21st Century E-400 is a dietary supplement containing 400 IU of Vitamin E in softgel form. This supplement comes in a bottle of 33 softgels and is designed to support heart health and boost immune system function through its antioxidant properties. The product is manufactured by 21st Century Healthcare, a well-known supplement company. The softgel format helps with optimal absorption since Vitamin E is fat-soluble. The bottle features clear labeling with green and brown accents indicating its natural health support properties. As with all supplements, this should be stored in a cool, dry place and used as directed on the label.