Vitamin D Deficiency Linked To Breast Cancer In New Study

Women deficient in vitamin D at the time of a breast cancer diagnosis are more likely to die or see the tumor spread, a Canadian study published in the United States has shown. Patients low in vitamin D were 94 percent more likely to see their cancer metastasize and 73 percent more likely to die from it, compared to women with normal levels of vitamin D in their blood, researchers found. And many of the 512 breast cancer patients participating in the research, published Thursday in the American Society of Clinical Oncology, had inadequate vitamin D to begin with. Some 37.5 percent of the women were "deficient" in vitamin D and 38.5 percent had "insufficient" levels of the vitamin, which is considered key to bone health. But inve...