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Ascorbic Acid (Vitamin C Supplement)

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.

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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.
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.
Grand Circuit (Masterfeeds)
Complete FeedComplete Feed
EnergyEnergy
ExerciseExercise
PerformancePerformance
Masterfeeds Grand Circuit (texturized) is intended for performance horses such as barrel racers, eventers, and racehorses. It provides higher energy density with 7% fat from soy oil and fat nuggets.
Grand Complete (Grand Meadows)
Gut HealthGut Health
HealthHealth
ImmunityImmunity
JointsJoints
Grand Complete is an all-in-one supplement intended to provide support to hooves, joints, and the digestive system. This supplement contains glucosamine HCl and MSM intended to provide joint support.
Grand Premium Plus (Grand Meadows)
Complete FeedComplete Feed
Hoof HealthHoof Health
JointsJoints
NutritionNutrition
Grand Premium Plus is a complete feed for horses that provides vitamins, minerals, and amino acids, as well as ingredients for joint support and digestion. Ideal for horses and ponies of all ages and work levels.
Grand Slam (Equi-lete)
Easy KeeperEasy Keeper
Gut HealthGut Health
HealthHealth
Ration BalancerRation Balancer
Grand Slam by Equi-lete is a pelleted ration balancer intended for easy keepers and horses on forage-based diets.
Grand Vite (Grand Meadows)
HealthHealth
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
ProteinProtein
Grand Vite by Grand Meadows is an equine digestive supplement targeted for all horse types. It contains vitamins, trace minerals, and Dried Saccharomyces Cerevisiae Postbiotic Fermentation Product at an undisclosed amount.
Grass Advantage (ProElite)
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
ProElite Grass Advantage is a pelleted ration balancer intended to balance grass and mixed forages. It can be fed to broodmares, growing, performance, and maintenance horses.
GRO ‘N WIN Ration Balancer (BUCKEYE Nutrition)
Easy KeeperEasy Keeper
FiberFiber
Ration BalancerRation Balancer
ToplineTopline
Gro 'N Win is the original Buckeye Nutrition ration balancer that supplies minerals, vitamins and protein. It contains 13% NSC and 32% protein from sources such as soybean meal and alfalfa meal.
GRO ‘N WIN™ ALFA Ration Balancer (BUCKEYE Nutrition)
FiberFiber
GrowthGrowth
Ration BalancerRation Balancer
ToplineTopline
Gro 'N Win Alfa is a Buckeye ration balancer formulated with lower calcium to balance equine diets containing over 75% alfalfa hay. It is designed to provide minerals, vitamins, and proteins and has 18% NSC.
Gro-Fit (Ark Nutrition)
BroodmareBroodmare
Complete FeedComplete Feed
GrowthGrowth
LactationLactation
Gro-Fit by Ark Nutrition is a complete pelleted feed intended for growing horses, pregnant mares, lactating mares, and working horses. It contains various ingredients such as alfalfa meal, soyhulls, and wheat.
Grow Colt (Farnam)
GrowthGrowth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Grow Colt by Farnam is a pelleted vitamin and mineral supplement intended to support the growth and development of foals.
Growth (Equine Advantage)
FoalFoal
GrainsGrains
GrowthGrowth
Omega 3-6-9Omega 3-6-9
Growth is a textured feed formulated for young growing horses under 2 years old. This feed is highly palatable and provides moderate fibre levels from highly digestible sources including shredded beet pulp and soybean hulls.
Growth (Triple Crown)
FoalFoal
GrowthGrowth
LactationLactation
StallionStallion
Triple Crown Growth is a beet-pulp-based feed intended to support healthy growth and joints and meet the needs of broodmares and breeding stallions. It provides 10% fat and 15% crude fiber.
Growth Cubes (Tribute)
Bone HealthBone Health
DigestionDigestion
FatFat
FiberFiber
Tribute Growth Cubes are a cubed complete feed intended for growing horses between 3 months to 2 years and broodmares during gestation and lactation. Growth Cubes are high in protein (16%) and digestible fibre (18%).
Growth Pelleted (Woody’s Horse Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
NutritionNutrition
Woody's Growth Pelleted is a complete pelleted feed formulated for broodmares, foals, and growing horses. It contains added amino acids and chelated trace minerals. This feed contains a maximum of 15% crude fiber.
GROWTH Pelleted Horse Feed (BUCKEYE Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Buckeye GROWTH Pelleted Feed is a horse feed targeted to broodmares and growing horses. It provides higher levels of protein and added lysine.
Growth Pellets (Tribute)
FatFat
FiberFiber
GrowthGrowth
LactationLactation
Tribute Growth Pellet is a 15% NSC pelleted feed intended for broodmares during pregnancy and lactation and growing foals from 3 months to 2 years. It provides higher protein to support development.
Growth Textured (ProElite)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
ProElite Growth Horse Feed is a textured feed intended for foals, growing horses, and broodmares. It provides 16% protein to support development with a maximum NSC of 19.8%.
Growth Textured (Tribute)
Bone HealthBone Health
GrowthGrowth
LactationLactation
ProteinProtein
Tribute Growth Textured is a complete textured feed intended for broodmares during pregnancy and lactation as well as growing horses from 3 months to 2 years. It provides high protein levels which can support growth and is formulated for diets containing less than 50% legume forage.
Growth Textured (Woody’s Horse Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
NutritionNutrition
Woody’s Growth Textured is a complete textured feed formulated for broodmares, stallions, and growing horses. Omega-3 fatty acids is meant to help strengthen immune systems in both mare and foal.
GROWTH Textured Sweet Feed (BUCKEYE Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Growth Textured Sweet Feed by Buckeye is a complete feed designed for broodmares and growing horses. It provides fat, carbohydrates, and proteins from whole oats, soybean hulls, soybean oil and molasses. It contains 24% NSC.
H-Formula (Biopteq)
HealthHealth
ImmunityImmunity
JointsJoints
MuscleMuscle
H-Formula from Biopteq is a pelleted supplement intended for horses who require additional protein in their diet. This supplement is intended to support the maintenance of muscles and tendons.
Hay Replacer Pellets (Kelley’s Feed)
FiberFiber
ForageForage
Hay StretcherHay Stretcher
NutritionNutrition
Kelley's Hay Replacer Pellets is a forage replacement made of alfalfa, bermuda, and mixed grasses. It also contains added molasses, vitamins, and minerals. This pelleted hay replacer is intended for all horses and ponies, especially those who have trouble chewing.
Health Mash (Dodson & Horrell)
FiberFiber
Gut HealthGut Health
HerbHerb
NutritionNutrition
Health Mash by Dodson & Horrell is a supplementary feed meant to support immune and digestive function, with added antioxidants and yeast. The ingredients list includes wheatbran, vegetable oil, and herbs. Health Mash is a molasses-free option.
Healthy Balance Farmland Recipe Horse Feed (Dr. Pol)
Caloric EnergyCaloric Energy
HealthHealth
NutritionNutrition
SeniorSenior
Healthy Balance Farmland Recipe Horse Feed is an extruded feed that intends to enhance coat health and promotes lean muscle growth while supporting senior horses with bad or missing teeth.
Healthy Evolution Farmland Recipe Horse Feed (Dr. Pol)
DentalDental
GrainsGrains
Mineral BalanceMineral Balance
VitaminsVitamins
Healthy Evolution Farmland Recipe Horse Feed is an extruded feed intended to enhance coat health and promote lean muscle growth for pregnant/lactating mares and growing foals.
Healthy Weight (Platinum Performance)
Coat QualityCoat Quality
FatFat
Omega 3-6-9Omega 3-6-9
Weight IssuesWeight Issues
Platinum Healthy Weight is an equine fat supplement containing flaxseed oil and natural Vitamin E in the form of d-Alpha Tocopherol Acetate. This oil is intended to support coat, skin, gastric, and muscle health.
Hempables Wafer (Majesty’s)
HealthHealth
HerbHerb
ImmunityImmunity
Omega 3-6-9Omega 3-6-9
Hempables is a supplement that contains CBD. The product is purported to help with anxiety and discomfort, however, research is needed to evaluate these claims and determine efficacy.
Herbal Respond (DAC)
HealthHealth
HerbHerb
JointsJoints
VitaminsVitamins
Herbal Respond by DAC is a herbal joint supplement designed for mature performance horses. It features antioxidant ingredients that support overall joint well-being and help maintain comfort during training.
Heritage 14% Textured with 5% Fat (Big V Feeds)
BroodmareBroodmare
GrowthGrowth
NutritionNutrition
PerformancePerformance
Heritage 14% Textured with 5% Fat by Big V Feeds is a textured feed formulated for growing horses, stallions, broodmares, mature horses and performance horses.
Heritage 14% Textured with 8% Fat (Big V Feeds)
Complete FeedComplete Feed
FoalFoal
MareMare
PerformancePerformance
Heritage 14% Textured with 8% Fat by Big V Feeds is a feed with a high protein, high fat, and moderate level of fibre. This feed includes ingredients such as oats, soybean meal, and vitamins and minerals.
Heritage 16% Mare & Foal (Big V Feeds)
BroodmareBroodmare
FoalFoal
GrowthGrowth
StallionStallion
Heritage 16% Mare & Foal by Big V Feeds is a pelleted feed intended for growing horses, mares, stallions, mature and performance horses.
Heritage Low Starch Horse Pellets (Big V Feeds)
HealthHealth
NutritionNutrition
PerformancePerformance
SeniorSenior
Heritage Low Starch Pellets by Big V Feeds is a low starch (10%) pelleted feed intended for mares, stallions, senior and performance horses.
Heritage Performance 14% (Big V Feeds)
BroodmareBroodmare
GrowthGrowth
NutritionNutrition
PerformancePerformance
Heritage Performance 14% by Big V Feeds is a pelleted feed intended for growing, breeding, performance and active horses.
Heritage Professional Horse (Pelleted) (Big V Feeds)
BroodmareBroodmare
GrowthGrowth
NutritionNutrition
PerformancePerformance
Heritage Professional Horse (Pelleted) by Big V Feeds is a pelleted feed intended for growing, breeding, performance and active horses.
Heritage Race Horse (14-10) (Big V Feeds)
BroodmareBroodmare
GrowthGrowth
PerformancePerformance
StallionStallion
Heritage Race Horse (14-10) by Big V Feeds is a textured feed formulated with 14% protein and 10% fat. It is intended for growing horses, stallions, mares, mature pleasure and performance horses.
Heritage Ready To Run (Big V Feeds)
Complete FeedComplete Feed
NutrientsNutrients
NutritionNutrition
PerformancePerformance
Heritage Ready To Run by Big V Feeds is a textured feed intended for horses in moderate to heavy work.
Heritage Senior Endurance (Big V Feeds)
HealthHealth
NutritionNutrition
SeniorSenior
StaminaStamina
Heritage Senior Endurance by Big V Feeds is a pelleted feed intended for senior horses.
Heritage Senior Horse Pellets (Big V Feeds)
HealthHealth
NutritionNutrition
PerformancePerformance
SeniorSenior
Heritage Senior Horse Pellets by Big V Feeds is a pelleted horse feed containing 14% protein. It is intended for senior horses, mares, stallions, yearlings, mature pleasure horses in light activity, and performance horses in moderate activity.
Hesperidin C & K (AniMed)
CardiovascularCardiovascular
RecoveryRecovery
RespiratoryRespiratory
VitaminsVitamins
Hesperidin C & K from AniMed contains hesperidin and vitamins. This supplement is meant to help heal injuries such as in the lungs or capillaries. This product also aims to reduce symptoms of hay fever in horses and promote respiratory and cardiovascular health.
Hesteflex (Hestevard)
AntioxidantAntioxidant
JointsJoints
NutrientsNutrients
RecoveryRecovery
Hesteflex by Hestevard is a powdered supplement intended to support the maintenance of joints and tendons in all horse types and disciplines.
High Country Sweet (Kelley’s Feed)
Caloric EnergyCaloric Energy
ExerciseExercise
FlavorFlavor
NutritionNutrition
High Country Sweet by Kelley's Feed is a grain-based feed with added vitamins and minerals. It contains oats, barley, and corn. It is formulated to provide 12% crude protein.
High Endurance (Cox Vet Lab)
Amino AcidAmino Acid
PerformancePerformance
RecoveryRecovery
StaminaStamina
High Endurance is a supplement intended to be given before and after an event to help replace vitamins, minerals, and amino acids lost during performance.
High Impact (Formula 707)
Competition HorsesCompetition Horses
Hoof HealthHoof Health
JointsJoints
VitaminsVitamins
High Impact from Formula 707 is a supplement that is meant to support hoof and joint health. It is intended for competition horses or for conditioning support.
High Impact (HorseLogic) – [Discontinued]
Hoof HealthHoof Health
JointsJoints
MuscleMuscle
PerformancePerformance
High Impact from HorseLogic is a hoof and joint supplement. High Impact contains amino acids and biotin for hoof health, plus MSM, glucosamine, collagen, and chondroitin for joint health.
High Point Pellets (HorseTech)
Gut HealthGut Health
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
High Point Pellets by HorseTech is a pelleted vitamin and mineral supplement formulated to balance forage-based diets and support overall health. It also contains added prebiotics to promote optimal digestive function.
High Point-Alfalfa Hay (HorseTech)
Gut HealthGut Health
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
High Point- Alfalfa from HorseTech is a vitamin and mineral supplement which is designed to be fed in alfalfa-based diets. The 3-ounce feeding rate provides phosphorus and essential vitamins as well as trace minerals.
High Point-Grass/Mixed Hay (HorseTech)
HealthHealth
ProbioticProbiotic
Ration BalancerRation Balancer
VitaminsVitamins
High Point-Grass/Mixed Hay is a vitamin-mineral supplement formulated for horses consuming grass or mixed hay diets. This supplement provides a higher calcium-phosphorous ratio.
High Step (Equi-lete)
Easy KeeperEasy Keeper
Hoof HealthHoof Health
ImmunityImmunity
Skin + HairSkin + Hair
High Step by Equi-lete is a vitamin and mineral supplement intended to support overall health in pleasure horses, easy keepers and non-performance horses.
High VAULTage (Equi-lete)
HealthHealth
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
High VAULTage by Equi-lete is a vitamin and mineral supplement intended to support health, performance and recovery in performance horses and hard keepers.
HistAll H (AniMed)
HealthHealth
ImmunityImmunity
NutrientsNutrients
VitaminsVitamins
HistAll H from AniMed is a supplement meant to help horses suffering from seasonal allergies, to support normal histamine levels and a healthy immune system. It also claims to help combat environmental irritants and pollutants.

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