What does selenium do for horses?

Selenium has important functions in your horse’s body. It is an anti-oxidant that in conjunction with vitamin E, prevents free radicals from damaging otherwise healthy cells. Selenium is also important for maintaining adequate levels of circulating thyroid hormone.

What are the symptoms of selenium deficiency in horses?

Deficiency in selenium can cause a variety of symptoms in horses, including myopathy (muscle disease), impaired movement, difficulty in suckling and swallowing, respiratory distress and impaired heart function.

How much selenium does a horse need per day?

The FDA has set a daily recommended level of selenium for an “average” horse at a total of 3 mg per day. Many different types of feeds and supplements contain selenium. Take the time to read the labels and calculate how much, if any, selenium is contributing to your horse’s diet.

How much selenium is toxic to horses?

In the case of selenium, more can be toxic. The upper safe total intake of selenium per day, based on the most recent National Research Council publication Nutrient Requirements of Horses, is 20 mg for an average 1,000-pound horse.

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What are the symptoms of selenium deficiency?

What are the symptoms?

  • infertility in men and women.
  • muscle weakness.
  • fatigue.
  • mental fog.
  • hair loss.
  • weakened immune system.


What is the best selenium supplement for horses?

Three forms of selenium are used in feeds and supplements: inorganic sodium selenite, inorganic sodium selenate, and organic selenium yeast. The yeast form has been found to be more bioavailable than the inorganic forms, more readily raising horses’ serum selenium levels.

How do you know if your horse needs magnesium?

Signs that your horse may be magnesium deficient

  1. Very tight, sore back not related to activity, fitness level or saddle fit.
  2. Horse never really relaxes.
  3. Cranky about being brushed or palpated especially over the back on either side of the spine.
  4. Cranky about being blanketed.
  5. History of tying up.

Do horses need salt blocks?

In addition to shade and a source of fresh water, every summer turnout space needs to have a salt block. Horses lose large amounts of the essential mineral in their sweat, and if it’s not replenished, an electrolyte imbalance may develop, leading to low blood pressure or even neurological or cardiovascular problems.

Is it safe to take selenium everyday?

When taken by mouth: Selenium is LIKELY SAFE for most people when taken by mouth in doses less than 400 mcg daily, short-term. However, selenium is POSSIBLY UNSAFE when taken by mouth in high doses or for a long time. Taking doses above 400 mcg can increase the risk of developing selenium toxicity.

What is vitamin E and selenium good for in horses?

Platinum Antioxidant formula contains Vitamin E, Vitamin C and Selenium. These antioxidants work together and may help support cells, tissues, and organs when confronting the effects of free radicals that are formed during normal metabolic processes and exercise in horses.

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How do you know if your horse needs selenium?


  1. Stiff gait.
  2. Sore, painful muscles.
  3. Poor performance.
  4. Muscle spasms and/or trembling.
  5. Tying up (nutritional myopathy/rhabdomyolysis)


Is there selenium in grass hay?

Your hay analysis reports that your grass hay contains . 1 ppm of selenium. You feed 12 lbs of hay each day.

Are selenium blocks safe for horses?

Some mineral blocks that are safe for horses have unsafe copper levels for sheep. There are also mineral blocks with and without selenium. Selenium is an essential antioxidant that horses require in their diet.

What blocks selenium absorption?

Drink alcohol. Take birth control pills. Have a condition that prevents your body from absorbing enough selenium, such as Crohn disease or ulcerative colitis.

What happens if you don’t get enough selenium?

Selenium deficiency can cause Keshan disease (a type of heart disease) and male infertility. It might also cause Kashin-Beck disease, a type of arthritis that produces pain, swelling, and loss of motion in your joints.

What is the best form of selenium to take?

What is the best form of selenium supplements? Selenium is available as selenomethionine, selenocysteine, selenite, and selenate (1). Selenomethionine and selenocysteine are better absorbed by the gut (11).

Trakehner horse