Comparison of Antioxidant Potency of Commonly Consumed Polyphenol-Rich Beverages in the United States

作者：Navindra Persaud Seeram, Michael Aviram, Yanjun Zhang, Susanne M. Henning, Lydia Feng, Mark L. Dreher, David Heber · 发表于：Journal of Agricultural and Food Chemistry · 年份：2008 · DOI：10.1021/jf073035s · 被引用次数：691 · 研究领域：Pomegranate: compositions and health benefits、Phytochemicals and Antioxidant Activities、Antioxidant Activity and Oxidative Stress

A number of different beverage products claim to have antioxidant potency due to their perceived high content of polyphenols. Basic and applied research indicates that pomegranate juice (PJ), produced from the Wonderful variety of Punica granatum fruits, has strong antioxidant activity and related health benefits. Although consumers are familiar with the concept of free radicals and antioxidants, they are often misled by claims of superior antioxidant activity of different beverages, which are usually based only on testing of a limited spectrum of antioxidant activities. There is no available direct comparison of PJ's antioxidant activity to those of other widely available polyphenol-rich beverage products using a comprehensive variety of antioxidant tests. The present study applied (1) four tests of antioxidant potency [Trolox equivalent antioxidant capacity (TEAC), total oxygen radical absorbance capacity (ORAC), free radical scavenging capacity by 2,2-diphenyl-1-picrylhydrazyl (DPPH), and ferric reducing antioxidant power (FRAP)]; (2) a test of antioxidant functionality, that is, inhibition of low-density lipoprotein (LDL) oxidation by peroxides and malondialdehyde methods; and (3) evaluation of the total polyphenol content [by gallic acid equivalents (GAEs)] of polyphenol-rich beverages in the marketplace. The beverages included several different brands as follows: apple juice (3), açaí juice (3), black cherry juice (3), blueberry juice (3), cranberry juice (3), Concord g...