Low vitamin D levels have once again proven to be a risk factor for earlier death. In a study of Asian women, low levels of vitamin D correlated to a doubling of the risk of death over 6.9 years. Osteoporosis and cancer that existed when the study began were also predictive of early death, which would be expected. What intrigues me is that both osteoporosis and cancer are closely correlated to low vitamin D levels; it is therefore plausible that low levels of vitamin D were not only directly responsible for a higher death rate, but also at least partially responsible for the increased risk of the two deadly diseases that also predicted more deaths.
This is at least the third study to show that lower vitamin D levels correlate to shortened life spans. The evidence is incontrovertible: for a long life with fewer diseases, keep your vitamin D levels high.
 Kuroda, T et al. Contributions of 25-hydroxyvitamin D, co-morbidities and bone mass to mortality in Japanese postmenopausal women. Bone 2009;44:168–172