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Recommendation for vitamin D intake was miscalculated, is far too low, experts say

Date:
March 17, 2015
Source:
Creighton University
Summary:
Researchers are challenging the intake of vitamin D recommended by the National Academy of Sciences Institute of Medicine saying their Recommended Dietary Allowance for vitamin D underestimates the need by a factor of ten.
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FULL STORY

Researchers at UC San Diego and Creighton University have challenged the intake of vitamin D recommended by the National Academy of Sciences (NAS) Institute of Medicine (IOM), stating that their Recommended Dietary Allowance (RDA) for vitamin D underestimates the need by a factor of ten.

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In a letter published last week in the journal Nutrients the scientists confirmed a calculation error noted by other investigators, by using a data set from a different population. Dr. Cedric F. Garland, Dr.P.H., adjunct professor at UC San Diego's Department of Family Medicine and Public Health said his group was able to confirm findings published by Dr. Paul Veugelers from the University of Alberta School of Public Health that were reported last October in the same journal.

"Both these studies suggest that the IOM underestimated the requirement substantially," said Garland. "The error has broad implications for public health regarding disease prevention and achieving the stated goal of ensuring that the whole population has enough vitamin D to maintain bone health."

The recommended intake of vitamin D specified by the IOM is 600 IU/day through age 70 years, and 800 IU/day for older ages. "Calculations by us and other researchers have shown that these doses are only about one-tenth those needed to cut incidence of diseases related to vitamin D deficiency," Garland explained.

Robert Heaney, M.D., of Creighton University wrote: "We call for the NAS-IOM and all public health authorities concerned with transmitting accurate nutritional information to the public to designate, as the RDA, a value of approximately 7,000 IU/day from all sources."

"This intake is well below the upper level intake specified by IOM as safe for teens and adults, 10,000 IU/day," Garland said. Other authors were C. Baggerly and C. French, of GrassrootsHealth, a voluntary organization in San Diego CA, and E.D. Gorham, Ph.D., of UC San Diego.

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Story Source:

Materials provided by Creighton University. Note: Content may be edited for style and length.


Journal References:

  1. Paul Veugelers, John Ekwaru. A Statistical Error in the Estimation of the Recommended Dietary Allowance for Vitamin D. Nutrients, 2014; 6 (10): 4472 DOI: 10.3390/nu6104472
  2. Paul Veugelers, John Ekwaru. A Statistical Error in the Estimation of the Recommended Dietary Allowance for Vitamin D. Nutrients, 2014; 6 (10): 4472 DOI: 10.3390/nu6104472

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Creighton University. "Recommendation for vitamin D intake was miscalculated, is far too low, experts say." ScienceDaily. ScienceDaily, 17 March 2015. <www.sciencedaily.com/releases/2015/03/150317122458.htm>.
Creighton University. (2015, March 17). Recommendation for vitamin D intake was miscalculated, is far too low, experts say. ScienceDaily. Retrieved October 20, 2022 from www.sciencedaily.com/releases/2015/03/150317122458.htm
Creighton University. "Recommendation for vitamin D intake was miscalculated, is far too low, experts say." ScienceDaily. www.sciencedaily.com/releases/2015/03/150317122458.htm (accessed October 20, 2022).

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