Researchers divided 2300 postmenopausal, healthy women aged 65 or older, into two groups. One group received 2000 IU/day of vitamin D3 and 1500 mg/day of calcium; the other a placebo. After 4 years, the difference in any new cancer incidence between groups was insignificant–including breast cancer. While more research is needed, this study indicates supplementation later in life may not make significant differences.
PositiveTip: Adequate vitamin D and calcium are essential throughout the life span, but supplementation may not be necessary.