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Low vitamin D tied to premature death, Study
Low vitamin D tied to premature death, Study

Low vitamin D tied to premature death, Study

People with lower levels of vitamin D are twice as likely to die prematurely than those who have higher levels in their blood, said Univ. of Calif.-San Diego researchers.

Lead study author Cedric Garland said 30 nanograms per milliliter of vitamin D was associated with the lower death rate, and that two-thirds of the U.S. have estimated blood levels below 30 ng/ml. Humans can increase their natural production of vitamin D through exposure to sunlight.

“Three years ago, the Institute of Medicine (IOM) concluded that having a too-low blood level of vitamin D was hazardous,” said Cedric Garland, professor in the Department of Family and Preventive Medicine at University of California – San Diego and lead author of the study.

“This study supports that conclusion, but goes one step further. The 20 nanograms per millilitre (ng/ml) blood level cutoff assumed from the IOM report was based solely on the association of low vitamin D with risk of bone disease.

“This new finding is based on the association of low vitamin D with risk of premature death from all causes, not just bone diseases,” Garland said.
Garland said the blood level amount of vitamin D associated with about half of the death rate was 30 ng/ml. He noted that two-thirds of the US population has an estimated blood vitamin D level below 30 ng/ml.

“This study should give the medical community and public substantial reassurance that vitamin D is safe when used in appropriate doses up to 4,000 International Units (IU) per day,” said Heather Hofflich, professor in the UC San Diego School of Medicine’s Department of Medicine.

“However, it’s always wise to consult your physician when changing your intake of vitamin D and to have your blood level of 25-hydroxyvitamin D checked annually.

“Daily intakes above 4,000 IU per day may be appropriate for some patients under medical supervision,” Hofflich said.

The average age when the blood was drawn in this study was 55 years; the average length of follow-up was nine years. The study included residents of 14 countries, including the US, and data from 566,583 participants.

Agencies/Canadajournal




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