Coffee is a brewed drink made from roasted coffee beans, which come from berries of the coffee plant. Coffee plants are cultivated in over 70 countries worldwide, primarily in tropical regions. Coffee has a slightly acidic taste and caffeine content that can stimulate humans. While studies on the health effects of coffee have been mixed, moderate consumption is generally considered benign or mildly beneficial for healthy adults. Coffee is commonly consumed with breakfast at home or after meals when eating out.