Chlorogenic acid has good antioxidant property which is associated to many positive health effects. Chlorogenic acid can be found in raw coffee bean. The longer coffee bean is roasted, the lesser Chlorogenic acid is present. There are researches http://premier-pharmacy.com/product-category/asthma/ suggesting a number of health benefits from roasted coffee even though it contains substantially less Chlorogenic acid than most raw green coffee bean. Supplements of raw coffee bean are available and can be purchased.