Green beans are raw, unroasted espresso beans, meant for roasting at home. Suzuki, A., Fujii, A., Jokura, H., Tokimitsu, I., Hase, T., and Saito, I. Hydroxyhydroquinone interferes with the chlorogenic acid-induced restoration of endothelial perform in spontaneously hypertensive rats. Am.J.Hypertens. 2008;21(1):23-27. View summary. Backside Line: Several managed trials in people show that green coffee bean...