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Vitamin D lowers risk of breast cancer

Researchers at the University of California, San Diego School of Medicine, suggested that higher levels of vitamin D were associated with reducing the risk of breast cancer.

Published: 16th June 2018 10:33 AM  |   Last Updated: 16th June 2018 10:33 AM   |  A+A-

Image used for representational purpose only.

By ANI

Washington D.C: A vitamin D-rich diet can cut down the risk of breast cancer, according to a recent study.

Researchers at the University of California, San Diego School of Medicine, suggested that higher levels of vitamin D were associated with reducing the risk of breast cancer.

The scientists pooled data from two randomized clinical trials with 3,325 combined participants and a prospective study involving 1,713 participants to examine the association between risk of female breast cancer and a broad range of serum 25-hydroxyvitamin D (25(OH)D) concentrations, which was chosen as the marker because it is the main form of vitamin D in blood.

All women were age 55 or older. The average age was 63. Data were collected between 2002 and 2017. Participants were free of cancer at enrollment and were followed for a mean period of four years. Vitamin D levels in blood were measured during study visits.

Over the course of the combined studies, 77 new cases of breast cancer were diagnosed for an age-adjusted incidence rate of 512 cases per 100,000 person-years.

Researchers identified the minimum healthy level of 25(OH)D in blood plasma to be 60 nanograms per millilitre, substantially higher than the 20 ng/ml recommended in 2010 by the Institute of Medicine, now the National Academy of Medicine, a health advisory group to the US government. Some groups, such as GrassrootsHealth, have advocated higher minimums for health blood serum levels of vitamin D, as much as 50 ng/ml. The matter remains hotly debated.

"We found that participants with blood levels of 25(OH)D that were above 60 ng/ml had one-fifth the risk of breast cancer compared to those with less than 20 ng/ml," said principal investigator and co-author Cedric F. Garland. Risk of cancer appeared to decline with greater levels of serum vitamin D.

"This study was limited to postmenopausal breast cancer. Further research is needed on whether high 25(OH)D levels might prevent premenopausal breast cancer," Garland said.

The study appears in journal PLOS ONE.

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