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globeandmail.com: Vitamin D can lower risk of death by 7 per cent

globeandmail.com: Vitamin D can lower risk of death by 7 per cent

Vitamin D can lower risk of death by 7 per cent

MARTIN MITTELSTAEDT

From Tuesday's Globe and Mail

September 11, 2007 at 11:12 AM EDT

Taking vitamin D has been found to have a new benefit: It appears to be a life extender, according to a new study.

Researchers who pooled the results of 18 separate experiments conducted in several industrialized countries reported that people who were given a vitamin D supplement had a 7-per-cent lower risk of premature death than those who were not.

The pooled results were from experiments conducted in the United States, Germany and Britain, among other countries, and included more than 57,000 participants.

For reasons that are not yet fully understood, those who received vitamin D had a lower chance of dying prematurely than those given dummy pills, or placebos, in the experiments, said the study published yesterday in the Archives of Internal Medicine.
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"Mechanisms by which vitamin D supplements would decrease all-cause mortality are not clear," said the study's authors, Philippe Autier of the International Agency for Research on Cancer in Lyon, France, and Sara Gandini of the European Institute for Oncology in Milan, Italy.

Earlier research has indicated that vitamin D deficiencies are associated with higher risks of contracting major illnesses such as cancer, which account for 60 to 70 per cent of deaths in high-income countries.The study speculates that the vitamin, which is used in organs and tissues throughout the body, may cut death rates by inhibiting the proliferation of cancerous cells.

Vitamin D is also known as the sunshine vitamin, because it is produced in naked skin that is exposed to strong sunlight.

Many medical experts believe people living in northern countries have a chronic deficiency of the vitamin in winter, when the weak sunlight does not lead to creation of the nutrient in skin.

Although most of the vitamin D people have is made in their skin, it is also available in supplement form and in some foods.
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