February 08 2018

Primal Challenge Point: Test Vitamin D Levels

By Mark Sisson

Inline_Live-Awesome-645x445-04“In the winter months, when the sun’s rays are not intense enough to generate sufficient vitamin D production (this is the case for three to five months per year for locations in North American—you know it’s downtime for D when you can’t get a tan even with prolonged sun exposure), supplements and safe-designated artificial tanning implements can be useful or even essential if you are at high risk for deficiency.

If you have an indoor-dominant lifestyle or even a hint of aforementioned risk factors, you should regularly test your blood for vitamin D. (Make sure it’s for ’25-vitamin D’ or ‘serum 25(OH)D.’ You can order this test directly from an online provider like direct labs.com. or, if you are getting a routine checkup, insist they include vitamin D in your blood panels. (Unfortunately, it’s often not included.)”

—From The New Primal Blueprint

For more on vitamin D sources, deficiency, testing and recommended levels, see The New Primal Blueprint or check out past articles on MDA.


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6 thoughts on “Primal Challenge Point: Test Vitamin D Levels”

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  1. I’m Vit D deficient even with taking 50,000 IU every 3 weeks (prescription) as well as LEF’s Bone Restore which has some D in it as well.

    My numbers have improved over time, but winter helps to push it back down.

    1. I is not bad that you check absorption or take it together with vitamin B complex.
      Sorry if I am giving a advice.

      1. Or take the supplements with Ghee (Vitamin K2) helps absorption.

    2. Or even better, regulate your Gut- bacteria. They produce great amount of vitamin K2.

  2. I make time several times a week for the sun exposure. I also do indulge in dairy and take supplements as well. My Vit D levels improved, as I was low at one time.

  3. As I understand it, taking Vitamin D alone is not enough. It must be taken in conjunction with Vitamin K2 (MK-4 & MK-7)