A recent NIH funded study published in the journal JAMA Oncology found that women with higher serum 25(OH)D levels experienced improved health outcomes following diagnosis of invasive breast cancer.
In this study, researchers from Kaiser Permanente and Roswell Park Cancer Institute gathered 1,666 participants diagnosed with invasive breast cancer in 2006 in Northern California. The participants had their vitamin D status measured within two months of breast cancer diagnosis and filled out a questionnaire regarding their diet, lifestyle and other risk factors. The researchers followed up with the participants at 6 months, and at two, four, six and eight years.
The researchers prospectively assessed breast cancer recurrence, secondary cancer and mortality. Here is what the researchers found:
- The researchers found that women with the highest vitamin D status had about a 30% increased odds of survival than those with the lowest vitamin D levels.
- Furthermore, premenopausal women in the highest tertile for vitamin D status experienced a 63% increased survival rate, with a 48% decreased risk of breast cancer recurrence and a 42% decreased risk of invasive-disease-free survival during the 7 year follow up.
News Medical covered this study. Click here to read more.