Dr. Garland explains how the risk of breast cancer decreases as 25-hydroxy vitamin D blood levels increase.
Dr. Cedric Garland, Dr.P.H., F.A.C.E.:
Yes, they do. The blood levels drop. As the blood levels of 25 HD go higher and higher in cross-sectional or observational studies, we see lower and lower incidence of breast cancer. We can’t make a completely a cause-effect relationship just yet because there’s some pending studies that will help us to say for sure that it’s direct cause and effect, but it’s certainly an association that’s enough of a reason to be thinking seriously about knowing what your vitamin D level is.
About Dr. Cedric Garland, Dr.P.H., F.A.C.E.:
Dr. Cedric Garland, Dr.P.H., F.A.C.E., is adjunct professor in the Department of Family and Preventive Medicine at the University of California, San Diego. His research interests include, epidemiology of breast cancer, colon cancer, leukemia, melanoma, multiple sclerosis and ovarian cancer.