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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.
Solutions 12 Textured (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 12 Textured is a complete feed with 12% protein and 6% fat. It is formulated using corn, oats, barley, and wheat as energy sources. It also contains soybean as a protein source and soybean oil as a fat source.
Solutions 14 Cube (Right Choice)
Complete FeedComplete Feed
FiberFiber
NutritionNutrition
ProteinProtein
Right Choice Solutions® 14 Cube is a cubed feed with 14% protein intended for horses in work and at maintenance. It provides protein from alfalfa meal and extruded soybeans.
Solutions 14 Low Starch Pellet (Right Choice)
Complete FeedComplete Feed
FiberFiber
Low NSC FeedsLow NSC Feeds
NutritionNutrition
Solutions 14 Low Starch is a pelleted complete feed that contains 14% protein and 7% fat. It is formulated for working and maintenance horses and is marketed as a low NSC feed.
Solutions 14 Pellet (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 14 Pellet is a complete feed with 14% protein and 6% fat intended for horses at maintenance or in work. It utilizes alfalfa meal and extruded soybeans for protein.
Solutions 14 Textured (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 14 Textured is a complete feed containing 14% protein from soybean and alfalfa meal and 6% fat from soybean oil. It contains whole oats, cracked corn, wheat middling's, and molasses as energy sources.
Sport Horse Grass (Uckele)
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
Sport Horse Grass is a pelleted vitamin, mineral, and amino acid supplement intended for performance horses consuming a grass-based diet. This supplement is intended to support muscular function, joint/tendon maintenance, and recovery.
Stabul 1 (Anderson Feed Co)
Easy KeeperEasy Keeper
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Weight IssuesWeight Issues
Stabul™ 1 is a low-starch (5%) and low-sugar (5%) feed intended for easy keepers and horses, ponies and mules with metabolic concerns. It is corn, oats and molasses-free.
Stabul 1 Plus (Anderson Feed Co)
ExerciseExercise
Metabolic SyndromeMetabolic Syndrome
NutritionNutrition
Weight IssuesWeight Issues
Stabul™ 1 Plus is a low-starch (5%) and low-sugar (5%) feed intended for horses that are in work or hard keepers. It is designed for horses with metabolic concerns to provide higher energy density.
Stake Horse (Woody’s Horse Nutrition)
Competition HorsesCompetition Horses
DigestionDigestion
FiberFiber
PerformancePerformance
Stake Horse by Woody’s Horse Nutrition is a beet-based 9% fat and 13% protein feed intended for racehorses. It is made with molasses, oats, barley, and beet pulp. This horse is intended for racehorses or performance horses.
Stamm 30 (Hallway)
BroodmareBroodmare
FoalFoal
GrowthGrowth
StallionStallion
Stamm 30 from Hallway is a vitamin and mineral pellet formulated for growing, reproducing, recreational and performance horses. This can be fed alone to easy keepers, or used to top dress feed for horses not getting the full feeding rate of concentrate feeds. Stamm 30 is used in other Hallway feeds as the source of vitamins and minerals.
Starch Wise (ProElite)
Gut HealthGut Health
NutritionNutrition
PerformancePerformance
SeniorSenior
ProElite Starch Wise is a pelleted horse feed with a maximum 14.5% NSC. It is formulated with moderate levels of starch and sugar for mature show and performance horses.
Stock Builder (Star Milling Co)
ExerciseExercise
GrowthGrowth
MuscleMuscle
ProteinProtein
Stock Builder by Star Milling Co is a high protein supplement formulated with ingredients such as soybean meal, ground cereal grains and whey. It contains a minimum of 25% protein and no added minerals and vitamins.
Strucomix Senior (Cavalor)
Complete FeedComplete Feed
DigestionDigestion
FiberFiber
SeniorSenior
Strucomix Senior by Cavalor is a high-fibre feed formulated with puffed and extruded grains to improve digestibility. It contains 14% protein that help support weight and muscle maintenance.
SU-PER Anti-Oxidant Powder (Gateway Products)
AntioxidantAntioxidant
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
SU-PER Anti-Oxidant Powder by Gateway Products is an anti-oxidant supplement anti-oxidant to support general health, energy production, and immune response for horses under stress or recovering from illness.
SU-PER C Powder (Gateway Products)
Amino AcidAmino Acid
RecoveryRecovery
StressStress
VitaminsVitamins
SU-PER C Powder by Gateway Products is a supplement that contains vitamin C that can provide anti-oxidant support to horses. It may help support respiratory health, cardiovascular function, and the immune system.
SU-PER Farrier’s Supplement Pellets (Gateway Products)
Amino AcidAmino Acid
Hoof HealthHoof Health
ProbioticProbiotic
VitaminsVitamins
SU-PER Farrier's Supplement Pellets by Gateway Products is a hoof supplement with 25mg of Biotin per serving. This supplement supports healthy hoof growth and structure.
SU-PER Form Pellets (Gateway Products)
HealthHealth
Mineral BalanceMineral Balance
ProbioticProbiotic
VitaminsVitamins
SU-PER Form Pellets by Gateway Products is a vitamin and mineral supplement that provides all the necessary nutrients. This supplement also includes additional amino acids and electrolytes and is meant for horses of all life stages.
SU-PER GastroShield Powder (Gateway Products)
Gut HealthGut Health
NutrientsNutrients
ProbioticProbiotic
UlcersUlcers
SU-PER GastroShield Powder by Gateway Products is a gut supplement meant to soothe the stomach from gastric acid upset. This supplement is for horses with a history of gastric ulcers or those at risk of developing gastric issues.
SU-PER Glucosamine C.S. Liquid (Gateway Products)
ExerciseExercise
JointsJoints
RecoveryRecovery
SeniorSenior
SU-PER Glucosamine C.S. Liquid by Gateway Products is a joint supplement that includes glucosamine and chondroitin sulphate to support connective tissues and joint function. This supplement can be used for maintenance and repair.
SU-PER Glucosamine C.S. Powder (Gateway Products)
ExerciseExercise
JointsJoints
RecoveryRecovery
SeniorSenior
SU-PER Glucosamine C.S. Powder by Gateway Products is a joint supplement that includes glucosamine and chondroitin sulphate to support connective tissues and joint function. This supplement can be used for maintenance and repair.
SU-PER ImmunoBOOST Powder (Gateway Products)
AntioxidantAntioxidant
HerbHerb
ImmunityImmunity
NutrientsNutrients
SU-PER ImmunoBOOST Powder by Gateway Products is an immune supplement of anti-oxidants, vitamins and minerals, and herbal extracts. This supplement is for seniors, performance, and horses under consistent stress.
SU-PER Jug Paste (Gateway Products)
Amino AcidAmino Acid
EnergyEnergy
PerformancePerformance
VitaminsVitamins
SU-PER Jug Paste is an energy supplement meant to provide stamina, performance, and energy. This supplement offers vitamins and minerals, electrolytes, and amino acids to ensure proper nutrient levels before a race or restore balance.
SU-PER LaminAid Powder (Gateway Products)
Amino AcidAmino Acid
HerbHerb
Hoof HealthHoof Health
VitaminsVitamins
SU-PER LaminAid Powder by Gateway Products is a circulation supplement designed for horses suffering from laminitis/founder or at risk. This supplement helps to increase blood flow, support inflammatory responses, and provide nutrients to damaged tissues.
SU-PER Leanabolic Powder (Gateway Products)
ExerciseExercise
MuscleMuscle
PerformancePerformance
ToplineTopline
SU-PER Leanabolic Powder is a performance supplement to support exercising muscle. It contains essential amino acids to build and maintain lean muscle mass, Kre-Alkalyn to increase stamina and recovery, and vitamins and minerals to replenish lost nutrients.
SU-PER Meta-Balance Powder (Gateway Products)
Hoof HealthHoof Health
MetabolismMetabolism
Metabolic SyndromeMetabolic Syndrome
NutrientsNutrients
SU-PER Meta-Balance Powder is a supplement meant to support blood-glucose levels for healthy metabolic regulation. This supplement provides vitamins and minerals that help to maintain proper metabolism.
SU-PER PowerFlex H.A. Powder (Gateway Products)
HerbHerb
JointsJoints
RecoveryRecovery
VitaminsVitamins
SU-PER PowerFlex H.A. Powder by Gateway Products is a joint supplement containing antioxidants, joint nutrients, and hyaluronic acid. This supplement also helps to support the structural integrity of connective tissues.
SU-PER PulmoShield Paste (Gateway Products)
HerbHerb
NutrientsNutrients
RespiratoryRespiratory
VitaminsVitamins
SU-PER PulmoShield Paste is a respiratory supplement that supports pulmonary and respiratory function. This supplement includes ingredients that intend to aid in minimizing the occurrence of EIPH (Exercise Induced Pulmonary Hemorrhaging).
SU-PER Show Coat Powder (Gateway Products)
Coat QualityCoat Quality
Mineral BalanceMineral Balance
Skin + HairSkin + Hair
VitaminsVitamins
SU-PER Show Coat Powder is a supplement that supports a healthy coat and skin. This supplement contains flaxseed meal as a source of essential fatty acids and additional vitamins and minerals for better nutrient absorption.
SU-PER Sound Liquid (Gateway Products)
ExerciseExercise
JointsJoints
NutrientsNutrients
RecoveryRecovery
SU-PER Sound Liquid by Gateway Products is a supplement to support joint, ligament, and tendon health. This supplement contains glucosamine, MSM, and bromelain to help maintain healthy joint function.
SU-PER Sound Plus Powder (Gateway Products)
FlavorFlavor
JointsJoints
NutrientsNutrients
VitaminsVitamins
SU-PER Sound Plus Powder by Gateway Products is a supplement to support and maintain healthy joint function, and it aids the structural integrity of connective tissues. This supplement contains elevated levels of MSM, hyaluronic acid, and chondroitin sulphate.
SU-PER Sound Powder (Gateway Products)
HealthHealth
JointsJoints
NutrientsNutrients
RecoveryRecovery
SU-PER Sound Powder by Gateway Products is a supplement to support joint, ligament, and tendon health. This supplement contains glucosamine, MSM, and bromelain to help maintain healthy joint function.
Summer Heat (Woody’s Horse Nutrition)
Competition HorsesCompetition Horses
DigestionDigestion
FiberFiber
PerformancePerformance
Woody’s Summer Heat is a complete feed formulated for performance horses in heavy to intense work. It contains 12.5% protein and 7.0% fat, and is made with oats, barley, molasses and beet pulp.
Summit Active (Hubbard Feeds)
GrowthGrowth
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
Summit Active from Hubbard is a concentrated feed intended for performance horses. It provides 14% crude protein and contains grains, plant proteins, forage products, and vegetable oil.
Summit Senior (Hubbard Feeds)
Coat QualityCoat Quality
Gut HealthGut Health
NutrientsNutrients
SeniorSenior
Summit Senior from Hubbard is a complete feed intended for senior horses at maintenance with dental issues. It contains 14% crude protein and provides digestible energy and protein from mostly forage sources.
Summit® Classic + (Hubbard Feeds)
Complete FeedComplete Feed
Gut HealthGut Health
ImmunityImmunity
NutrientsNutrients
Summit Control+ from Hubbard is a concentrated feed intended for horses at multiple life stages and work levels. It contains 12% crude protein and energy sources from grain products, plant proteins, and forage.
Sunshine Plus Pelleted Horse Feed (Blue Seal)
Complete FeedComplete Feed
ProteinProtein
VitaminsVitamins
YeastYeast
Sunshine Plus is a high protein (30%) pelleted feed containing soybean meal and whey. Energy sources include cane molasses, wheat middlings, oil, and corn distillers grains.
Super 16 (Hallway)
BroodmareBroodmare
GrowthGrowth
LactationLactation
NutritionNutrition
Super 16 is a textured sweet feed fortified with Stamm 30 formulated for growing horses and broodmares in peak lactation. This feed uses whole and rolled grains with molasses as energy sources. Super 16 contains 16% protein, 3.5% fat, and 9% fibre.
Super Horse Manna Senior (Manna Pro)
DentalDental
NutritionNutrition
SeniorSenior
Weight IssuesWeight Issues
Super Horse Manna Senior from Manna Pro is a beet pulp-based feed designed for senior horses. It contains 12.5% crude protein, 4% crude fat, 18% dietary starch, 7% sugars, and a mix of organic and inorganic trace minerals.
Super Weight Gain (Horse Guard)
Coat QualityCoat Quality
HealthHealth
NutritionNutrition
Weight IssuesWeight Issues
Super Weight Gain by Horse Guard, is a supplement intended for healthy weight gain and enhancing coat condition. This supplement contains full-fat soybeans, prebiotics, probiotics and a vitamin mineral package.
SuperFibra Integri-T (Purina Canada)
Complete FeedComplete Feed
ExerciseExercise
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
SuperFibra Integri-T is a complete feed designed for horses that require a reduced NSC diet and are at maintenance or in light work. SuperFibra Integri-T does not contain corn, oats, barley, or molasses.
SuperFibra Integri-T (Purina)
ExerciseExercise
FiberFiber
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
SuperFibra Integri-T has a low NSC content (10%) which can be fed to horses that require a low starch/sugar diet. SupreFibra Integri-T is a pelleted feed that is designed for horses who are insulin resistant or have a history of tieing up.
Superforce (Cavalor)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
EnergyEnergy
PerformancePerformance
Cavalor Superforce is a high-calorie textured feed intended for performance horses during competition. It provides energy from high NSC (sugar and starch) sources including oats and cane molasses.
Supple & Senior Balancer (Spillers Feeds)
JointsJoints
NutritionNutrition
Ration BalancerRation Balancer
SeniorSenior
Supple & Senior Balancer from Spillers Feed contains amino acids, vitamins, and minerals to balance the diet. This feed is intended for senior horses and ponies to balance the diet and support joint health. The NSC content makes it suitable for horses and ponies prone to laminitis.
Support One (Pureform)
AntioxidantAntioxidant
JointsJoints
Mineral BalanceMineral Balance
VitaminsVitamins
Pureform Support One is an equine supplement formulated to support joint, bone, and immune health. It contains Glucosamine, MSM, amino acids, complete vitamins, trace minerals, and anti-oxidants.
SUPREME™ 10 Pelleted Feed (BUCKEYE Nutrition)-[Discontinued]
Complete FeedComplete Feed
Gut HealthGut Health
HealthHealth
Ration BalancerRation Balancer
SUPREME™ 10 Pelleted Feed is a now-discontinued feed that provided 10% crude protein in a fortified grain mix. It was formulated to support the nutritional needs of mature horses.
SUPREME™ 14 Pelleted Feed (BUCKEYE Nutrition)
Complete FeedComplete Feed
Gut HealthGut Health
NutritionNutrition
Ration BalancerRation Balancer
SUPREME 14 Pelleted Feed by Buckeye Nutrition is a complete feed with 14% crude protein. It is formulated to support the nutritional needs of mature horses in light to moderate work, seniors, and the breeding herd. SUPREME 14 contains a total of 28% NSC.
Surge Paste (Bluebonnet Feeds)
CirculationCirculation
CardiovascularCardiovascular
Hoof HealthHoof Health
RespiratoryRespiratory
Surge Paste by Bluebonnet Feeds is a paste supplement intended to support lung health and circulation in horses.
Surge Powder (Bluebonnet Feeds)
CirculationCirculation
Hoof HealthHoof Health
RespiratoryRespiratory
StressStress
Surge Powder by Bluebonnet Feeds is a powdered supplement intended to support blood circulation and lung health in horses experiencing intense work or stress.
Suspensory Saver (Figuerola Laboratories)
AntioxidantAntioxidant
HerbHerb
JointsJoints
RecoveryRecovery
Suspensory Saver by Figuerola Laboratories is a natural supplement designed to support tendon and ligament health. Formulated with collagen, MSM, and vitamin C, it helps promote cellular integrity and supports recovery.
Sustaina (Mitavite)
EnergyEnergy
ExerciseExercise
Gut HealthGut Health
PerformancePerformance
Sustaina by Mitavite is a micronized feed intended to provide fast release energy to race horses and horses in heavy work.

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