There is another approach to interpreting the treatment/enhancement distinction that seeks to provide a firmer theoretical foundation for delimiting legitimate health care needs. On this approach, to be healthy is to be able to do all that appropriately matched members of one’s own species can do, in our case what human beings of similar age and gender can do. Legitimate health care needs or “health problems” or “diseases” or “maladies” are all characterized by a fall from that level of functional capacity. All proper health care services, therefore, should be aimed at getting people back to “normal”, e.g., restoring an individual’s functional capability to the species-typical range for their reference class, and within that range to the particular capability level which was the patient’s genetic birthright. Interventions which take people to the top of their personal potential (like athletic training) or beyond their own birth range (like growth hormone), or to the top of the range of their reference class, or to the top of the species-typical range, or beyond (!), are all to be counted as enhancements and fall successively further beyond the responsibility of medicine or health care.