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Increased Calcium decreases Vitamin D in males – Nov 2020

Increased calcium intake is associated lower serum 25-hydroxyvitamin D levels in subjects with adequate vitamin D intake: a population-based observational study

BMC Nutrition v 6, # 49 (2020) Nov 2, DOI https://doi.org/10.1186/s40795-020-00381-4
Rolf Jorde & Guri Grimnes

Males red arrow is > 840 IU of vitamin D

Image

VitaminDWiki

Possible reason: high Calcium levels ==> Inflammation ==> Vitamin D used up

Some of the problems of excess Calcium (which causes inflammation) may be decreased by

  1. Magnesium
  2. Vitamin K
  3. Water
  4. Consuming Calcium from plants not rocks

Calcium bioavailability and how much to take has the following

see wikipagehttp://www.vitamindwiki.com/tiki-index.php?page_id=1936


Items in both categories Calcium and Vitamin K are listed here:


Items in both categories Calcium and Magnesium are listed here:

 Download the PDF from VitaminDWiki

Background
There are indications that an increased intake of calcium has a vitamin D sparing effect, which might be explained by a decreased catabolism of 25-hydroxyvitamin D (25(OH)D). However, there are only a few studies where this has been examined.

Method
In the seventh survey of the Tromsø study, serum 25(OH)D and parathyroid hormone were measured, and questionnaires on calcium and vitamin D intakes filled in.

Results
There were significant interactions between sex, calcium and vitamin D intakes regarding serum 25(OH)D level. The analyses were therefore done stratified. In males there was, regardless of vitamin D intake, a significant decrease in serum 25(OH)D with increasing calcium intake. The difference in serum 25(OH)D between those with the highest and lowest calcium intakes was approximately 10%. In the females, there was in subjects with low vitamin D intake (< 7 μg/d) a significant increase in serum 25(OH)D with increasing calcium intake, which could not be explained by secondary hyperparathyroidism. In females with higher vitamin D intakes, increasing calcium intake was associated with lower serum 25(OH)D levels.

Conclusions
There is, at least in subjects with an adequate vitamin D intake, a negative association between calcium intake and serum 25(OH)D.


Created by admin. Last Modification: Tuesday November 3, 2020 20:05:15 GMT-0000 by admin. (Version 7)

Attached files

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14516 Ca reducesD in males.jpg admin 02 Nov, 2020 12:36 67.10 Kb 159
14515 Increased calcium makes for reduced Vitamin D.pdf PDF 2020 admin 02 Nov, 2020 12:35 931.56 Kb 88
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