Green coffee is the unprocessed version of regular black coffee i.e. the aromatic, roasted beans we all know and love. Green coffee has had nothing done to it, its simplicity is the key to its benefits. Green coffee beans are the raw seeds picked from trees native to tropical and southern Africa and tropical Asia. The roasting process is what eventually changes the green coffee bean to the brown, crisp, and hugely aromatic common coffee bean.
However it is the roasting process that damages one of the key fat burning components of green coffee beans known as Chlorogenic acid. Chlorogenic acid has been thought to have cardioprotective and anti-diabetic properties, meaning it green coffee might help to stave off heart disease and diabetes (if combined with a healthy balanced diet and regular physical activity). Perhaps most interesting though is that green coffee bean (specifically Chlorogenic acid) has been linked to fat burning. The mechanism isn’t fully understood yet but it is thought that it slows the absorption of fat and thus increases fat excretion (loss in faeces), as well as increasing metabolism.