Vitamin D Home Test

The ever-resourceful Dr. John Cannell of the Vitamin D Council has announced the availability of an at-home, self-ordered vitamin D test kit for $65. The Vitamin D Council newsletter is reprinted below.

(However, please note that, as wonderful as the advice Dr. Cannell provides, I don't agree on several small points, such as the lack of need for vitamin D if you use a tanning bed or obtain "sufficient" sun; I have seen many people with dark tans, virtually all over 40 years old, who are still severely deficient. I attribute this to the lost capacity for vitamin D activation as we age.)

I have not used this service. Should anyone choose to try it, please let us know how it goes.

The Vitamin D Newsletter
December 28, 2008

The Vitamin D Council is happy to announce that we have partnered with ZRT Laboratory to provide an inexpensive, $65.00, in-home, accurate, vitamin D [25(OH)D] test. The usual cost for this test is between $100.00 and $200.00.

If you read this newsletter, you know about our interest in accurate vitamin D testing. In the next few weeks, you may read about the Vitamin D Council's quest for accurate vitamin D blood tests in the national media. Before we partnered with ZRT, we verified, repeatedly, that ZRT provides accurate and reliable vitamin D tests and that their method corresponds very well to the gold standard of vitamin D blood tests, the DiaSorin RIA.

Our ZRT service is not just inexpensive, it means no more worrying about your doctor ordering the right test or interpreting it correctly. You buy the test kit on the internet or by phone, a few days later the kit comes in the mail, you or a nurse friend do a finger stick, collect a few drops of blood, and send the blotter paper back to ZRT in the postage paid envelope provided with the kit. A week later you get results back in the mail and know accurate 25-hydroxy-vitamin D levels of you and your family.

For every test you order, ZRT will donate $10.00 to the Vitamin D Council. Please read the new page hyperlinked below on our website as it both explains the procedure and how to order the test.

Executive summary: keep your family's 25-hydroxy-vitamin D blood test above 50 ng/ml, year around. Most adults need at least 5,000 IU per day, especially this time of year. Most children need at least 1,000 IU per day per every 25 pounds of body weight. Bio Tech Pharmacal provides high quality and inexpensive vitamin D. Currently Bio Tech Pharmacal is providing vitamin D for numerous scientific studies. To see their prices and for ordering, click the hyperlink below.

As a gift to our readers for the New Year, Thorne publications have provided a free download to a basic paper about vitamin D. I wrote it earlier this year for educated lay people as well as health care practitioners. Please read this paper carefully, your family's well-being, even lives, may depend on you understanding it.

Seasons Greetings
John Cannell, MD

Comments (13) -

  • Anonymous

    12/29/2008 6:48:00 PM |

    Dr. Davis, thanks a lot for publicizing this offer! And thanks to Dr. Cannell for arranging the test with ZRT.

    I've ordered my 4-pack and am looking forward to checking my D3 levels.

  • Jessica

    12/30/2008 1:50:00 AM |

    Hey Doc- I'm due for my D level check, so I ordered a single level AND on the same day I finger stick for the ZRT test, I'll also have a 25(OH) run through the lab. I'm curious to see how well the two correlate (I have an HSA so I don't mind to spend the $65 on the home test and the $59 that my ins approves for the test thats done through the lab).

    Its worth the one time expense to see the potential.

    I'm PSYCHED about the home test!

    I'll let you know how it goes.

  • Dr. William Davis

    12/30/2008 3:52:00 AM |

    Hi, Jessica--

    Please do!

  • Bob Parks

    12/30/2008 4:49:00 PM |

    The ZRT test is not available in California or NY.



  • Anonymous

    1/4/2009 9:49:00 PM |


    NY and CA are ridiculous in their regulations, no doubt about it.  Why is it any of the state's business if you, as a private individual, want to contract to get  your own personal blood analyzed by whomever you choose?

    It's really all about money.  At least in NYS, I know it takes millions in order for a comapny to become "licenced" in the state.

    If you really do care about getting your D tested and you don't have a doc, you can order a blood test from the Life Extension Foundation.  Go to and search under blood tests.

    It's $62 for non members, $42 for members.  However, you do need to get your blood drawn at a blood draw place, so not as convenient.  But still about the same price.

    best wishes

  • Anonymous

    2/7/2009 6:14:00 PM |

    Hi Dr. Davis,

      I ordered this test and it took about 2 weeks to get the results back.  I came back at a 50ng/ml.  This is after supplementing (blindly) for a year with 4000IU of Carlson D3 gelcaps, I shudder to think what it was before that.  Will definitely be upping to 6000IU and trying again in 3 months for 60-70ng/ml.  I'm a 39 year old white male living in PA who rarely sees much sun (but hey I've still got great skin!).  I've noted a definite improvement in mood, used to be depressed and anxious alot.

  • Anonymous

    2/13/2009 8:40:00 PM |

    i ordered the blood spot kit as here in the UK i couldnt get a doctor to test infact got told that no-one is low. I was taking 400iu at first upped it to 1000iu then 4 weeks ago upped it to 5000iu that i had to order from the vitamin d council as couldnt get it here. My test results showed low 31. I dont no if i should up it again to reach over 50. I am wondering what my level was before. I got extra kits as well as it looks like i have to look after my own levels.

  • Ricardo

    7/28/2009 10:29:43 PM |

    Now they're saying tanning beds cause cancer! - "WHO: Tanning Beds Cause Cancer" ->

  • Anonymous

    7/30/2009 11:41:31 PM |

    I did the fingerstick through Grassroots as did my husband. Our results showed me at 13 and him at 23. (We are 50 & 51 respectively). We'll be starting on 6000IU right away.

  • Diana

    8/11/2009 3:58:58 AM |

    I took the test also. I was at 27 at 2000.  I am now up to 6000-8000 depending on how much sun I have and my blood serum levels are up to 62, and I feel great.

    I am in California, and I was able to get the test-??

    Do you have a health success story that you can share?  I am collecting alternative and holistic success stories so we can all learn from each others success!  

    I am still building the site, but if you have a story to share, please add it.  It is through sharing our experiences and stories that we can help each other on our quest to wellness!

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    6/29/2010 8:44:10 PM |

    This test was very important for me!! the results be fine. Thanks for you recomendations Dr. :=)

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    This test was very important for me!! the results be fine. Thanks for you recomendations Dr. :=)

  • Anonymous

    8/18/2010 6:38:14 PM |

    I ordered a kit today to measure my D levels.  I'm quite curious to see what they are since I've been diagnosed with osteopenia.  I am going to do everything in my power to improve my bone density and feel that by knowing what my Vitamin D levels are, and going accordingly is one stop toward this goal.  If I accomplish this goal, I am going to encourage my family, particularly the women to do the same, which is to get their D levels measured and know exactly what they must do to improve their bone density.  The more women who do this can hopefully alleviate the epidemic that prevails in our country, namely either osteopenia or osteoporosis!
    Marie Roy