Sustainable health care gets paramount importance when cost benefits risk of main stream medical system has created enormous challenge for common masses. It becomes too evident when people living in slums, tribal areas and remote village don't have access to basic health care. Alternative systems especially Unani system which has huge base of natural drug products and is a culture friendly system serves an important filling gap in this scenario. More over the limitations of the present system has compelled the civilized societies to turn to this natural system which synchronizes well with the evolutionary adoptive measures of human race. The paper emphasizes the challenges and enumerates the potential of Unani system to fetch up a self fulfilling sustainable health care.