Coffee
Coffee is a brewed beverage with a distinct aroma and flavor prepared from the roasted seeds of the coffea plant. The beans are found in coffee "cherries", which grow on trees cultivated in over 70 countries, primarily in equatorial Latin America, Southeast Asia, South Asia and Africa. Green (unroasted) coffee is one of the most traded agricultural commodities in the world. Coffee is slightly acidic (5.0-5.1 pH) and can have a stimulating effect on humans because of its caffeine content. It is one of the most-consumed beverages in the world.Wild coffee's energizing effect was likely first discovered in the northeast region of Ethiopia. Coffee cultivation first took place in southern Arabia; the earliest credible evidence of coffee drinking appears in the middle of the 15th century in the Sufi shrines of Yemen. From the Muslim world, coffee consumption and cultivation spread to India, to Italy, and on to the rest of Europe, Indonesia and the Americas.
In East Africa and Yemen, coffee was used in native religious ceremonies that competed with the Christian Church. As a result, the Ethiopian Church banned its secular consumption until the reign of Emperor Menelik II of Ethiopia. The beverage was also banned in Ottoman Turkey during the 17th century for political reasons and was associated with rebellious political activities in Europe.
Many studies have examined the health effects of coffee, and whether the overall effects of coffee consumption are positive or negative has been widely disputed. The method of brewing coffee has been found to be important in relation to its effects on health. For instance, preparing coffee in a French press leaves more oils in the drink compared with coffee prepared with paper coffee filter. This might raise the drinker's level of "bad cholesterol."