Women with breast cancer are likely to have low levels of vitamin D, which could contribute to decreased bone mass and greater risk of fractures.

Vitamin D plays a vital role in reducing the risk of heart disease and death associated with older age.

Seven out of ten U.S. children have low levels of vitamin D, raising their risk of bone and heart disease, according to a study of over 6,000 children by researchers at Albert Einstein College of Medicine of Yeshiva University. The striking findings suggest that vitamin D deficiency could place millions of children at risk for high blood pressure and other risk factors for heart disease. The study is published today in the online version of Pediatrics.

There are several risk factors for the development of Alzheimer's disease and vascular dementia. Based on an increasing number of studies linking these risk factors with Vitamin D deficiency, an article in the current issue of the Journal of Alzheimer's Disease by William B. Grant, PhD of the Sunlight, Nutrition, and Health Research Center suggests that further investigation of possible direct or indirect linkages between Vitamin D and these dementias is needed.

Pregnant women with low levels of vitamin D may be more likely to suffer from bacterial vaginosis (BV) – a common vaginal infection that increases a woman's risk for preterm delivery, according to a University of Pittsburgh study. Available online and published in the June issue of the Journal of Nutrition, the study may explain why African-American women, who often lack adequate vitamin D, are three times more likely than white women to develop BV.

Vitamin D may slow the progressive decline in the ability to breathe that can occur in people with asthma as a result of human airway smooth muscle (HASM) proliferation, according to researchers at the University of Pennsylvania.

After a study of more than 3,000 people, a team at Warwick University found that more time in the sun would help to counter vitamin D deficiency, common in elderly people, and this would help cut their risk of heart disease and diabetes.

Bacterial vaginosis (BV) is the most common vaginal infection in US women of childbearing age, and is common in pregnant women. Bacterial vaginosis occurs when the normal balance of bacteria in the vagina is disrupted and replaced by an overgrowth of certain bacteria.

Taking a DHEA supplement combined with vitamin D and calcium can significantly improve spinal bone density in older women, according to a new study from a Saint Louis University scientist and his colleagues at Washington University.

A group of endocrinologists in Sydney have observed that very sick patients tend to have very low levels of Vitamin D. The sicker they are, the lower the levels.

New research provides evidence for a link between vitamin D insufficiency and asthma severity.

Deficiency in vitamin D has been widely regarded as contributing to autoimmune disease, but a review appearing in Autoimmunity Reviews explains that low levels of vitamin D in patients with autoimmune disease may be a result rather than a cause of disease and that supplementing with vitamin D may actually exacerbate autoimmune disease.