit from supplemental ascorbic acid to support immune function and tissue repair. Because ascorbic acid is sensitive to heat, light, and oxidation, stabilized forms, such as L-ascorbyl-2-polyphosphate, are often used in feed to ensure potency.

The following equine feeds, supplements and products contain Ascorbic Acid (Vitamin C Supplement) as an ingredient.

Feeds, Supplements & Products
Omneity P – Pellets – Vitamin & Mineral Supplement (Mad Barn)
Gut HealthGut Health
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
Ration BalancerRation Balancer
Omneity Pellets is a balanced mineral and vitamin supplement for horses in a palatable pellet form. It provides 100% organic trace minerals, complete B-vitamin fortification, added Vitamin E, yeast and digestive enzymes.
Omneity Premix – Vitamin & Mineral Supplement (Mad Barn)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Omneity Premix is a balanced mineral and vitamin supplement for horses providing 100% organic trace minerals, complete B-vitamin fortification, added Vitamin E, yeast, and digestive enzymes.
Performance XL: Electrolytes (Mad Barn)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
PerformancePerformance
StaminaStamina
Performance XL: Electrolytes by Mad Barn is a scientifically formulated equine electrolyte supplement designed to support athletic performance and workout recovery. It contains an ideal blend of natural minerals and vitamins to promote hydration status and muscle function.
1:1 Free Choice (Dynamite)
HealthHealth
ImmunityImmunity
Mineral BalanceMineral Balance
VitaminsVitamins
1:1 Free Choice from Dynamite is a free choice vitamin and mineral supplement for horses. This supplement contains a ration of one part calcium to one part phosphorus, intended for horses consuming legume hay.
101 Diet Balancer (Stride Animal Health)
Amino AcidAmino Acid
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
VitaminsVitamins
101 Diet Balancer is a vitamin and mineral supplement intended to balance forage- and grain-based diets. This concentrated supplement has a lower NSC content and contains organic trace minerals, yeast, and digestive enzymes.
12.5% Exactor Lite – Texturized (Masterfeeds)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Masterfeeds 12.5% Exactor Lite is a texturized horse feed formulated for race horses. It is marketed as a palatable corn-free formula with added fiber, shredded beet pulp and molasses. This feed features 100% organic trace minerals.
12% Pleasure Horse (Sweet Country Feeds)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
GrainsGrains
NutritionNutrition
Sweet Country 12% Pleasure Horse is a textured feed intended for mature horses. It provides 12% crude protein in a grain-based formula containing corn, oats, wheat middlings and soybean meal.
12% Select Horse (Sweet Country Feeds)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
Organic Trace MineralsOrganic Trace Minerals
12% Select Horse by Sweet Country Feeds is a grain-based feed that provides 12% protein and 4% fat. It contains added vitamins, as well as inorganic and organic trace minerals.
13% NRG Multi-Particle (Masterfeeds)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
NutritionNutrition
PerformancePerformance
Masterfeeds 13% NRG is a multi-particle feed containing oil-coated pellets and extruded components. It provides higher calorie density intended for working horses with additional energy requirements. It is designed for horses in intense work.
14% Equine Developer Pellet (Masterfeeds)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Masterfeeds 14% Developer is a pelleted equine feed intended for pregnant and lactating mares as well as yearlings. It is designed to support healthy development and contains 100% organic trace minerals.
14% Performance (Running Horse)
Complete FeedComplete Feed
GrowthGrowth
LactationLactation
PerformancePerformance
Running Horse Performance is a texturized 14% protein and 6% fat feed formulated for performance, breeding and growing horses. It provides a higher energy density for equine athletes.
14% Performance Formula (Triple Crown) – [Discontinued]
ExerciseExercise
FlavorFlavor
PerformancePerformance
Weight IssuesWeight Issues
Triple Crown 14% Racing Formula is a discontinued feed which was a high-fat, high-energy feed containing a blend of grains and fat sources. It was designed for young performance horses, broodmares, breeding stallions, yearlings and weanlings.
14% Racing Formula (Triple Crown)-[Discontinued]
EnergyEnergy
ExerciseExercise
NutritionNutrition
PerformancePerformance
Triple Crown 14% Racing Formula is a high calorie textured feed containing a blend of grains with soybean meal and molasses. It is intended for young performance horses, broodmares, breeding stallions and growing foals.
14% Senior Textured (Tribute)
Complete FeedComplete Feed
FatFat
NutritionNutrition
SeniorSenior
Tribute 14% Senior Textured is a complete feed for mature horses composed of steam-rolled oats, barley, dried beet pulp, extruded whole soybeans, and dehydrated alfalfa meal.
3 Wire Horse (Hay & Grain) Pellets (Kelley’s Feed)
FiberFiber
ForageForage
FlavorFlavor
NutritionNutrition
Kelley's 3 Wire Horse is an alfalfa-based pelleted feed with ground grain as well as added molasses, vitamins, and minerals. This hay and grain pellet contains 12.5% protein and 1.5% fat.
30% Ration Balancer (Equine Advantage)
Omega 3-6-9Omega 3-6-9
ProteinProtein
Ration BalancerRation Balancer
VitaminsVitamins
30% Ration Balancer is intended to be fed alongside pasture or hay. It contains essential nutrients to support normal gut health, healthy hooves and coats.
4-In-1 (Meal) (MVP)
Coat QualityCoat Quality
DigestionDigestion
Hoof HealthHoof Health
JointsJoints
4-In-1 by MVP is a premixed supplement for horses to that intends to support joint function, hoof growth, hair coat and digestive function. It contains glucosamine, chondroitin sulphate, biotin, omega 3 & 6, and probiotics.
4-In-1 H/A Joint Supplement (MVP)
Coat QualityCoat Quality
DigestionDigestion
Hoof HealthHoof Health
JointsJoints
4-In-1 H/A Joint Supplement by MVP is a pelleted supplement that combines vitamins, minerals, and probiotics. It intends to support joint function, hoof growth, hair coat, and digestive system.
5-In-1 H/A (MVP)
Coat QualityCoat Quality
DigestionDigestion
Hoof HealthHoof Health
JointsJoints
5-In-1 H/A by MVP is a pelleted supplement for horses that intends to help support joint function. It is palatable with apple flavouring and contains glucosamine, hyaluronic acid, chondroitin sulphate, and MSM.
ABC’s Fortified G. R. P. (Advanced Biological Concepts)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
ABC's Fortified G.R.P. by Advanced Biological Concepts is a supplement intended for horses and ponies of all ages and work levels. It contains 10% protein, 3% fat, and 17% fibre.
ABC’s Fortified Equine Supplement (Advanced Biological Concepts)
HealthHealth
Mineral BalanceMineral Balance
ProbioticProbiotic
VitaminsVitamins
ABC's Fortified Equine Supplement is a pelleted supplement that intends to be fed as a ration balancer for all life stages of horses. It contains vitamins, minerals, and probiotics for nutrient absorption.
ABC’s Rush Creek 1:1 Mineral (Advanced Biological Concepts)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
ABC's Rush Creek 1:1 Mineral by Advance Biological Concepts is a free choice mineral supplement. It is intended for horses and ponies of all ages and work levels.
Absolute HA (AniMed)
FlavorFlavor
HealthHealth
JointsJoints
SeniorSenior
AniMed's Absolute HA is meant to maintain a horse's normal joint mobility and health. It contains HA, an element of cartilage and synovial fluid in joints, aiming to help with lubrication and flexibility.
Accel Health and Wellness Formula (Vita Flex)
HealthHealth
Mineral BalanceMineral Balance
MuscleMuscle
VitaminsVitamins
Accel Health and Wellness Formula is a vitamin and mineral supplement for horses. It contains both organic and inorganic trace minerals.
Accel Lifetime (Vita Flex)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Accel Lifetime is a vitamin and mineral supplement providing 18% crude protein. It contains a mix of organic and inorganic trace minerals.
Accelerate (Right Choice)
Coat QualityCoat Quality
FatFat
NutritionNutrition
Weight IssuesWeight Issues
Accelerate is a textured complete feed with 12% protein and 8% fat. It is formulated for performance horses with added yeast and a combination of organic and inorganic minerals.
Accelerate GH (Right Choice)
FatFat
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
Accelerate GH is a pelleted complete feed with 12% protein, 8% fat, and 24% NSC. It contains organic minerals as well as pre and probiotics for digestive support.
Acti-Flex (Cox Vet Labs)
ExerciseExercise
JointsJoints
NutrientsNutrients
RecoveryRecovery
Acti-Flex is a liquid pina colada flavoured joint supplement containing chondroitin, glucosamine, MSM and hyaluronic acid. It is formulated to support connective tissue in horses.
Acti-Flex Powder (Cox Vet Lab)
ExerciseExercise
JointsJoints
RecoveryRecovery
SeniorSenior
Acti-Flex Pellets is a supplement intended to support joint health in horses of all ages and work levels. It contains chondroitin, glucosamine, MSM, and HA.
Acti-Flex Senior (Cox Vet Lab)
FatFat
JointsJoints
ProbioticProbiotic
Weight IssuesWeight Issues
Acti-Flex Senior is a supplement intended to support joint health. It also contains extra fat and probiotics to help support gut health. Ideal for mature horses prone to stiffness and discomfort.
Air-Way EQ (MVP)
HealthHealth
ImmunityImmunity
RespiratoryRespiratory
VitaminsVitamins
Air-Way EQ by MVP is a pelleted supplement that is intended to help maintain normal histamine levels in horses with seasonal allergies. It contains ingredients that are meant to support healthy lungs and the immune system.
Aleria (Arenus Animal Health)
AntioxidantAntioxidant
HealthHealth
ImmunityImmunity
RespiratoryRespiratory
Aleria from Arenus Animal Health is a powder immune supplement. This supplement is intended to support respiratory and immune function in horses.
Alfa Essentials (Tribute)
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
Ration BalancerRation Balancer
VitaminsVitamins
Alfa Essentials is a ration balancer formulated for diets that contain greater than 50% legume forages such as alfalfa. It provides higher phosphorous than calcium to balance elevated levels of calcium.
Alfa Growth (Tribute Equine)
Complete FeedComplete Feed
FatFat
GrowthGrowth
LactationLactation
Tribute Alfa Growth® is a textured feed for growing horses and pregnant or lactating broodmares that are consuming 50% or more legume forages such as alfalfa hay.
Alfa Prime (Running Horse)
EnergyEnergy
ExerciseExercise
Feed EfficiencyFeed Efficiency
PerformancePerformance
Alfa Prime is a complete extruded feed intended for equine athletes with 14% protein and 8% fat. It is formulated with digestible fibre from alfalfa meal and soybean hulls and utilizes vegetable oil, rice bran and flaxseed as fat sources.
Alfalfa Advantage (ProElite)
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
ProElite Alfalfa Advantage is a low-feeding rate pelleted ration balancer intended to balance diets composed of alfalfa forages. It can be fed to all classes of horses.
Alfalfa Bermuda Blend Pellets (Ametza)
FiberFiber
ForageForage
Mineral BalanceMineral Balance
VitaminsVitamins
Alfalfa Bermuda Blend Pellets by Ametza is a pelleted feed that is meant to provide energy from sources such as alfalfa and Bermuda hay. It is intended for horses in light to moderate work.
Alfalfa Bermuda Hay Pellets (Ace Hi Feeds)
FiberFiber
ForageForage
Gut HealthGut Health
NutritionNutrition
Alfalfa Bermuda Hay Pellets can be used as a forage replacement for horses. This product also contains added vitamins and minerals. This feed is beneficial for older horses who have difficulty chewing.
Alfalfa Hay & Grain Pellets (Ace Hi Feeds)
FiberFiber
ForageForage
GrainsGrains
NutritionNutrition
Alfalfa Hay & Grain Pellets contain a blend of alfalfa forage and ground grain (barley or corn). This product contains a minimum of 12.5% protein, as well as added vitamins and minerals.
Alfalfa Hay Pellets (Ace Hi Feeds)
FiberFiber
ForageForage
Gut HealthGut Health
NutritionNutrition
Alfalfa Hay Pellets are a high protein forage source for horses. It contains a minimum of 14% protein and has added vitamins and minerals. This feed is beneficial for older horses, horses with bad teeth, or horses who are sensitive to breathing in dust from long-stem hay.
Alfalfa Hay Pellets (Kelley’s Feed)
FiberFiber
ForageForage
NutritionNutrition
ProteinProtein
Kelley's Feed Alfalfa Hay Pellets by is an alfalfa-based feed in a pelleted form with molasses for palatability. Hay pellets are recommended for horses with dental or respiratory issues. This forage replacement contains added vitamins and inorganic minerals.
Alfalfa Pellets (Ametza)
FiberFiber
ForageForage
Mineral BalanceMineral Balance
VitaminsVitamins
Alfalfa Pellets by Ametza is a pelleted feed that is intended to supply horses of all life stages with adequate energy. This feed contains alfalfa and is designed for maintenance or moderate to heavy working animals.
Alfalfa Support (Pureform)
AntioxidantAntioxidant
JointsJoints
Mineral BalanceMineral Balance
VitaminsVitamins
Pureform Alfalfa Support is a vitamin/mineral supplement designed for horses on diets containing high levels of alfalfa hay. It is suitable for all life stages and includes ingredients for joint health, such as glucosamine and MSM.
Alfalfa-Oat Hay Pellets (Ace Hi Feeds)
FiberFiber
ForageForage
NutritionNutrition
ProteinProtein
Alfalfa-Oat Hay Pellets by Ace Hi Feeds can be used as a forage replacement for horses. This product contains at least 12% protein, added molasses, and added vitamins and minerals.
Alfalfa/Bermuda Hay Pellets (Star Milling Co)
DentalDental
FiberFiber
ForageForage
NutritionNutrition
Alfalfa/Bermuda Hay Pellets by Star Milling Co are a blend of alfalfa and Bermuda hay designed as a forage replacement for horses. It contains 32% fiber and 11% protein in a 3/8 inch pellet with added molasses, vitamins, and minerals.
Alfalfa/Oat Hay Pellets (Kelley’s Feed)
FiberFiber
ForageForage
GrainsGrains
NutritionNutrition
Alfalfa/Oat Hay Pellets by Kelley's Feed is a pelleted forage replacement containing alfalfa and oat hay with added vitamins and minerals. Molasses is used for palatability and as an energy source.
Align (OE Nutraceuticals)
Gut HealthGut Health
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Align is a vitamin and mineral supplement intended for performance horses. It contains prebiotics and probiotics which are meant to support gut health.
All In (Woody’s Horse Nutrition)
HealthHealth
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
All In by Woody’s Horse Nutrition is a pelleted vitamin and mineral supplement intended for horses on a forage-based or unfortified grain diet. It contains the limiting amino acids lysine, methionine, and threonine.
All in One (Herbs for Horses)
Gut HealthGut Health
HealthHealth
Mineral BalanceMineral Balance
PerformancePerformance
All in One from Herbs for Horses is intended to be a complete supplement for horses. All in One is intended to improve digestion, and rebuild muscle. This supplement contains added vitamins and minerals.
All-In-One Supplement (Extreme Equine Supplements)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
NutritionNutrition
VitaminsVitamins
All-In-One Supplement by Extreme Equine Supplements is a comprehensive vitamin and mineral formula designed to support overall health and development in horses.
All-Phase (Himalayan Horse)
Mineral BalanceMineral Balance
NutrientsNutrients
NutritionNutrition
VitaminsVitamins
All-Phase by Himalayan Horse is a pelleted complete feed containing vitamins and minerals. It is intended for horses with a roughage, pasture or grain based diet, or horses requiring reduced calories.
ALL-PRO (AniMed)
DigestionDigestion
HealthHealth
StressStress
YeastYeast
AniMed's ALL-PRO powder supplement aims to promote normal and healthy digestive functions and contains pre- and probiotics. It is meant to be beneficial during times of stress or changes in diet.
Aller-Cease (Peak Performance Nutrients)
HealthHealth
HerbHerb
NutrientsNutrients
RespiratoryRespiratory
Aller-Cease by Peak Performance Nutrients is meant to support the respiratory system. This supplement is intended for horses with seasonal allergies or dust sensitivities.

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