GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - B4585B1R7TD7G55LK

Vitamin E helps the body eliminate harmful chemicals, so some health-conscious people take vitamin E supplements. There are two forms of vitamin E, and currently vitamin E supplements contain only the alpha form, while only the gamma form rids the body of the destructive chemical peroxynitrate. As it turns out, there is enough gamma form contained in the typical diet to protect against peroxynitrate, yet even so, the gamma form should be added to vitamin E supplements because ________.