Coffea arabica, also known as the Arabian coffee, is a species of Coffea. It is believed to be the first species of coffee to be cultivated, and is the dominant cultivar, representing some 60% of global production. Arabica coffee's first found in Yemen and documented by the 12th century. The other famous type of coffee is called Robusta."Green coffee" beans are coffee seeds (beans) of Coffea fruits that have not yet been roasted. The roasting process of coffee beans reduces amounts of the chemical chlorogenic acid. Therefore, green coffee beans have a higher level of chlorogenic acid compared to regular, roasted coffee beans. Chlorogenic acid in green coffee is thought to have health benefits.
Green coffee became popular for weight loss after it was mentioned on the Dr. Oz show in 2012. The Dr. Oz show referred to it as "The green coffee bean that burns fat fast" and claims that no exercise or diet is needed. People take green coffee by mouth for obesity, diabetes, high blood pressure, Alzheimer's disease, and bacterial infections.
For weight loss, chlorogenic acid in green coffee is thought to affect how the body handles blood sugar and metabolism.