Influence of Roasting Conditions on the Antioxidant Characteristics of Colombian Coffee (Coffea arabica L.) Beans
Ah Reum Cho Journal of Food Biochemistry 2013 Vol. 37 Issue 4
We evaluated the effects of the degree of roasting on the antioxidant properties of brewed coffee. Light-roasted coffee beans showed the highest antioxidant activity, and an approximately 40–80% loss of antioxidant activity was observed after further roasting. In addition, light-roasted beans had significantly higher antioxidant activity as compared to unroasted beans, suggesting the formation of Maillard reaction products and the release of bound polyphenols from plant cells. High-performance liquid chromatography analysis indicated that chlorogenic acid was the predominant compound in coffee brews, and that it was degraded with increasing roasting time. Our study demonstrated that light-roasted coffee beans have the most desirable qualities with respect to antioxidative values.