New research from the University of Copenhagen indicates that too high a level of the essential vitamin is not good either.
The results from a study on 247,574 Copenhageners of a wide age range support the benefits of vitamin D in terms of mortality risk. However, the research results also show higher mortality in people with too high levels of vitamin D in their bloodstream.
If the blood contains less than 10 nanomol (nmol) of vitamin per liter of serum, mortality is 2.31 times higher.
However, if the blood contains more than 140 nmol of vitamin per liter of serum, mortality is higher by a factor of 1.42.
The lowest mortality risk was at 50–60 nmol/liter.
Both values are compared to 50 nmol of vitamin per liter of serum, where the scientists see the lowest mortality rate. More studies are needed
Darshana Durup, a PhD student, emphasises that while scientists do not know the cause of the higher mortality, she believes that the new results can be used to question the wisdom of those people who claim that you can never get too much vitamin D:
"It is important to conduct further studies in 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.
###The above story is based on the May 29, 2012 news release by University of Copenhagen.
D. Durup, H. L. Jorgensen, J. Christensen, P. Schwarz, A. M. Heegaard, B. Lind. A Reverse J-Shaped Association of All-Cause Mortality with Serum 25-Hydroxyvitamin D in General Practice, the CopD Study. Journal of Clinical Endocrinology & Metabolism, 2012; DOI: 10.1210/jc.2012-1176
Get your Vitamin D through sensible sun exposure, diet and, if necessary sensible supplementation.
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