Still low after Vitamin D therapy.

I was tested in June and my level was 11 ng/mL .I was put on Vitamin D , 50,000 units once a week for 6 weeks.I was not retested. In Sept I crashed with major fatigue , confusion

and incredible widespread muscle pain. I thought I had some terrible disease ! My doctor tested my level and this time it was 8 ng/ mL . So back on the therapy but now taking 2 a week for 3 months. I have just been retested and my level is 36 ,not all that great from what I am reading . Should I go to a gastro doc to see if I have absorption problem ?

Thank you.

Comments for Still low after Vitamin D therapy.

Click here to add your own comments

by: Kerri Knox, RN- The Immune Queen!

You QUADRUPLED your vitamin d in a matter of 3 months and your number is only about 8 points away from the 'optimal' range that I recommend on my Normal Vitamin D Levels page now. I'm not sure why you think that you are not absorbing vitamin d. You are.

Kerri Knox, RN

In reference to "Still low after vitamin D therapy"
by: Anonymous

Are you aware of the reference Range for Vitamin D? Just in case you aren't, I had lab work done a couple weeks ago and an "Alert" came up for Vitamin D as "insufficient," it was 23; the Reference Range is 30-100, so since you tested at 36 you are in the normal range.

My doctor has started me on Prescription Vitamin D 50000IU for 3 months as I had been taking vitamin D, 1000IU daily, for several months prior to that lab test. If the levels come up I will start back on over the counter vitamin D.

If you continue to feel tired you may consider having your doctor check your thyroid; mine was in normal range. She told me the vitamin D deficiency can make you feel tired all the time.

I hope all goes well for you & God bless!

Reference Range vs. Optimal
by: Kerri Knox, RN- The Immune Queen!

Please read my page on Normal Vitamin D Levels. Just because a blood level is within 'reference ranges' does not make it optimal, and this is nowhere more true than with vitamin d.

Reference ranges are obtained by taking a whole bunch of people in the population who are not overtly ill and testing their levels and getting an average. That is the ONLY way that reference ranges are calculated. However, in the case of Vitamin D, the lower end of the levels are not adequate to provide disease prevention and researchers have determined that up to 85% of the population is Vitamin D deficient, skewing the reference range to the low end.

Therefore the 'Reference Range' is NOT the 'Optimal Range'.

Also, please read my pages on Prescription Vitamin D as it is NOT the recommended form of Vitamin D.

Kerri Knox, RN

Still low Vit. D
by: Anonymous

Thank you both for your responses and Kerri I will definitely read your blog. I know something is wrong here. I was expecting to be around the 50 - 70 range. I do understand it is within normal range but to be taking 50,000 units twice as week for months and score that low alarms me.

Click here to add your own comments

Return to Vitamin D Absorption.

Enjoy this page? Please pay it forward. Here's how...

Would you prefer to share this page with others by linking to it?

  1. Click on the HTML link code below.
  2. Copy and paste it, adding a note of your own, into your blog, a Web page, forums, a blog comment, your Facebook account, or anywhere that someone would find this page valuable.


Search this Site
Custom Search


Vitamin D Fact Sheet
Free Vitamin D Fact Sheet by Getting
My Newsletter