High levels of vitamin D improve survival in breast cancer patients, according to a new review.
Researchers analyzed five studies that included thousands of breast cancer patients who were followed for an average of nine years and found that those with high levels of vitamin D in their blood were twice as likely to survive as those with low levels, United Press International reported.
The findings were published in the journal Anticancer Research.
Further studies are needed, but the researchers said their results suggest that adding vitamin D supplements to breast cancer patients' standard care could be beneficial, UPI reported.