6 replies to this topic

[ElixirOfLife]

I've been taking 5000 IUs daily for at least nine months and recently got re-tested. I haven't even ticked up slightly and I remain at 21 ng/ml. My calcium levels are at the top end of the range.

Any ideas?

[blood]

Is the vitamin D in your supplement dissolved in oil, or present as a dry powder?

Do you take the supplement with a fat-containing meal?

[rwac]

High calcium levels, that might mean a high PTH (Parathyroid Hormone). High PTH converts the storage form calcidiol(which the blood tests should measure, 25(OH)D₃ ) to the active form calcitriol, There may also be other reasons.

It may be worthwhile testing for PTH.
How much calcium are you getting per day?
PTH increases calcium by releasing it from bone, and it can overshoot and cause inflammation.

[ElixirOfLife]

rwac thanks for responding

I don't know how to answer the question about calcium. I believe I get enough from dairy and greens.

I concur that PTH needs to be looked at. Headed to doc tomorrow.

Edited by ElixirOfLife, 28 February 2014 - 05:43 AM.

[rwac]

Well, you should plug in a typical day into cron-o-meter and figure out how much calcium you're getting.
Vitamin K is good as well.

[Henry Lahore]

Some people (about 10%) do not absorb fat-soluble vitamins very well.
There are a variety of alternate forms of vitamin D for such people.
See, for example: http://vitamindwiki....hp?page_id=1252

[JackO'Roses]

What test was used?

Unless it was LC/MS/MS, the test might under-report your levels

Please see the following reference,
Endocrine Society. "Two new vitamin D blood tests are often highly inaccurate, researchers say." ScienceDaily. ScienceDaily, 25 June 2012. <www.sciencedaily.com/releases/2012/06/120625152310.htm>.


It says "Two new blood tests for vitamin D are inaccurate in at least 40 percent of laboratory specimens analyzed....Both of the immunoassays erred on the side of overestimating vitamin D deficiency, which could lead to overtreatment,”"

ymmv