The relationship between Vitamin E and Selenium enhances muscle growth, aides in the cell regeneration of muscle nerve and surrounding soft tissue, and promotes fertility for mares and increased sperm counts in stallions of any age.

Selenium helps maintain the strength and integrity of cell membranes, promoting optimal growth and performance as does Vitamin C.

Vitamin E is often used (meant to be) for muscle soreness and tying up (azoturia) in high performance, show horses and working horses. 

When you work your horse very hard, compete or show your horse in an event and your horse is showing signs of muscle soreness or tying up (azoturia) this is a perfect use for Vitamin E for all high performance, show horses and working horses.

These two nutrients, Vitamin E and Vitamin Selenium (SE) have also been shown to stimulate beneficial results to your horse’s vital immune system.

Administer: 1 ounce "only" in horses feed daily to avoid selenium toxicity.