100% Natural Antioxidant - A pure all natural oil with no additives. Rice bran is one of the only few natural sources for the newly discovered vitamin E complex called tocotrienols. Tocotrienols are powerful antioxidants that protect the body from damaging free radicals. AniMed’s Rice Bran Oil is recommended for horses of all classes as a balanced source of energy, calories, vitamins, and fatty acids.