Vitamin D: Too Much Can Be Deadly
As reported by ScienceDaily (03/15) High Levels Of Vitamin D Is Suspected Of Increasing Mortality Rates
The level of vitamin D in our blood should neither be too high nor to low.
Scientists from the University of Copenhagen are the first in the world to show
that there is a connection between high levels of vitamin D and cardiovascular
In terms of public health, a lack of vitamin D has long been a focal point.
Several studies have shown that too low levels can prove detrimental to our
health. However, new research from the University of Copenhagen reveals, for
the first time, that also too high levels of vitamin D in our blood is
connected to an increased risk of dying from a stroke or a coronary.
The results have just been published in the Journal of Endocrinology and
Metabolism. "We have studied the level of vitamin D in 247,574 Danes, and so
far, it constitutes the world's largest basis for this type of study. We have
also analysed their mortality rate over a seven-year period after taking the
initial blood sample, and in that time 16,645 patients had died. Furthermore,
we have looked at the connection between their deaths and their levels of
vitamin D," Professor at the Department of Clinical Medicine, Peter Schwarz
explains. The conclusion is clear: the study confirms that there is indeed a
correlation between mortality rates and too low levels of vitamin D, but the
new thing is that the level of vitamin D can also be too high. "If your vitamin
D level is below 50 or over 100 nanomol per litre, there is an greater
connection to deaths. We have looked at what caused the death of patients, and
when numbers are above 100, it appears that there is an increased risk of dying
from a stroke or a coronary. In other words, levels of vitamin D should not be
too low, but neither should they be too high. Levels should be somewhere in
between 50 and 100 nanomol per litre, and our study indicates that 70 is the
most preferable level," Peter Schwartz states.
That having too much vitamin D in our blood can be bad for our health has never
been proven before, and it may have great influence on our future intake of
nutritional supplements. "These are very important results, because there is
such great focus on eating vitamin D. We should use this information to ask
ourselves whether or not we should continue to eat vitamins and nutritional
supplements as if they were sweets. You shouldn't simply up the dose to feel
better. We should only consume such vitamins in close coordination with our
GP," Peter Schwartz concludes.