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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.
Jump-Start Plus (Manna Pro)
Gut HealthGut Health
ImmunityImmunity
ProbioticProbiotic
StressStress
Jump-Start Plus is a digestive paste that supplies probiotics, sodium bicarbonate, vitamins, and minerals. It is intended to be used during times of stress such as transportation, illness, or competition.
Junior Horse (Ace Hi Feeds)
Complete FeedComplete Feed
FoalFoal
GrowthGrowth
NutritionNutrition
Junior Horse by Ace Hi Feeds is a supplemental feed intended for weanlings, yearlings and two-year olds. It contains 15.5% protein, vitamins, and a blend of organic and inorganic minerals.
Junior Horse (Kelley’s Feed)
FoalFoal
GrowthGrowth
NutritionNutrition
ProteinProtein
Junior Horse by Kelley's Feed is an alfalfa-based textured feed intended for weanlings, yearlings, and two-year-old's. It is intended to be fed alongside a quality forage as a supplement.
JuniorGLO Horse Pellet (ADM Animal Nutrition)
Bone HealthBone Health
FoalFoal
GrowthGrowth
ProteinProtein
JuniorGLO is a concentrated feed designed for foals, growing horses, and broodmares intended for feeding alongside a good-quality forage. It contains ingredients to support gut health, bone growth, and muscle development.
K & C Plus (Cox Vet Lab)
ExerciseExercise
NutrientsNutrients
RecoveryRecovery
VitaminsVitamins
K & C Plus is a supplement intended for performance horses. K & C Plus is formulated to help support normal lung function. K & C Plus contains elevated levels of Vitamin K and Vitamin C.
K Finish (Tribute)
FatFat
Mineral BalanceMineral Balance
VitaminsVitamins
Weight IssuesWeight Issues
Tribute K Finish is a 25% fat equine supplement formulated with a blend of soybean, rice bran, and flaxseed. It can be used as a top-dressing for weight gain or for horses that require additional calories.
Kalm N EZ GC Plus (Tribute)
Complete FeedComplete Feed
FatFat
FiberFiber
JointsJoints
Kalm 'N EZ GC Plus is a pelleted complete feed with added glucosamine, chondroitin sulfate, and methylsulfonlymethane (MSM). It contains 14% crude protein, 8% crude fat and an NSC of 13.5%.
Kalm N EZ Pellets (non-GMO) (Tribute)
Complete FeedComplete Feed
DigestionDigestion
FatFat
FiberFiber
Kalm 'N EZ Pellets (non-GMO) is a complete pelleted feed made with non-GMO soybean hulls and other ingredients. It contains 14% crude protein, 8% crude fat and 13.5% NSC.
Kalm N EZ Pellets (Tribute)
Complete FeedComplete Feed
DigestionDigestion
FatFat
FiberFiber
Tribute Kalm 'N EZ Pellet is a complete horse feed formulated with no corn, oats, or molasses. Providing 13.5% NSC, this feed is appropriate for horses that require a low NSC diet.
Kalm N EZ Soy-Free Pellet (Tribute)
Complete FeedComplete Feed
FatFat
FiberFiber
NutritionNutrition
Kalm N EZ Soy-Free Pellet by Tribute is a pelleted feed that contains no corn, oats or molasses. It is intended for horses with special needs to provide higher fat and fibre to support calmer performances.
Kalm N EZ Textured (Tribute)
EnergyEnergy
ExerciseExercise
FiberFiber
Gut HealthGut Health
Kalm 'N EZ Textured is a textured complete feed with whole oats added. It is formulated to provide highly digestible energy at a lower NSC. It contains 14% crude protein, 6% crude fat, and 15.5% NSC.
Kalm N’ Fit (Tribute Equine)
Complete FeedComplete Feed
DigestionDigestion
FatFat
FiberFiber
Kalm 'N Fit® is a corn-free, high-fat, textured feed for exercising mature horses. It is formulated for horses consuming lower protein forages and contains steam-crimped grains to improve digestibility.
Kalm Performer GC Plus (Tribute)
Complete FeedComplete Feed
JointsJoints
PerformancePerformance
RespiratoryRespiratory
Tribute Kalm Performer is a pelleted complete feed intended for mature horses on high protein forages like alfalfa hay. It is a corn-free formula with steam-crimped grains to support digestibility. It provides 24% NSC.
Kalm Ultra (Tribute Equine)
Complete FeedComplete Feed
ExerciseExercise
StressStress
Weight IssuesWeight Issues
Tribute Kalm Ultra® is a high-fat pelleted feed with 23.5% NSC targeted to adult horses in heavy work or hard keepers that need to gain weight. Kalm Ultra® provides energy from fat and fiber to support calm performance.
Karaflex Pellet (Biopteq)
JointsJoints
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Karaflex Pellet from Biopteq is a supplement meant to assist in joint health. It is a source of vitamins and minerals, and it aims to help with flexibility, mobility, and cartilage health.
Karma: Liquid Calming Supplement (Blue Chip Feed)
CalmingCalming
Competition HorsesCompetition Horses
PerformancePerformance
StressStress
Karma: Liquid Calming Supplement from Blue Chip Feed is designed as a liquid calming supplement that contains water-soluble magnesium, tryptophan, and Niacin. This supplement is intended for performance horses and ponies.
KelatoVIT Performance Pellet (Kelato)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
KelatoVIT Performance Pellet from Kelato is a vitamin and mineral pelleted supplement that also can be found in powdered form. Vitamins and minerals assist in performance, recovery, and overall health.
KelatoVIT Performance Powder (Kelato)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
KelatoVIT Performance Powder from Kelato is a vitamin and mineral supplement that also can be found in pelleted form. Vitamins and minerals assist in performance, recovery, and overall health.
Kentucky Solution (Equine America)
ExerciseExercise
HealthHealth
JointsJoints
PerformancePerformance
Kentucky Solution from Equine America is a supplement that is meant to support joint health. It is also intended to assist with inflammation from exercise and cartilage health.
LAM Essentials (EquiFeast)
CalmingCalming
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
VitaminsVitamins
LAM Essentials by EquiFeast is a mineral and vitamin supplement. It is intended for horses at risk for metabolic problems. It contains chelated calcium which is meant to optimize behaviour, hormones, and neurotransmitter support.
Lamina Formula (Life Data)
FiberFiber
Hoof HealthHoof Health
Mineral BalanceMineral Balance
NutrientsNutrients
Lamina Formula by Life Labs is intended to support the laminae of horses with acute or chronic laminitis. It provides protein, vitamins and minerals to support hoof health.
LaminaSaver (Figuerola Labs)
AntioxidantAntioxidant
Bone HealthBone Health
HealthHealth
RecoveryRecovery
LaminaSaver by Figuerola Labs is a powdered supplement designed to support bone health. It is formulated with biotin, antioxidants, and methionine.
Laminex (MVP)
AntioxidantAntioxidant
CirculationCirculation
JointsJoints
Metabolic SyndromeMetabolic Syndrome
Laminex by MVP is a pelleted supplement meant to help support healthy joint function, blood sugar levels, and hoof growth. It contains MSM, magnesium, biotin, and devil's claw.
Lamivite (Equestrizone)
AntioxidantAntioxidant
Gut HealthGut Health
HindgutHindgut
NutrientsNutrients
Lamivite from Equestrizone is a blend of naturally sourced antioxidants and micronutrients to support a high fibre, low concentrate diet. It supports healthy stomach and hindgut functions in horses.
Large Alfalfa Bermuda Pellets (DuMOR)
FiberFiber
ForageForage
Gut HealthGut Health
ProteinProtein
Large Alfalfa Bermuda Pellets by DuMor are forage pellets for horses at maintenance or in work. Alfalfa supports digestive health and is a source of protein and calcium.
Leading Edge – Pelleted (Brooks)
AntioxidantAntioxidant
Competition HorsesCompetition Horses
PerformancePerformance
PrebioticPrebiotic
Leading Edge Pelleted by Brooks is a feed intended for horses in heavy training and competition.
Leading Edge – Textured (Brooks)
AntioxidantAntioxidant
Competition HorsesCompetition Horses
PerformancePerformance
PrebioticPrebiotic
Leading Edge - Textured by Brooks is a feed and is intended for horses in competition or training.
Legacy 16% Mare & Foal Ration (CO-OP)
FoalFoal
GrowthGrowth
LactationLactation
MareMare
Legacy 16% Mare & Foal Ration is a higher-protein feed intended for broodmares and growing foals. These horses benefit from higher levels of amino acids in the diet.
Legacy Pellets (Select The Best)
AntioxidantAntioxidant
Bone HealthBone Health
JointsJoints
PerformancePerformance
Legacy Pellets by Select The Best is a pelleted supplement that intends to provide support for joints, connective tissue and soft tissue. It contains glucosamine HCI, MSM, chondroitin sulphate, and yucca.
Lifeforce Elite Performance (Alltech)
JointsJoints
PerformancePerformance
RecoveryRecovery
StressStress
LifeForce Elite Performance by Alltech is a powdered supplement intended to support complete wellness in performance horses.
Liquid Motion (AniMed)
AntioxidantAntioxidant
HealthHealth
JointsJoints
NutrientsNutrients
Liquid Motion from AniMed is a liquid supplement that aims to provide nutrients to help with joint health, structure, and function. It also helps with connective tissue health and contains antioxidants.
Lite (Triple Crown)
FiberFiber
HealthHealth
Metabolic SyndromeMetabolic Syndrome
Weight IssuesWeight Issues
Triple Crown Lite is a palatable, low-calorie, high-fiber pellet fortified with vitamins and minerals. This feed is intended for horses or ponies prone to laminitis and insulin resistance and tends to gain weight easily. This feed has an NSC of 9.5%.
Llama Concentrate Pellet (Bar Ale)
FiberFiber
HealthHealth
NutritionNutrition
VitaminsVitamins
Llama Concentrate Pellet is a pelleted feed intended for llamas of all ages. It contains 18% protein, 2.9% fat, and 18.5% fiber.
Longevity (McCauley’s Equine Formulas)
Gut HealthGut Health
SeniorSenior
StressStress
Weight IssuesWeight Issues
Longevity is a pelleted horse feed targeted to senior and stressed horses. It is designed to support body condition and gut health in senior horses.
LoosenUP (Kelato)
AntioxidantAntioxidant
Mineral BalanceMineral Balance
RecoveryRecovery
VitaminsVitamins
LoosenUP from Kelato is a supplement that provides antioxidants in a blend of vitamin E and C, selenium, magnesium, and chromium. It is meant to assist horses during illness, stress, and recovery from injuries or exercise.
Low ‘N Steady (Buckeye)
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
NutrientsNutrients
SeniorSenior
Low 'N Steady by Buckeye is a low NSC (8.5%) ration balancer intended for mature horses, and metabolic horses or ponies.
Low Starch (Triple Crown)
Complete FeedComplete Feed
Grain FreeGrain Free
Metabolic SyndromeMetabolic Syndrome
SeniorSenior
Triple Crown Low Starch is a pelleted feed containing a lower level of 13.5% NSC. It has no corn, molasses or alfalfa meal which can cause excitability in horses.
Low Starch Omega Plus (Equine Advantage)
Caloric EnergyCaloric Energy
FatFat
FiberFiber
NutritionNutrition
Low Starch Omega Plus is intended for horses that need moderate to significant calories added to their diet. This diet is suitable for horses with Insulin Resistance, Cushing's Disease, and PSSM due to the low NCS.
Magnify (Dove Performance Nutrition)
FatFat
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Magnify from Dove Performance Nutrition is a pelleted ration that contains minerals, vitamins, and higher levels of fat. It is made for any class of horse.
Magnify HF – High Fat (D&D Nutrition)
FatFat
ForageForage
NutritionNutrition
Omega 3-6-9Omega 3-6-9
Magnify HF - High Fat by D&D Nutrition is a pelleted feed with an elevated level of fat, fibre, and protein intended for horses of all life stages. It contains energy sources such as alfalfa, rice bran, and coconut meal.
Majesty’s Flex HA Wafers (Majesty’s Animal Nutrition)
GrowthGrowth
JointsJoints
PerformancePerformance
SeniorSenior
Majesty's Flex HA Wafers are meant to support joint health in horses. It contains glucosamine, MSM, chondroitin sulfate, yucca extract, ascorbic acid, and sodium hyaluronate.
Mare & Foal (Ace Hi Feeds)
BroodmareBroodmare
FoalFoal
GrowthGrowth
NutritionNutrition
Mare & Foal by Ace Hi Feeds is a supplemental feed intended for growing, gestating and lactating horses. It contains at least 16% protein from sources such as soybean meal, whey, and dried distillers grains.
Mare & Foal (Kelley’s Feed)
BroodmareBroodmare
FoalFoal
GrowthGrowth
NutritionNutrition
Mare & Foal by Kelley's Feed is a supplemental feed intended for growing, gestating, and lactating horses. It is a barley-based feed that contains at least 16% protein, added vitamins, and a blend of organic and inorganic minerals.
Mare & Foal (Running Horse Elite Equine Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Running Horse Elite Mare & Foal is a high-fat feed that contains 16% protein and 9% fat from sources such as wheat middlings, rice bran, and soybean oil. This feed is targeted at pregnant, lactating, and growing horses.
Mare’s Milk Plus (Buckeye)
EnergyEnergy
FoalFoal
NutritionNutrition
ProteinProtein
Mares Milk Plus is a powdered milk replacer for nursing, orphaned or rejected foals. It contains digestible, whey-based proteins to minimize digestive upset and is fully fortified.
MareKare (AniMed)
BroodmareBroodmare
LactationLactation
NutrientsNutrients
VitaminsVitamins
MareKare from AniMed is a made for pregnant and lactating mares. This vitamin and mineral supplement is meant to provide extra nutrients and help maintain body condition during breeding, foaling, and lactating.
Materna (Sollio Agriculture)
GrowthGrowth
HealthHealth
MareMare
NutritionNutrition
Materna is a pelleted feed intended for broodmares during lactation and gestation. This feed is intended to promote the development of the fetus. Materna contains 16% crude protein.
Mature Horse (Bar Ale)
Complete FeedComplete Feed
JointsJoints
NutritionNutrition
SeniorSenior
Mature Horse is intended to support overall health and nutrient requirements for an adult to a senior horse. It contains glucosamine which is meant to support joint health.
Mature Horse Plus (Bar Ale)
Complete FeedComplete Feed
JointsJoints
NutritionNutrition
SeniorSenior
Mature Horse Plus is a pelleted feed formulated for older horses. It is intended to help maintain condition. It contains glucosamine and chondroitin to help support joint health.
Maximum E & SE (Cox Vet Lab)
AntioxidantAntioxidant
ImmunityImmunity
MuscleMuscle
VitaminsVitamins
Maximum E & SE is a liquid supplement intended to support healthy muscle, nerve, and reproduction functions. It is ideal for performance and working horses.

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