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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.
EQ Pro-Coll (ER)
JointsJoints
Mineral BalanceMineral Balance
RecoveryRecovery
VitaminsVitamins
EQ Pro-Coll from ER is a liquid supplement for horses that is intended to support joint health. It contains vitamins, minerals, collagen, MSM, glucosamine, chondroitin and hyaluronic acid.
Eq-Well (Arenus Animal Health)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
NutritionNutrition
Eq-Well by Arenus Animal Health is an equine vitamin and mineral balancer. It is a granular supplement intended for horses of all ages and work levels.
EQ16 Texturized (Masterfeeds)
BroodmareBroodmare
Complete FeedComplete Feed
FoalFoal
LactationLactation
Masterfeeds EQ16 Texturized is a high-calorie textured horse feed targeted to growing yearlings and pregnant or lactating mares. It provides 16% protein in a grain mix with added molasses for palatability.
EQ8 Gut Health (Buckeye)
DigestionDigestion
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
EQ8 Gut Health is a textured feed intended for horses in maintenance to moderate exercise. This feed provides 20% NSC and contains calcium, prebiotics, probiotics and yeast to support digestive health.
EQ8 Performance Gut Health (Buckeye)
DigestionDigestion
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
EQ8 Performance Gut Health is a calorie-dense extruded feed for active horses. This feed contains 20% NSC, 14% protein and 12% fat. It provides calcium, probiotics and yeast to support digestive health.
EQ8 Senior Gut Health (Buckeye)
DigestionDigestion
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
EQ8 Senior Gut Health is a multi-textured feed formulated for geriatric horses. It provides 14% protein, 10% fat and 20% NSC. It contains calcium, prebiotics, probiotics and yeast to support digestive health.
Eqceed 14 (Tucker Milling)
Complete FeedComplete Feed
FiberFiber
HealthHealth
NutritionNutrition
Eqceed 14 by Tucker Milling is a pelleted complete feed that contains 8% fat. It is formulated for working and maintenance horses and is marketed as a low starch feed.
Eqceed Ultra Senior (Tucker Milling)
Complete FeedComplete Feed
Gut HealthGut Health
Metabolic SyndromeMetabolic Syndrome
SeniorSenior
Eqceed Ultra Senior by Tucker Milling is a textured, high-fat, low-starch feed formulated specifically for senior horses. It includes shredded beet pulp and Lactobacillus, which supports gut health, and it can served as a complete replacement for hay or pasture.
Equerry’s Choice (Equerry’s Horse)
DigestionDigestion
Mineral BalanceMineral Balance
ProbioticProbiotic
VitaminsVitamins
Equerry's Choice is a micro-encapsulated blend of probiotics and digestive enzymes. It also contains minerals and vitamins including organic selenium. This supplement is recommended for all horses and ponies at any work level.
Equerry’s Economy Supplement
DigestionDigestion
FiberFiber
Mineral BalanceMineral Balance
ProteinProtein
Equerry's Economy Supplement is an alfalfa, wheat and oat-based gut health supplement for horses containing microencapsulated probiotics, digestive enzymes, vitamins, and minerals.
Equerry’s Plus
DigestionDigestion
Mineral BalanceMineral Balance
VitaminsVitamins
YeastYeast
Equerry's Plus is a horse supplement that provides microencapsulated probiotics and digestive enzymes. This product contains live yeast culture, chelated minerals, and vitamins. Equerry's Plus is intended for all horses and ponies.
Equi-Base Grass Pellets (Uckele)
HealthHealth
MetabolismMetabolism
NutrientsNutrients
Ration BalancerRation Balancer
Equi-Base Grass Pellet is a base mineral and vitamin supplement designed to balance diets based on grass hay/forage or a 50/50 alfalfa grass forage.
Equi-Base Senior (Uckele)
HealthHealth
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
Equi-Base Senior is a powdered vitamin, mineral and amino acid supplement formulated for senior horses. It contains ingredients which can support hoof, coat, immune and digestive function.
Equi-Bone Pellets (TLC Animal Nutrition)
Bone HealthBone Health
JointsJoints
NutrientsNutrients
RecoveryRecovery
Equi-Bone by TLC Animal Nutrition is a pelleted supplement intended to support bone health in all horse types.
Equi-Bone Powder (TLC Animal Nutrition)
Bone HealthBone Health
JointsJoints
NutrientsNutrients
RecoveryRecovery
Equi-Bone Powder by TLC Animal Nutrition is a powdered supplement intended to support bone health in all horse types.
Equi-Eez (Purina)
HealthHealth
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
VitaminsVitamins
Equi-Eez is a concentrated mineral and vitamin supplement that does not contain fibre, fat or protein. It is fortified with biotin to support hoof health and coat quality.
Equi-VM (Uckele)
HealthHealth
NutrientsNutrients
ProbioticProbiotic
Ration BalancerRation Balancer
Equi-VM is a powdered vitamin and trace mineral supplement from Uckele Health & Nutrition. It also contains probiotics and digestive enzymes.
EquiBalance (Sollio Agriculture)
Amino AcidAmino Acid
HealthHealth
Low NSC FeedsLow NSC Feeds
VitaminsVitamins
EquiBalance is a concentrated pelleted vitamin, mineral and amino acid supplement for horses. EquiBalance is intended for horses who are receiving a complete feed. This supplement is intended for horses with metabolic disorders.
Equibility (Hallway)
Complete FeedComplete Feed
ExerciseExercise
FatFat
FiberFiber
Equibility from Hallway is a pelleted feed fortified with Stamm 30 formulated for active adult horses. This feed uses energy from digestible fibres and vegetable oil, providing 12% protein, 8% fat, and 15% fibre.
EquiForce Foot (Havens Horsefeed)
Amino AcidAmino Acid
Hoof HealthHoof Health
NutrientsNutrients
VitaminsVitamins
EquiForce Foot by Havens Horsefeed is an equine hoof health supplement. It contains biotin, B-vitamins, amino acids, and minerals to support hoof growth. One scoop supplies 75mg of biotin.
EquiForce Lyte (Havens Horsefeed)
ElectrolyteElectrolyte
HydrationHydration
Mineral BalanceMineral Balance
StaminaStamina
EquiForce Lyte by Havens Horsefeed is an electrolyte supplement for exercising horses. It contains minerals and antioxidants to support performance. This supplement supports muscle recovery and increased water consumption.
Equilibrium Legend XT (Purina)
BroodmareBroodmare
FatFat
FiberFiber
PerformancePerformance
Equilibrium Legend XT is a high caloric extruded feed made for performance athletes and broodmares. It contains 10% fat and 10% fiber.
Equilibrium Maternity XT (Purina)
BroodmareBroodmare
Complete FeedComplete Feed
GrowthGrowth
LactationLactation
Equilibrium Maternity XT is an extruded feed formulated for gestating mares as well as nursing and growing foals. It provides high energy and protein (16.5%) from ingredients such as soybean meal, flax, wheat, soybean oil and molasses.
Equilibrium Optimal (Purina)
BroodmareBroodmare
NutrientsNutrients
Ration BalancerRation Balancer
VitaminsVitamins
Equilibrium Optimal is a ration balancer formulated for all classes of horses. It can be fed alone or in combination with complete feeds or other feed ingredients such as beet pulp.
Equilibrium Sport XT (Purina) – [Discontinued]
Caloric EnergyCaloric Energy
ExerciseExercise
GrowthGrowth
PerformancePerformance
Equilibrium Sport XT is an extruded feed formulated for performance, breeding and growing horses. It provides high fat (10%) and moderate protein (14%) from ingredients including soybean meal, flax, wheat, soybean oil and molasses.
Equilibrium Trimax (Purina)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
PerformancePerformance
Weight IssuesWeight Issues
Purina Equilibrium Trimax is an energy-dense multi-particle feed intended for hard-keepers and performance horses. It provides 12% fat from vegetable oils and fermentable fibre from beet pulp to meet higher calorie requirements.
Equilibrium® XCEL HD (Purina Canada)
Competition HorsesCompetition Horses
FatFat
HindgutHindgut
Weight IssuesWeight Issues
Equilibrium® XCEL HD is a high-fat feed from the Purina Platinum product line. This low glycemic feed contains higher fat and fibre content and is intended for equine athletes and hard keepers.
Equiline Pelleted Senior Care Ration (Shur-Gain)
FatFat
FiberFiber
NutritionNutrition
SeniorSenior
Equiline Pelleted Senior Care Ration by Shur-Gain is a pelleted feed that is intended to be fed to horses over 18 years of age. It contains elevated protein levels to accommodate reduced metabolic function.
Equine 12-8 Mineral (Tribute)
HealthHealth
Hoof HealthHoof Health
Mineral BalanceMineral Balance
NutrientsNutrients
Tribute Equine 12-8 is a vitamin/mineral supplement intended for all horses. It contains a blend of organic and inorganic mineral sources.
Equine Aged/Adult Diet (Ace Hi Feeds)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
NutritionNutrition
SeniorSenior
Equine Aged/Adult Diet by Ace Hi Feeds is intended for mature or senior horses. It is available with or without molasses and contains added vitamins and minerals. This is a textured feed meant to be fed alongside a forage.
Equine Certa-Flx Solution
ExerciseExercise
JointsJoints
RecoveryRecovery
SeniorSenior
Equine Certa-Flx Solution is an equine liquid joint supplement formulated with amino acids and hyaluronic acid. This supplement is recommended for performance and adult horses.
Equine Concentrate (Paddock Tree Nutraceuticals)
Grain FreeGrain Free
HealthHealth
NutrientsNutrients
NutritionNutrition
Equine Concentrate by Paddock Tree Nutraceuticals is a concentrate formulated to be fed along with highly digestible fibre sources, like beet pulp or forage cubes. It is intended for all horse types.
Equine Focus (Bar Ale)
FiberFiber
MuscleMuscle
NutrientsNutrients
YeastYeast
Equine Focus from Bar Ale is intended to be fed to horses and ponies of all ages and work levels. Equine Focus contains beet pulp and soybean meal. Equine Focus total NSC content is 21%.
Equine GastroBalance (Enviro Equine)
Bone HealthBone Health
Gut HealthGut Health
Toxin BinderToxin Binder
UlcersUlcers
Gastrobalance is a gut health supplement for horses that contains bentonite clay, limestone and minerals. It is also marketed as an electrolyte powder to support hydration.
Equine HA 300 (Purica)
HealthHealth
JointsJoints
NutritionNutrition
VitaminsVitamins
Equine HA 300 from Purica is a hyaluronic acid supplement that also contains vitamin C. It is meant to help with joint health and function.
Equine Recovery Extra Strength (Purica)
Bone HealthBone Health
JointsJoints
RecoveryRecovery
StaminaStamina
Equine Recovery Extra Strength from Purica is a horse supplement intended to assist with bone and muscle health. It contains MSM, glucosamine and other ingredients.
Equine Restart (Equi-lete)
Gut HealthGut Health
HealthHealth
ImmunityImmunity
StressStress
Equine Restart by Equi-lete is a microbial supplement intended to support the gastrointestinal tract and overall immune health in all horse types.
Equine Selenium and Vitamin E (Mega-Sel)
Coat QualityCoat Quality
Hoof HealthHoof Health
MuscleMuscle
StaminaStamina
Equine Selenium and Vitamin E by Mega-Sel is a flavored liquid supplement. It is intended to assist with stamina and muscle, coat, and hoof health.
Equine Senior Active (Purina)
EnergyEnergy
ExerciseExercise
Gut HealthGut Health
SeniorSenior
Purina® Equine Senior® Active is a concentrate horse feed containing pelleted and extruded components. It provides 14% fibre and 10% fat content.
Equine Senior® Complete Horse Feed (Purina Mills)
Complete FeedComplete Feed
DentalDental
ImmunityImmunity
SeniorSenior
Purina Equine Senior is a complete feed in an easy-to-chew formulation targeted at older horses. It contains 14% crude protein, 5.5% fat, and 19% NSC.
Equine Super Diet (Equistro – Vetoquinol)
AntioxidantAntioxidant
FlavorFlavor
Mineral BalanceMineral Balance
VitaminsVitamins
Equistro Equine Super Diet is a low feeding rate mineral and vitamin supplement formulated in an alfalfa pellet with apple flavouring.
Equinox (Probiotech)
AntioxidantAntioxidant
HealthHealth
VitaminsVitamins
YeastYeast
Equinox from Probiotech is a supplement that contains antioxidants that can help protect against free radicals. It is also meant to reduce oxidative stress.
EquiPod (Lozana Health)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
NutrientsNutrients
NutritionNutrition
EquiPod is a supplement product intended to support hoof health, hoof growth and hoof hardness.
Equitonic (Daily Dose Equine)
ImmunityImmunity
Mineral BalanceMineral Balance
PrebioticPrebiotic
ProbioticProbiotic
Equitonic by Daily Dose Equine is a liquid supplement that is intended to support increased nutrient absorption for horses of all life stages. It contains prebiotics, probiotics, and trace minerals.
EquiZyme (Bio-Nutrition Laboratories)
HealthHealth
Mineral BalanceMineral Balance
PrebioticPrebiotic
VitaminsVitamins
EquiZyme from Bio-Nutrition Laboratories is a vitamin-mineral supplement. This supplement contains added manno-oligosaccharides, selenium and yeast cultures intended for horses in various performance levels.
Essential (DePaolo Equine Concepts)
Amino AcidAmino Acid
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Essential by DePaolo Equine Concepts is a pelleted supplement that intends to promote healthy coat and hooves, and support a strong immune system. It contains ingredients such as L-Lysine, Biotin, and Vitamins A, B, D, and E.
Essential K (Tribute)
Amino AcidAmino Acid
HealthHealth
Ration BalancerRation Balancer
VitaminsVitamins
Tribute Essential K is a ration balancer with a low 12.5% NSC (sugar plus starch). Essential K provides a mix of organic and inorganic trace minerals, including organic selenium yeast.
Essential K GC Plus (Tribute)
JointsJoints
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Ration BalancerRation Balancer
Tribute Essential K GC Plus is a lower-inclusion ration balancer formulated with glucosamine, chondroitin sulfate, and MSM meant to support joint health.
Essential K Rebuild (Tribute)
Low NSC FeedsLow NSC Feeds
PerformancePerformance
Ration BalancerRation Balancer
RecoveryRecovery
Essential K Rebuild by Tribute is a low-starch, low-sugar pelleted ration balancer formulated for performance horses. Different from Essential K, it has added chromium and turmeric.
Essential K w/ Fly Control (Tribute)
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
Ration BalancerRation Balancer
VitaminsVitamins
Tribute Essential K with Fly Control is a low feeding-rate ration balancer with Diflubenzuron, which can regulate the emergence of common flies.

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