Is 400 IU of Vitamin E a Lot? What You Need to Know
                                
                                
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                                    3 min read                                
                            
                                The recommended dietary allowance (RDA) for vitamin E in adults is 15 mg (around 22 IU) daily, a fraction of the 400 IU found in many supplements. Taking a high dose like 400 IU of vitamin E is a significant intake, and its suitability depends on several factors, including the form of the vitamin, your overall health, and whether you are taking other medications.