Date published: 2026-6-10

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Horse Antioxidant Supplement – UltraCruz®

by Santa Cruz Animal Health
4.9(22)
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Horse supplement containing antioxidants to help regulate free radicals and promote cell health
    • Contains Selenium, Vitamin C, and Natural Vitamin E
    • Includes ingredients to help provide antioxidants which help remove damaging free radicals and decrease oxidative damage
    • Intended for performance and working horses
    • Can be beneficial for horses turned out on pastures
    • Easy to use pelleted product, which helps reduce waste associated with supplements in 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-516450
4 lb, pellet, 32 day supply
$39.95Autoship: $37.95
sc-516451
10 lb, pellet, 80 day supply
$94.95Autoship: $90.20
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UltraCruz® Equine Antioxidant Supplement for Horses

  • Contains Selenium, Vitamin C & Vitamin E
  • Helps scavenge free radicals
  • Supports cellular health
  • Helps decrease the negative effects of oxidative stress

UltraCruz® Equine Antioxidant Supplement for Horses is a potent Selenium, Vitamin C and Vitamin E powder formulation that supports healthy tissues and organs. Competition horses have a high energy demand in order to perform their events, and their muscle cells require a large amount of antioxidants.

Selenium and Vitamin E are key antioxidants that work well together to help regulate free radicals produced during exercise. While Selenium is active within the cell, Vitamin E (d-alpha-Tocopherol Acetate), acts within the cell membrane. Selenium also supports a healthy immune system while providing the horse with necessary muscle and joint support. Vitamin E, a fat-soluble vitamin, has been implicated as a cofactor in glucose production and supports a healthy immune system.

Horse Antioxidant Supplement - Teddy Robinson Riding Shiners Diamond Girl

Vitamin C is an antioxidant that works with Vitamin E to protect the tissues of the body, especially those of the respiratory system. Vitamin C also supports production of connective tissues like tendons and ligaments as well as skin, hooves, bones and teeth.

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. Antioxidant supplementation and pulmonary function at rest and exercise.  |  Deaton, CM., et al. 2002. Equine Vet J Suppl. 58-65. PMID: 12405660
  2. Effect of nutritional antioxidant supplementation on systemic and pulmonary antioxidant status, airway inflammation and lung function in heaves-affected horses.  |  Kirschvink, N., et al. 2002. Equine Vet J. 34: 705-12. PMID: 12455842
  3. Antioxidant supplementation and subsequent oxidative stress of horses during an 80-km endurance race.  |  Williams, CA., et al. 2004. J Anim Sci. 82: 588-94. PMID: 14974559
  4. Antioxidant supplementation in horses affected by recurrent airway obstruction.  |  Deaton, CM., et al. 2004. J Nutr. 134: 2065S-2067S. PMID: 15284404
  5. Oral vitamin E supplementation on oxidative stress, vitamin and antioxidant status in intensely exercised horses.  |  Williams, CA. and Carlucci, SA. 2006. Equine Vet J Suppl. 617-21. PMID: 17402493
  6. The oxidant/antioxidant equilibrium in horses.  |  Kirschvink, N., et al. 2008. Vet J. 177: 178-91. PMID: 17897849
  7. Comparison of an Antioxidant Source and Antioxidant Plus BCAA on Athletic Performance and Post Exercise Recovery of Horses.  |  Kent, E., et al. 2023. J Equine Vet Sci. 121: 104200. PMID: 36577471
  8. 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.
  9. Nutritional Management of the equine athlete  |  Rymond J Geor. 2008. Equine Exercise Physiology. 301-314.
  10. 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:

Horse Antioxidant Supplement - 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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