Date published: 2025-9-13
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Horse Vitamin C product group 390403
UltraCruz® Equine Vitamin C: Horse supplement to help neutralize free radical damage.
UltraCruz® Equine Vitamin C: Horse supplement to help neutralize free radical damage.

Vitamin C for Horses – UltraCruz®

by Santa Cruz Animal Health
5.0(46)
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Horse antioxidant supplement containing Vitamin C to help neutralize free radical damage and promote optimal health
    • Equine antioxidant supplement to support collagen and proteoglycans growth while promoting healthy hair coat, and growth
    • Contains Vitamin C to help promote a healthy immune system
    • Ideal for horses at all life stages and performance levels
    • Provides Vitamin C as an easy to use pellet; also available in pure powder form
    • Developed and manufactured in the USA with globally-sourced ingredients by Santa Cruz Animal Health
    • Highly recommended by others, see testimonials in tab below
    • Same day shipping on orders received before 3:30 PM Central Time Monday-Friday.
    • DISCOUNT: Bulk orders of UltraCruz® Animal Health products totaling $500 or more receive a 5% discount.
Catalog #DescriptionPriceQtyAutoshipCARTFAVORITES
sc-516465
4 lb, pellet, 32 day supply Vitamin C
$14.95Autoship: $14.20
sc-520111
2 x 4 lb, pellet, 64 day supply Vitamin C
$27.81Autoship: $26.42
sc-516466
10 lb, pellet, 80 day supply Vitamin C
$29.95Autoship: $28.45
sc-363246
1 lb, powder, 50 day supply Vitamin C
$19.95Autoship: $18.95
sc-520112
1 each 2.5 lb Vitamin B-1, 4 lb Vitamin B-12 and 4 lb Vitamin C
$41.71Autoship: $39.62
Save 5% with Autoship Logo

Click product's Autoship icon - choose frequency and receive 5% DISCOUNT at Checkout.

* Autoship only available in the US

Why Autoship?

Never forget a shipment so you're always stocked.

Saves you 5% on UltraCruz® products.

You manage the frequency or cancellation to fit your needs.

US: Free shipping within the contiguous US on orders over $75. Alaska and Hawaii, please contact Customer Care for shipping fees.
Outside of US: Shipping fee $20 USD. Free shipping on orders over $100 USD.

UltraCruz® Equine Vitamin C Supplement for Horses

  • Excellent source of antioxidants
  • Can promote healthy joints
  • Can promote Iron absorption
  • Can support a healthy immune system

UltraCruz® Equine Vitamin C Supplement for Horses provides natural antioxidant and immune support for horses. Vitamin C helps promote cartilage development and support healthy concentrations of other important elements, such as Iron. It works closely with Selenium and Vitamin E to support the immune system. This high quality Vitamin C supplement is provided as a palatable pellet or pure powder.

Vitamin C for Horses - A single blonde horse on San Juan Ranch

For a comprehensive antioxidant formula, we recommend feeding horses UltraCruz® Equine Antioxidant Supplement for Horses.

What is an antioxidant?

Antioxidants such as Vitamin C, Vitamin E and Selenium are substances that neutralize free radicals to support healthy tissues and organs on a cellular level. Antioxidant support is recommended for horses subject to rigorous exercise and may help to reduce the negative effects of oxidative stress.

What is a free radical?

Free radicals are highly reactive chemicals with the potential to cause damage to cells. Free radicals can be produced naturally by the body during times of heavy exercise.

References:

  1. Dietary Supplements of Vitamins E, C, and β-Carotene to Reduce Oxidative Stress in Horses: An Overview.  |  Garcia, EIC., et al. 2022. J Equine Vet Sci. 110: 103863. PMID: 35017039
  2. Oral administration of ascorbic acid to horses  |  D. H. SNOW, S. P. GASH, J. CORNELIUS. 1987. Equine Vetreinary Journal BEVA. Vol 19, Issue 6: 520-523.
  3. Equine urine pH: normal population distributions and methods of acidification  |  T. WOOD, T. J. WECKMAN, P. A. HENRY, S.-L. CHANG, J. W. BLAKE, T. TOBIN. 1990. Equine Vetreinary Journal BEVA. Vol 22, Issue 2: 118-121.
  4. Effects of orally administered ascorbic acid on the athletic performance in Arab horses  |  M Mashayekhi, M.H Khayat-Nouri, A Hassanpour, B Amoghli-Tabrizi. 2008. Journal of Veterinary Clinical Pathology. Vol 2, Issue 6: 145-151.
  5. Measurement of ascorbic acid concentration and glutathione peroxidase activity in biological samples collected from horses with recurrent airway obstruction  |  Rachel H. H. Tan BVSc, MS, Craig D. Thatcher DVM, PhD, Virginia Buechner-Maxwell DVM, MS, Undine Christmann DVM, PhD, Mark V. Crisman DVM, MS, and Stephen R. Werre PhD. 2010. American Journal of Veterinary Research. VOL 71, Issue 12.
  6. The absorption of natural vitamin C in horses and anti-oxidative capacity: a randomised, controlled study on trotters during a three-month intervention period  |  Winther, K.; Kharazmi, A.; Hansen, A.S.V.; Falk-Rønne, J. 2012. Comparative Exercise Physiology. Vol 8, Issue 3-4: 195-201.
  7. Effect of packing on changes in erythrocyte osmotic fragility and malondialdehyde concentration in donkeys administered with ascorbic acid: original research  |  Folashade Olaifa, Joseph O. Ayo, Suleiman F. Ambali and Peter I. Rekwot. 2012. Onderstepoort Journal of Veterinary Research. Vol 79, No 1.
  8. Erythrocyte Osmotic Fragility and Hematological Responses of Horses Administered Ascorbic Acid and Exposed to Road Transportation  |  Lukuman Surakat Yaqub DVM, MSc, Wayuta Philip Mshelia DVM, MSc, Joseph Olusegun Ayo DVM, MSc, PhDa. 2014. Journal of Equine Veterinary Science. Vol 34, Issue 11-12: 1324-1328.
  9. Vitamin C in equine nutrition.  |  Mirowski, A. 2016. Życie Weterynaryjne. Vol 91 No 4: 246-247.

Pellet vs. Powder Supplement Formulations

UltraCruz® Supplements are now available in pelletized formulations. By using pellets, rather than powder, we have been able to:

Vitamin C for Horses - Piles of Equine Supplement pellets
  • Ensure stability of active ingredients
  • Maximize product freshness
  • Reduce waste

All San Juan Ranch performance and breeding horses use UltraCruz® Equine pelletized products.

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Just how stabilized is the vitamin C in these pellets? How long after manufacture does the vitamin C start to degrade and will keeping them in the refrigerator extend the time that the vitamin c will remain stabilized?

Asked by: drrmarie
Hello, This product usually lasts a year. It is best to store this in a cool, dry place for optimal results.
Answered by: SCAH Representative
Date published: 2023-01-05

What is the serving size and how many IUs? I want to feed 5000 IU per day. 

Asked by: Terri
Hello, The recommended serving size is a total of 56 grams/day. (2 scoops at 28 grams each) There is a total of 180,000 IU’s per daily serving (90,000IU/scoop). Thank you, SCAHealth
Answered by: SCAH Representative
Date published: 2022-02-28

What if your horse is at a barn that only feeds once a day? Could giving my horse 2 scoops of the pellets once a day be harmful to him?

Asked by: LouCoder
Thank you for inquiring with Santa Cruz Animal Health. This product is labelled to be fed at a rate of 1 scoop per 1000 lb horse twice daily. We would recommend consulting with your veterinarian prior to making any dietary changes.
Answered by: SCAH Rep
Date published: 2020-12-14

I will need to get 16000 mg in my horse per day what is the milligram dosing in this package

Asked by: Susan
Hello! Both the powder and the pellets contain 9,000 mg of Ascorbic Acid per serving (which is 2 scoops). Each scoop contains about 4,500 mg. If you are looking to supplement the 16,000, which is over our recommended dosage, you would need about 3.5 scoops of supplement. We recommend consulting a vet before supplementing anything.
Answered by: SCAH Rep
Date published: 2019-11-26

What form is this vit c in? 

Asked by: Hannah
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Rated 5 out of 5 by from Amazing!!!After looking at my horses coat and some minor skin issues, I decided to start him on Vitamin C! Especially with his older age of 23, I wanted to make sure he continued to look well! Within a month of starting, the vet was absolutely blown away by how well his coat looks. His minor skin stuff disappeared too! Great product. Will forever use and recommend
Date published: 2023-09-16
Rated 5 out of 5 by from Makes Vitamin C supplementation so easy!I have a picky horse who leaves all powdered supplements behind in his feeder! He cleans up the Ultra Cruz Vitamin C Supplement .....I use it in combination with Natural Vitamin E and Selenium for muscle building ....works great!
Date published: 2019-06-20
Rated 5 out of 5 by from Vitamin CI've been buying Santa Cruz vitamin C for 2 years to boost my horses immunity during the hot summer months in Florida. It helps his skin with bug bites and skin allergies and decreases his scratching and rubbing. Great product.
Date published: 2021-04-24
Rated 5 out of 5 by from A Winter StapleHopefully, in older horses, added Vitamin C fills in where their ability to generate Vitamin C diminishes with age. The UltraCruz® Equine Vitamin C product is also the most cost effective when compared to other like-products.
Date published: 2017-01-01
Rated 5 out of 5 by from Great quality!I use this for added immune support for my mare who has seasonal allergies. Quality is great and love that I can buy it in large quantities. Shes a picky eater but loves this! Great price too!
Date published: 2022-06-09
Rated 5 out of 5 by from Pelleted version is the Bomb!Got this for my horse who has Myopathy and combine it with the Natural E and Selenium supplement......he is asuper picky eater and eats all of this! Has really helped him put on muscle....
Date published: 2021-11-29
Rated 5 out of 5 by from Easy and AffordableVet recommended adding vitamin C as an immune booster. This product is very affordable and the pelleted version is so easy to feed. My horse eats it right up without any waste.
Date published: 2017-09-24
Rated 5 out of 5 by from UltraCruz Equine Vitamin C -- Great product!!!!I have been using this product now for a couple of months. I have seen a difference in boosting my mule's immune system! Easy to feed pellets and she likes the taste!
Date published: 2018-03-07
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Vitamin C for Horses – UltraCruz is rated 5.0 out of 5 by 47.
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