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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.
UltraCruz Equine Wellness Performance Supplement (Santa Cruz Animal Health)
HealthHealth
Mineral BalanceMineral Balance
Omega 3-6-9Omega 3-6-9
VitaminsVitamins
UltraCruz Equine Wellness Performance Supplement is formulated to supplement vitamins and minerals, antioxidants, and fatty acids to the horse’s diet. This includes zinc, copper, and Vitamin E. It supplies 2 mg of biotin per serving (136 g).
UltraCruz Multi-Oil Blend (Santa Cruz Animal Health)
Caloric EnergyCaloric Energy
Coat QualityCoat Quality
FatFat
Omega 3-6-9Omega 3-6-9
UltraCruz Multi-Oil Blend is a fat supplement containing soybean, flax, and salmon oil. This oil is designed for horses, dogs, and livestock and provides added vitamin E, A, and D.
UN-LOCK Race Performance Powder (BRL Equine)
Amino AcidAmino Acid
ElectrolyteElectrolyte
ExerciseExercise
PerformancePerformance
UN-LOCK Equine Race Performance Powder is a muscle supplement containing branched-chain amino acids, vitamins, and electrolytes. It is a source of the amino acids L-valine, L-leucine, L-isoleucine, l-glutamine, L-arginine, and L-carnitine.
Unbeetable Complete (Unbeetable Feeds)
EnergyEnergy
Grain FreeGrain Free
Low NSC FeedsLow NSC Feeds
ProteinProtein
Unbeetable Complete by Unbeetable feeds is a grain free complete feed intended for all horse types. It contains a blend of organic and inorganic trace minerals.
Vantiox (Omega Alpha)
AntioxidantAntioxidant
MuscleMuscle
NutrientsNutrients
RecoveryRecovery
Vantiox is an antioxidant supplement that provides vitamin C (ascorbic acid), synthetic vitamin E, organic zinc, beta carotene and organic selenium. Antioxidants can support metabolic function, muscle health, exercise recovery and other processes.
Veloci-T Max (Purina)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
Purina Veloci‑T Max is a textured feed intended for racehorses, breeding stallions, early gestating mares, and yearlings. . It is formulated with higher fat and starch levels to meet the high energy demands of performance horses.
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.
Veteran Light (Allen & Page)
DigestionDigestion
Easy KeeperEasy Keeper
Low NSC FeedsLow NSC Feeds
NutritionNutrition
Veteran Light from Allen & Page is a low-energy pelleted feed that is high in fibre with a low NSC content (8.5%). Veteran Light is a palatable horse feed with added probiotics.
Veteran Vitality (Allen & Page)
DigestionDigestion
IngredientIngredient
NutritionNutrition
SeniorSenior
Veteran Vitality from Allen & Page is a palatable feed for horses with poor dentition. This feed is high in fibre and includes added vitamins and minerals. Veteran Vitality contains herbs such as mint, nettle, dandelion, garlic, and fenugreek.
Vita-Sorbine (Cox Vet Lab)
Blood CellsBlood Cells
EnergyEnergy
FlavorFlavor
VitaminsVitamins
Vita-Sorbine is an iron rich vitamin supplement intended to help increase appetite and to support the blood's ability to supply energy and repair tissues through the body without gastric upset.
VITAboost-Pellet (Herbs for Horses)
Blood CellsBlood Cells
MetabolismMetabolism
Mineral BalanceMineral Balance
VitaminsVitamins
Vitaboost is a multivitamin blend for horses containing 8 water soluble B-vitamins, Vitamin C, natural Vitamin E, microminerals, organic selenium, and amino acids.
VITAboost-Powder (Herbs for Horses)
Blood CellsBlood Cells
MetabolismMetabolism
Mineral BalanceMineral Balance
VitaminsVitamins
Vitaboost is a multivitamin blend for horses containing 8 water soluble B-vitamins, Vitamin C, natural Vitamin E, microminerals, organic selenium, and amino acids.
Vitamin C
AntioxidantAntioxidant
ImmunityImmunity
JointsJoints
StressStress
Vitamin C (Ascorbic Acid) is a water-soluble vitamin found in high quantities in pasture. Vitamin C acts as an antioxidant and is involved in synthesizing collagen, hormones and neurotransmitters.
Vitamin C (Equestrizone)
AntioxidantAntioxidant
Competition HorsesCompetition Horses
ImmunityImmunity
IngredientIngredient
Vitamin C from Equestrizone is an antioxidant which can be fed to horses at times of stress or illness. It is from Equestrizone provides joint and cardiovascular support for horses and ponies.
Vitamin C Powder (CEN)
ImmunityImmunity
IngredientIngredient
RecoveryRecovery
VitaminsVitamins
Vitamin C Powder from CEN is a single ingredient powdered supplement that is meant to boost horses' immunity. It can help with allergies, illness or injury recovery, and inflammation.
Vitamin C Powder (Cox Vet Lab)
AntioxidantAntioxidant
ImmunityImmunity
RespiratoryRespiratory
VitaminsVitamins
Vitamin C Powder by Cox Vet Lab is a vitamin powder supplement intended to help support a horse's immune system. It may also be beneficial to aid in ulcerated tissue healing.
Vitamin C Pure (Basic Equine Nutrition)
AntioxidantAntioxidant
IngredientIngredient
NutrientsNutrients
VitaminsVitamins
Vitamin C (ascorbic acid) is a water-soluble vitamin that supports the immune system. It is supplemented in the equine diet to promote peak performance and support recovery from illness.
Vitamin E & Selenium Formula (Vita Flex)
AntioxidantAntioxidant
HealthHealth
ImmunityImmunity
Organic Trace MineralsOrganic Trace Minerals
Vita Flex E and Selenium is a powdered vitamin E and selenium supplement intended to support muscle function and metabolism in horses. Each serving provides 1 mg selenium from inorganic sodium selenite and 1,000 IU vitamin E.
Vitamin E, Selenium and Zinc (Peak Performance Nutrients)
AntioxidantAntioxidant
MuscleMuscle
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Vitamin E, Selenium & Zinc by Peak Performance Nutrients is a powdered vitamin and mineral horse supplement containing antioxidants to help protect against free radical damage and support the immune system and cellular health.
Vitamin E/C (Stride Animal Health) – [Discontinued]
AntioxidantAntioxidant
HealthHealth
ImmunityImmunity
VitaminsVitamins
This supplement from Stride Animal Health provides antioxidants by containing vitamin E and vitamin C. This assists the body in maintaining healthy tissues and cells and increasing immunity.
Vitamin Multi (Krafft)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Vitamin Multi is a liquid supplement intended to help maintain a horse's overall health. It is designed for performance horses, and broodmares.
Vitamins & Electrolyte Concentrate (Durvet)
ElectrolyteElectrolyte
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Vitamins & Electrolytes Concentrate by Durvet is a water soluble premix intended to be used for animals when feed intake is inadequate. This premix can be used for horses, cattle, goats, sheep, swine and poultry of all classes.
Vitamins & Electrolyte Plus (AgriLabs/ProLabs)
ElectrolyteElectrolyte
ExerciseExercise
HydrationHydration
VitaminsVitamins
AgriLabs Vitamins & Electrolyte Plus is a water-soluble powder supplement that provides vitamins, electrolytes and acidifiers for livestock animals and poultry. It is formulated for use during periods of stress or reduced feed intake.
Vitamins & Electrolytes (Durvet)
ElectrolyteElectrolyte
Mineral BalanceMineral Balance
StressStress
VitaminsVitamins
Vitamins & Electrolytes by Durvet is a water soluble vitamin and electrolyte premix intended to be used when animals are subjected to stress. This premix can be used for horses, cattle, goats, sheep, swine and poultry of all classes.
Vitamins & Minerals Alfalfa (Equine Challenge)
HealthHealth
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
VitaminsVitamins
Vitamins and Minerals Alfalfa by Equine Challenge is a vitamin and mineral supplement intended for horses on Alfalfa based diets.
Vitamins & Minerals Grass (Equine Challenge)
Vitamins & Minerals Grass from Equine Challenge is an equine supplement formulated for horses on grass diets. Vitamins & Minerals Grass is intended to assist in healthy coat and hoof growth. This supplement is formulated with flaxseed, added vitamins, minerals, and probiotics.
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.
VMZ-25 Multi-Vitamin (Hestevard)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
VMZ-25 Multi Vitamin by Hestevard is a vitamin and mineral supplement intended for horses and ponies requiring a low sugar diet.
Weight-Up (AniMed)
DigestionDigestion
FatFat
Weight IssuesWeight Issues
YeastYeast
Weight-Up from AniMed is a supplement meant to help horses gain weight, and maintain an optimal weight. It contains calories and fat while also supporting a healthy digestive system. It also has yeast included.
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 L/S Concentrate (Purina)
Complete FeedComplete Feed
FiberFiber
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Purina WellSolve L/S® Concentrate Horse Feed is a pelleted feed targeted to horses that require a low starch and sugar diet. It provides a maximum of 11% NSC from starch (7%) and sugar (4%).
WellSolve W/C Weight Control (Purina)
AntioxidantAntioxidant
Easy KeeperEasy Keeper
NutritionNutrition
Weight IssuesWeight Issues
Purina WellSolve WC® is an extruded concentrate horse feed with a lower calorie density. It is designed to add fibre and nutrients to the diet with low fat content to support weight control.
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.
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.
Wilson’s Cool Formula (Wilson Feeds)
Mineral BalanceMineral Balance
NutrientsNutrients
ProteinProtein
YeastYeast
Wilson's Cool Formula by Wilson Feeds is a granular, textured horse feed formulated to balance forage-based diets. It is soy-free and contains peas and alfalfa as protein sources.
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.
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.
XLR8 (Mitavite)
EnergyEnergy
ExerciseExercise
Gut HealthGut Health
PerformancePerformance
XLR8 by Mitavite is an oat-free micronized feed intended for horses in training, racing and competition.
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.
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.

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