Photo: iStockVitamin E and selenium play complementary roles in equine immune health, functioning as key antioxidants that help protect cells from oxidative stress and support normal immune responses. Because requirements vary by diet, geography, and workloadand excess selenium can be harmfulhorse owners should work with a veterinarian or nutritionist to evaluate forage and select appropriately dosed, research-supported sources. In this Ask TheHorse Live Excerpt, Frank Andrews, DVM, MS, Dipl. ACVIM, of Louisiana State University, in Baton Rouge, describes the role of vitamin E and selenium in equine immune health.This podcast is an excerpt of ourAsk TheHorse Live Q&A, Choosing the Right Supplement for Your Horse. Listen to thefull recording here.About the Experts: Frank M. Andrews, DVM, MS, Dipl. ACVIM (LAIM)Frank M. Andrews, DVM, MS, Dipl. ACVIM (LAIM), is a graduate of Washington State University College of Veterinary Medicine in Pullman, where he received a DVM and MS. After a year in private veterinary practice, he completed an equine medicine and surgery residency at The Ohio State University, in Columbus. After 20 years on the faculty at the University of Tennessee College of Veterinary Medicine, in Knoxville, he is currently LVMA Equine Committee professor and director of Equine Health and Sports Performance at Louisiana State University School of Veterinary Medicine (LSU Vet Med), in Baton Rouge. Andrews has clinical and research interests in gastric ulcers and gastrointestinal disease, and he's completed research on the efficacy of pharmacologic agents in the treatment of gastric ulcers in horses. Andrews is actively involved in clinical equine practice and clinical research.