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Selenium Horse Supplement
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Selenium Horse Supplement

By Horse Guard Leading · Health

Want a practical read on Selenium Horse Supplement for horse owners?

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Horse Guard Implements Organically Bound Selenium

Selenium Deficiency Map.

FDA Approves Organically Bound Selenium, a Major Advance in Equine Nutrition by Horse Guard Leading the Way in nutrition for horse health.

Selenium the most important nutrient to supplement in most parts of the United States. Organic selenium has big advantages over inorganic selenium (Selenite and Selenate). In August 2004, the FDA approved the use of organic selenium in horses. Del Johnson MS PAS, the nutritionist at Equine Nutrition Inc. has been a horseman all his life. He and his family have made their love of equines and concern for their health and welfare a full time job as makers of Horse Guard health and nutritional products. They constantly study cutting edge research to find new ways of bringing horse owners solutions to their equine problems through a foundation of solid nutrition. Horse Guard was the first over the counter product containing selenium. Selenium is the most important nutrient to supplement in deficient areas.

Just recently, the FDA approved "Organically Bound Selenium". Del was one of the first to recognize the impact of this decision and its impact on the equine health. Immediately, Organically Bound Selenium became the source of selenium in Horse Guard products. When you read this article you will find that changing the source of selenium is incredibly important in breeding programs, disease resistance, recovery from stressful exercise and immunity. Inorganic selenium is a byproduct of copper mining. It is taken from the ground and refined to sodium selenite or selenate. It cannot be fully metabolized or stored in the body. Consequently, selenium deficiencies still arise in some horses that are supplemented with inorganic selenium. Animals would not normally ingest inorganic selenium. Although they can use inorganic it is less effective. Research shows that inorganic selenium is less available in times of stress. For example: the stress of performance, disease, injury, birth, etc. In addition, there is a significant loss of selenium after periods of stress, making selenium levels in the blood less stable. Inorganic selenium does not naturally fit into storage mechanisms.

For example: it cannot be stored efficiently in muscles, colostrums, and milk protein. The antioxidant defense system and immunity is compromised when inorganic selenium is used. Organic selenium is selenium that has been taken from the soil into plants. The plants convert selenium into selenomethionine (selenium - amino acid complex) Organic selenium is the type that animals would normally ingest. In commercial production, selenium is provided to cultures of growing yeast (one -celled plants). The mineral is taken into the yeast cell and incorporated in the amino acid complex, selenomethionine. This form of selenium is natural and rapidly metabolized within the body. It is more available and has higher retention which improves its function in the body.

Comparison of Inorganic to Organic Selenium

Inorganic Selenium

Organic Selenium

Origin

By-product of Copper Mining

Produced in Yeast Culture

Natural

Not normally occurring in diet

Natural source of selenium

Absorption

40%

51%

Retained

20%

30%

Effectiveness in the body

Moderate

Highly Effective

Placental Expulsion

60 minutes

30 minutes

Colostrum Selenium

.1 ppm

.18 ppm

Milk Selenium

.015 ppm

.025 ppm

Toxicity

High

Low

What does this mean to your horse? Selenium is basic to energy metabolism. It affects all bodily functions. When selenium is provided in its natural form it is most effective. Birth, growth, immunity, and performance are all negatively affected when selenium is not in the natural organic form.

Advantages of Organic Selenium 1. Maintenance horse Improved immunity and disease resistance

2 Performance horse Faster recovery from stressful events Less damage from the stress of performance Less chance of disease (higher immunity and quicker recovery from disease)

3 Breeding Stock Higher Immunity (important considering increased disease risk of breeding) Quicker recovery from stress Higher Selenium Balance between mares and foals Quicker Placental expulsion Higher selenium in milk Higher selenium levels in foals blood after birth

This allows the foal to build quicker immunity and helps the foal to handle the stress of birth. The benefits last a life time. Foals are supplied superior selenium in milk and develop healthier blood and tissues. They experience less oxidative damage from stresses of the environment. At maturity, they have superior immunity and recover better from stresses of performance or injury. In short, they have an advantage for all the challenges they experience in the course of life. Equine Nutrition Inc. has added organic selenium to all of our products which provide selenium. Since the cost of organic selenium is 100 greater than the cost of inorganic many companies will not choose to include the organic form. We feel that the benefits out weigh the cost by a huge margin. We are pleased to offer organic selenium in Horse Guard, Mega-Dose, Super Gain and Vitamin E and Organic Selenium.

Horse Guard Products

Contact: Horse Guard Staff 69400 N.W. 91st Street Redmond, Oregon 97756 Phone: 1-800-553-4246 Email: del@horseguard.com Website: www.horseguard.com

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Key Article Takeaways
  • Horse Guard moved to organically bound selenium the moment FDA approved it in August 2004.
  • Most U.S. soils are selenium-deficient; supplementation is essential, not optional.
  • Organic selenium absorbs and stores in the body better than inorganic Selenite/Selenate.
  • Better selenium status improves breeding outcomes, immunity, and recovery from hard work.
  • Inorganic selenium is a copper-mining byproduct; organic selenium is purpose-built nutrition.
Questions readers commonly ask:
Why does my horse need selenium supplementation?

Per Horse Guard: across most of the United States, soils are selenium-deficient, which means hay, pasture, and locally grown grain don't deliver enough on their own. Selenium drives immune function, muscle recovery, fertility, and antioxidant activity—deficiency shows up as poor performance long before clinical symptoms.

What's the difference between organic and inorganic selenium?

Per Horse Guard: inorganic forms (Selenite, Selenate) are a byproduct of copper mining and absorb less efficiently. Organically bound selenium is incorporated into amino acids, mirrors how selenium occurs naturally in plants, and the horse's body absorbs and stores it far more efficiently.

When did organic selenium become legal?

Per Horse Guard: the FDA approved organically bound selenium for horses in August 2004. Horse Guard recognized the impact immediately and switched its products to the new source as soon as supply was available.

Will improving selenium really change breeding outcomes?

Per Horse Guard: yes—selenium status affects mare fertility, foal vitality, and stallion sperm quality. Breeding farms that switch to organic selenium frequently report better conception rates and stronger foals at birth.

Can I over-supplement selenium?

Per Horse Guard: yes—selenium has a narrow safe range, and toxicity is real. Always follow label dosing, never combine multiple selenium-containing supplements without a vet's review, and consider a blood test annually to confirm levels are appropriate for your horse's diet and workload.

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