By John Salak - Yet another coffee conundrum has surfaced. In recent weeks at least three different studies out of Britain, Australia and the United States have either warned of dire consequences from drinking coffee or heralded its benefits. Two of the studies, in fact, directly contradict each other on whether a few expressos or lattes will help and hinder cardiovascular health. Unfortunately, this is no small matter considering an estimated 3 billion cups of coffee are downed each day and cardiovascular disease is the leading cause of death worldwide, taking almost 20 million lives each year. Against this backdrop, the University of South Australia warned that heavy coffee consumption—more than six cups a day—can raise the risk of cardiovascular…