By all forms of measurement reviewed, cocoa, dark and milk chocolate have
high polyphenol antioxidant values compared to fruits and vegetables. A 1999
analysis of chocolate's polyphenol antioxidant levels utilizing the ORAC
(Oxygen Radical Absorbance Capacity) measurement methodology found dark
chocolate to contain 13,120 ORAC units per 100 grams, or more than twice the
ORAC activity level of prunes (5,770 ORAC units per 100 grams) which
contains one of the highest levels of fruits and vegetables tested.
http://www.chocolateandcocoa.org/Health/antioxidants.htm