The revolution in the field of osteoporosis has been aided and abetted by the advent of bone mass measurement technologies. As they become more widely applicable and more affordable, it is evident that we have the potential to discover the millions of individuals at risk for or with the disease. With effective therapies at hand, it is now possible to prevent and treat osteoporosis. There is every reason, therefore, to apply bone mass measurements as widely as possible to discover those subjects at risk for osteoporosis in a manner that is effective and affordable.