Introduction
In recent years, consumers desire to reduce the risk of or to
manage a specific health condition through improved diet. Plants
have evolved different phytochemicals and enzymes as antioxidant
defense to maintain growth and metabolism (Pandhair & Sekhon,
2006). Concern about improving health, involving agricultural
products with potential benefits, has enhanced research on antioxidants
(Moore, Hao, Zhou, Luther, & Costa, 2005). Many degenerative
human diseases including cancer, cardio- and cerebro-vascular
diseases have been recognized as being a possible consequence of
free radical damage to lipids, proteins and nucleic acids (Choi & Lee,
2009).