High blood levels of vitamin D are associated with a reduced risk of
colorectal cancer, according to a new meta-analysis of observational studies
from an international team of researchers. Analysis of data from nine
studies revealed that, for every 10 nanograms per milliliter increase in
levels of vitamin D (25-hydroxyvitamin D) the associated risk of colorectal
cancer decreased by 15 percent. On the other hand, no association was
observed between vitamin D levels and the risk of breast or prostate cancer,
say results published in the International Journal of Cancer.