Oral feed powder supplement for horses Formulated to supply supplemental vitamin e and selenium that may be lacking or in insufficient quantities in a horses diet Contains zinc and organic selenium 5lb 13985470 AniMed’s Vitamin E and Selenium blend is formulated to supply the antioxidants vitamin E, selenium, yeast and zinc, which helps support a healthy immune system and may help protect the body’s cells and tissues from free radicals.AniMed’s Vitamin E & Selenium also contains the following natural ingredients:Yea-Sacc ®1026, which supports healthy digestion, stabilizes cecal and colon pH, and aids gastrointestinal health, stability and integrity.Sel-Plex®, with selenium in its natural form in the same range of selenocompounds present in plants—the form animals are best able to absorb, store and stabilize.