Date published: 2026-6-10

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Vitamin C for Horses – UltraCruz®

by Santa Cruz Animal Health
5.0(48)
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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 in-stock items ordered before 3:00 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
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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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