Green coffee refers to unroasted coffee beans, which have not yet gone through the roasting process that gives coffee beans their characteristic brown color and distinctive flavor. Green coffee beans are essentially raw coffee beans, and they are called "green" because of their greenish color. Green coffee beans are typically smaller and harder than roasted coffee beans, and they have a slightly grassy or vegetal smell. They are often roasted before being used to make coffee, as roasting is necessary to develop the flavors and aromas that coffee drinkers enjoy. However, some people use green coffee beans for various purposes, such as making coffee extracts or supplements. Green coffee beans are also believed to have several potential health benefits, as they contain a high concentration of chlorogenic acid, a natural antioxidant that is thought to have anti-inflammatory and metabolism-boosting effects. However, more research is needed to fully understand the potential health benefits of green coffee beans.