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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.
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.
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.
Ester-C (Peak Performance Nutrients)
AntioxidantAntioxidant
DigestionDigestion
ImmunityImmunity
VitaminsVitamins
Ester-C by Peak Performance Nutrients is a supplement containing a non-acidic form of Vitamin C that is meant to be easy on the stomach. Vitamin C is intended to provide additional immune system support.
Ester-C (Pure) (MVP)
AntioxidantAntioxidant
JointsJoints
StressStress
VitaminsVitamins
Ester-C by MVP is a powdered supplement for horses made of pure vitamin C that intends to support the immune system. Vitamin C is an antioxidant that may promote collagen synthesis and reduces oxidative stress.
Evolution Elite (Purina)
Complete FeedComplete Feed
ExerciseExercise
Gut HealthGut Health
Weight IssuesWeight Issues
Purina Evolution Elite is a multi-particle complete feed containing extruded and pelleted components. It is formulated with 13% protein and 8% fat.
Evolution Juvenile (Purina)
Caloric EnergyCaloric Energy
FoalFoal
GrowthGrowth
Ration BalancerRation Balancer
Evolution Juvenille is a multiparticle feed for growing horses made with pelleted and extruded components. It is designed to meet the nutritional needs of weanlings, yearlings and two-year olds.
Evolution Maternity (Purina)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Purina Evolution Maternity is a pelleted and extruded feed intended for late gestation and lactating broodmares and nursing and growing foals. Energy sources include corn, soy hulls, beet pulp, alfalfa meal, and flaxseeds.
Evolution Senior (Purina)
Caloric EnergyCaloric Energy
Gut HealthGut Health
Ration BalancerRation Balancer
SeniorSenior
Purina Evolution Senior is a low glycemic pelleted and extruded horse feed intended for mature horses 15 years of age and older. it contains prebiotics, probiotics, yeast culture, and a balance of amino acids to help maintain ideal gut health.
Exceed 6-way (MVP)
Coat QualityCoat Quality
Gut HealthGut Health
Hoof HealthHoof Health
JointsJoints
Exceed 6-way from MVP is intended for joint, gastric, muscle, coat, hoof, and digestive health support. Some of the active ingredients include hyaluronic acid, MSM, biotin, zinc, copper, amino acids, probiotics, prebiotics, and a variety of herbs.
Exceed 6-Way Pellet (MVP)
JointsJoints
Mineral BalanceMineral Balance
MuscleMuscle
Omega 3-6-9Omega 3-6-9
Exceed 6-Way is a pelleted horse supplement containing MSM, glucosamine, hydrolyzed collagen, and yucca schidigera extract. It is formulated to support joints, hoof health, gut, and hair coat.
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.
Farrier’s Formula Double Strength (Life Data Labs)
Amino AcidAmino Acid
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Farrier's Formula® Double Strength is a pelleted horse supplement formulated to support hoof health. It contains amino acids, biotin, and minerals at twice the concentration of the original Farrier's Formula.
Farrier’s Formula DS Plus Joint (Life Data Labs)
Hoof HealthHoof Health
JointsJoints
Mineral BalanceMineral Balance
VitaminsVitamins
Farrier's Formula DS Plus Joint by Life Data Labs is a pelleted supplement that intends to support hoof growth and joint support. It contains 20mg of biotin per serving and a high level of glucosamine.
Farrier’s Formula Hoof Supplement (Life Data Labs)
Amino AcidAmino Acid
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Farrier's Formula Hoof Supplement is a vitamin, mineral, and amino acid supplement that supports healthy hoof structure and growth. It is primarily composed of methionine, biotin and inorganic sources of zinc and copper.
Fat Maxx (Strictly Equine)
Coat QualityCoat Quality
FatFat
NutritionNutrition
Ration BalancerRation Balancer
Fat Maxx by Strictly Equine is a top dressing supplement, intended to meet nutritional requirements for horses daily needs. It is intended to support weight and improve coat quality.
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.
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.
Fish Oil Factor (Stride Animal Health) – [Discontinued]
Coat QualityCoat Quality
FatFat
PerformancePerformance
Skin + HairSkin + Hair
Fish Oil Factor is a supplement that contains fat, omega-3s and fatty acids. It is meant to aid in coat and skin health as well as hoof health. It can be fed to breeding and growing horses.
Flex Wafer (Majesty’s)
JointsJoints
NutrientsNutrients
PerformancePerformance
SeniorSenior
Flex Wafer's are designed to provide horses and ponies with essential nutrients to promote healthy joints.
Flex XT Wafer (Majesty’s)
JointsJoints
NutrientsNutrients
PerformancePerformance
SeniorSenior
Flex XT is a supplement intended to help promote healthy joints in horses and ponies.
FlexMOR (DuMor)
JointsJoints
NutrientsNutrients
PerformancePerformance
SeniorSenior
FlexMOR by DuMor is formulated with glucosamine, MSM and Hyaluronic Acid which supports healthy joints and improves joint mobility.
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 Milk Bits (Hoffman’s Horse Products)
FiberFiber
FoalFoal
HealthHealth
NutritionNutrition
Foal Milk Bits from Hoffman's Horse Products is a pelleted feed for foals. Foal Milk Bits is intended to supplement mare's milk. Foal Milk Bits may provide extra nutrition to foals who require additional calories.
Foal Milk Replacer (Hoffman’s Horse Products)
FatFat
FoalFoal
HealthHealth
NutritionNutrition
Foal Milk Replacer from Hoffman's is intended to replace or supplement a mare's milk. This milk replacer is highly palatable and intended to meet growing foals requirements.
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.
Forcevital (Dynavyte)
CirculationCirculation
HerbHerb
PerformancePerformance
RespiratoryRespiratory
Forcevital by Dynavyte is a herb based supplement intended to support a healthy respiratory and circulatory system in horses.
Formula 3 (Mitavite)
EnergyEnergy
Gut HealthGut Health
PerformancePerformance
ProteinProtein
Formula 3 by Mitavite is a high energy, oat-free feed intended for racing and performance horses.
Formula4 Feet (Equi Life)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Formula4 Feet is an equine hoof supplement that provides 20 mg of biotin in addition to other vitamins and minerals. It contains a combination of organic and inorganic trace minerals.
Fortify (Dove Performance Nutrition)
Mineral BalanceMineral Balance
NutrientsNutrients
Ration BalancerRation Balancer
VitaminsVitamins
Fortify from Dove Performance Nutrition is a pelleted feed ration for horses. It contains vitamins, minerals, protein, fiber and fat.
Frisky Foal (Masterfeeds)
Complete FeedComplete Feed
FoalFoal
GrowthGrowth
ProteinProtein
Masterfeeds 17% Frisky Foal is a pelleted transition feed used to wean nursing foals off of milk and onto solid feed. It provides elevated protein content to support growth.
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.
Furlong (Barastoc)
Amino AcidAmino Acid
Bone HealthBone Health
PerformancePerformance
RecoveryRecovery
Furlong by Barastoc is a oat ration that is meant for racing horses. It contains vitamins, minerals, and amino acids. It can assist with bone health, recovery, and gut health.
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.
GainIT (Durvet)
FatFat
Gut HealthGut Health
Skin + HairSkin + Hair
Weight IssuesWeight Issues
GainIT by Durvet is a high fat supplement intended to help with weight gain, performance and overall health of horses.
Galozyme Equine Sport (Technavet)
Competition HorsesCompetition Horses
DigestionDigestion
Gut HealthGut Health
VitaminsVitamins
Galozyme Equine Sport from Technavet is a supplement meant for horses in competition. It is intended to help with gut health and digestion through bacteria cultures.
Game Changer Plus (OE Nutraceuticals)
AntioxidantAntioxidant
ImmunityImmunity
JointsJoints
MuscleMuscle
Game Changer Plus by OE Nutraceuticals is a powdered supplement designed to support joint and muscle health by helping to reduce inflammation.
Gastro-Plex (Paste) (MVP)
Competition HorsesCompetition Horses
DigestionDigestion
Gut HealthGut Health
StressStress
Gastro-Plex by MVP is a paste supplement for horses that intends to help support healthy gut function. It contains a blend of probiotics and vitamins and is intended for feeding before and during competition.
Gastro-Plex Pellets (MVP)
ColicColic
DigestionDigestion
Gut HealthGut Health
YeastYeast
Gastro-Plex Pellets by MVP is a pelleted supplement that intends to aid digestive function. It contains antioxidants, probiotics and herbs that intend to help support stomach tissue lining and may ease discomfort.
GastroBalance Plus (Enviro Equine)
AntioxidantAntioxidant
Gut HealthGut Health
Hoof HealthHoof Health
Organic Trace MineralsOrganic Trace Minerals
GastroBalance Plus by Enviro Equine is a gastrointestinal support supplement that includes Alltech-chelated organic trace minerals. It is intended to support overall GI tract function, the immune system, and general hoof and coat health in horses
GastroBalance Plus Paste (Enviro Equine)
Gut HealthGut Health
HealthHealth
PerformancePerformance
StressStress
GastroBalance Plus Paste by Enviro Equine is a gut health supplement intended to support horses during stress.
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.
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.
Glanzen Lite Complete (HorseTech)
Easy KeeperEasy Keeper
FlavorFlavor
Hoof HealthHoof Health
Skin + HairSkin + Hair
Glanzen Lite Complete by HorseTech is a powdered supplement intended to support hoof, skin and coat health in easy-keepers and picky eaters.
Glucosamine 5000 (AniMed)
DigestionDigestion
HealthHealth
JointsJoints
VitaminsVitamins
Glucosamine 5000 from AniMed contains glucosamine which is meant to help produce proteoglycans, helping to maintain healthy joints and connective tissue. It also contains Yee-Sacc 1026 which can help with digestion.
Glucosamine Plus (PureForm)
ExerciseExercise
JointsJoints
NutrientsNutrients
SeniorSenior
Pureform Glucosamine Plus is an equine joint supplement that contains glucosamine HCL, MSM, synthetic Vitamin E, Vitamin C, magnesium, and molasses.
Glucosamine XL Plus w/MSM (MVP)
AntioxidantAntioxidant
JointsJoints
Mineral BalanceMineral Balance
RecoveryRecovery
Glucosamine XL Plus w/MSM by MVP is a pelleted supplement for horses that intends to support joint function. It contains ingredients such as glucosamine, MSM, and Ester-C®.

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