Made for antioxidant protection and other benefits. E-400 400 IU 90 gels by Karuna is a dietary supplement made of vitamin E in soybean oil. Because the vitamin is fat-soluble. it is a necessary means by which the body protects structures from free radicals and the central nervous system. Research is also showing its role in aiding in optimal circulation. immunocompetence and joint health. The extract is designed to match the variety of types normally in the diet.