Horses need selenium for optimal cellular function. In conjunction with vitamin E, selenium acts as an antioxidant protecting healthy cells and maintains the proper circulation of thyroid hormones...
Selenium intake should be monitored, especially when supplementing specifically for this trace mineral. Extremely high doses of selenium will cause acute toxicity and possibly death, but these cases are very rare...
Most commercial feeds and grains contain small amounts of selenium. Regardless of whether you suspect a selenium deficiency, horse owners can test their soil and hay for micronutrients...
Although the FDA recommended dosage of selenium for horses may seem small, selenium is a powerful necessity in your horse’s diet. It is important to examine feed, pasture, and added forage for selenium content...