What is a 'normal' vitamin D level?

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My doctor drew blood to test for it last week. I just got the lab results back and she's got on there, "TOO LOW!"

It is 19, but there's no 'normal range' printed on that area of the form. They're supposed to be calling in an Rx for "Vit D2" (that's what she wrote on the form).

I know nothing about this particular subject. I've tried looking up 'normal levels' online but it's all so confusing. If anyone can shed some light on this, thanks so much, I really appreciate it!

Last edited by sinistral55; 09-17-2008 at 07:00 PM.
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I found this site. It seems to mention specific ranges of normal.

I was recently tested for low Vitamin D as well. The doctor I go to recommended that 'normal' levels are around 40-50 units of Vit. D.

Therefore, I am currently taking, once a week, a 50,000 IU Vit. D pill. Then in a couple of weeks (after 8 weeks of use), I'll go in for a new blood test to ensure that my Vit. D levels are boosted.

Vit. D deficiency can lead to a variety of health problems - fatigue, muscle pain, headaches, etc. And low Vit. D can also be an indicator of Crohn's disease or Thyroid issues.

I hope your doctor put you some type of Vit. D suppliment??
*disclaimer* spelling, grammatical and psychological errors are for your enjoyment.
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Thanks to both of y'all for your help, I was about to give up hope of getting a reply...

1) I don't know how long this deficiency has been going on, and I don't know what's causing it. The fatigue and muscle aches are definitely there and have been for a long time.

2) Yes, according to the paper I was supposed to receive an Rx for "Vitamin D2" at the time of my visit, BEFORE they drew the blood or knew that there was a problem . I had to call today and let them know that no, I did not receive an Rx...

3) I hope it's doesn't cost too much. And I'm really worried about constipation. I hope it doesn't upset my stomach and cause diarrhea/constipation.
I don't know your ethnic background, but in a recent Canadian study, 100% of people of African descent, 90% of people of South Asian descent and 85% of people of East Asian/Pacific descent had vitamin D deficiencies. If you are a person of colour/have darker skin then that could be why.
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Yep, I am of African descent. They found some 'nodules' in my thyroid--at least 6 years ago, if not longer. I had to undergo a biopsy of the nodules but the results came back negative.

In fact, all of the blood tests for thyroid issues taken at that time came back normal, as far as I can recall. I'm usually exhausted, lethargic, and always sore and/or stiffish, usually just stiff enough to be annoying. I just assumed it was because being busy and keeping up with a 4-year-old, plus having a mild touch of rheumatoid arthritis.

I really, really hope there's nothing else wrong with my thyroid. Nor Crohn's disease. Or anything else. Especially the thyroid because I don't know if I can go through another biopsy. AAARRRGH first it was these stupid glasses, now THIS!!!

Last edited by sinistral55; 09-18-2008 at 12:38 AM.
I recently got tested and was told my levels were too low. I've been on prescription Vitamin D for 2 weeks now, 3 pills a week @ 50,000 I.U. From what I've read low vitamin D can cause lots of issues, it helps your body absorb calcium.
Some relevant quotes from this excellent article:

Vitamins D2 and D3 have long been regarded as equivalent because they are both capable of curing infantile rickets. Superficially supporting this premise, the one laboratory experiment comparing the ability of the activated forms of vitamins D2 and D3 to bind to the vitamin D receptors of isolated cells and alter gene expression showed vitamin D3 to be only marginally more effective than vitamin D2.47
The modern criteria for judging nutritional vitamin D status, however, is the level of calcidiol in the blood. Two groups of researchers have shown vitamin D3 to be between five44 and ten45 times more effective than vitamin D2 at raising serum levels of calcidiol. Since vitamin D2 cannot effectively raise the serum level of calcidiol, the pool from which activated calcitriol is derived, the binding affinity of D2-derived calcitriol to the vitamin D receptor is irrelevant. Vitamin D2 is therefore incapable of supporting optimal health.
Testing Vitamin D Levels

All people must make a personal decision whether or not to test their vitamin D levels based on the amount of vitamin D they are consuming, their own perception of its risk, and any concern they may have that they are not consuming enough. If you choose to test your vitamin D level, there are several things to keep in mind:
  • Order the calcidiol test, not the calcitriol test. The correct test is also called 25-hydroxyvitamin D or 25 (OH) D
  • The laboratory's reference range is likely to use a very wide definition of "normal." Sufficient levels of vitamin D are at least 32 ng/mL, and ideal levels are probably between 40 and 50 ng/mL.
  • Your vitamin D levels will rise over the spring and summer and decline over the fall and winter. Your vitamin D level during one season will therefore not necessarily reflect your vitamin D level for other seasons.
  • The scientific data does not clearly and consistently define an ideal level of vitamin D, and we do not know to what degree intakes of other nutrients affect what constitutes the ideal level.
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Well, they *finally* called in the Rx.....I have to take 2 a week.

For those taking them, how do you take them (i.e., with food, on empty stomach, w/water, etc.)? Do they cause you any sort of gastro/bowel upset? Thanks.

Last edited by sinistral55; 09-20-2008 at 10:03 AM.
I recently read an article about how vitamin D deficiency may contribute to breast cancer. This could help explain the higher than average rate of BC in women who live here in Seattle. Who knows. I do know that the person who sent me the article was my sister who was diagnosed with BC about a year ago. About 6 months ago, her doctor prescribed supplements because her vit. D levels were too low.
Well, they *finally* called in the Rx.....I have to take 2 a week.

For those taking them, how do you take them (i.e., with food, on empty stomach, w/water, etc.)? Do they cause you any sort of gastro/bowel upset? Thanks.
Originally Posted by sinistral55
I take my pill (I only have to take ONE a week) every Wednesday Morning on an empty stomach. I haven't had any bowel or gastro issues. I take the pill with a full glass of water.
*disclaimer* spelling, grammatical and psychological errors are for your enjoyment.

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