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Too much vitamin D can be as unhealthy as too little
Date:5/29/2012

order to understand the relationship. A lot of research has been conducted on the risk of vitamin D deficiency. However, there is no scientific evidence for a 'more is better' argument for vitamin D, and our study does not support the argument either. We hope that our study will inspire others to study the cause of higher mortality with a high level of vitamin D," says Darshana Durup. She adds:

"We have moved into a controversial area that stirs up strong feelings just like debates on global warming and research on nutrition. But our results are based on a quarter of a million blood tests and provide an interesting starting point for further research."

The largest study of its kind

The study is the largest of its kind and it was only possible to conduct it because of Denmark's civil registration system, which is unique in the Nordic countries. The 247,574 blood samples come from the Copenhagen General Practitioners Laboratory:

"Our data material covers a wide age range. The people who participated had approached their own general practitioners for a variety of reasons and had had the vitamin D level in their bloodstream measured in that context. This means that while the study can show a possible association between mortality and a high level of vitamin D, we cannot as yet explain the higher risk," explains Darshana Durup.

Therefore in future research project scientists would like to compare the results with information from disease registers such as the cancer register. Financial support is currently being sought for such projects.


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Contact: Darshana Durup, Ph.D.
dd@farma.ku.dk
01-145-617-05192
University of Copenhagen
Source:Eurekalert

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