How much is too much selenium in 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.

How much selenium can a horse have per day?

The U.S. Food and Drug Administration has set a daily recommended intake of selenium for an average horse (weighing 1,100 pounds) per day as 3 mg or 0.3 ppm in the diet (ppm stands for parts per million and is equivalent to milligrams per kilogram).

How much selenium do horses need?

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.

Can horses get too much selenium?

Selenium, a mineral that protects cells from damage, can be toxic to horses if given too much in their diet. Those horses suffering from chronic selenium toxicity are diagnosed with alkali disease.

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What are the symptoms of selenium deficiency in horses?


  • Stiff gait.
  • Sore, painful muscles.
  • Poor performance.
  • Muscle spasms and/or trembling.
  • Tying up (nutritional myopathy/rhabdomyolysis)

5 авг. 2019 г.

What is selenium good for in 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?

What are the symptoms?

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

11 нояб. 2017 г.

Is there selenium in hay?

Selenium and vitamin E work best when both are sufficient in the horse’s diet. The problem with selenium is that it is absent—or present in infinitesimal amounts—in our soils, as it is the case in all of Eastern North America. As a result, it is not found in plants, such as hay or grain, that grow in these areas.

What causes a selenium deficiency?

Causes. It can occur in patients with severely compromised intestinal function, those undergoing total parenteral nutrition, those who have had gastrointestinal bypass surgery, and also in persons of advanced age (i.e., over 90). People dependent on food grown from selenium-deficient soil may be at risk for deficiency.

Is too much magnesium bad for horses?

When a magnesium overdose occurs, it can shut down cardiac function, result in subsequent collapse of the horse, and in some cases, death may occur. This practice should never be done.

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Can horses have selenium blocks?

Selenium is an essential antioxidant that horses require in their diet. … If your horse eats hay grown in Wisconsin, does not get much grazing in the pasture, and does not regularly get daily grain or mineral supplements, offering a mineral block that contains selenium is a good idea.

Is Selenium good for joints?

Research Shows Selenium May Help Prevent Rheumatoid Arthritis. In other words, selenium is crucial in the regulation of inflammation in the body. Moreover, selenium (and iodine) aids in the production of joint-protecting cartilage, a key component of joint health.

Does alfalfa contain selenium?

Nutritional value alfalfa

It contains the minerals potassium, magnesium, calcium, phosphorus, iron, selenium, zinc, boron, silicon, chromium , cobalt, manganese, molybdenum, sodium and aluminum.

How do you know if your horse needs magnesium?

Signs that your horse may be magnesium deficient

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

Is Sulfur bad for horses?

There have been reports of over consumption of inorganic sulfur in horses. With over 300g of inorganic sulfur fed, symptoms included lethargy, followed by colic and a yellow nasal discharge. Yellowed eyes (jaundice) and labored breathing also followed. Sadly, the sulfur toxicity was fatal for 2 horses.

What does vitamin B12 do for horses?

B Vitamins in Horses

Name Scientific Name Main Function
Vitamin B7 Biotin Supports cell integrity
Vitamin B9 Folic Acid Cell division and growth. Red blood cell production
Vitamin B12 Cobalamin Promotes red blood cell production; involved in protein metabolism and in the metabolism of fats and carbohydrates
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