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In a previous blog we showed that supplemental magnesium and vitamin K2 individually affect vitamin D levels. In today’s blog we will investigate whether combined intake of both supplemental magnesium and vitamin K2 has a greater effect on vitamin D levels than either individually.

Using the data provided for the GrassrootsHealth study from almost 3,000 participants with supplemental magnesium and vitamin K2 information, we plotted every participant’s supplemental vitamin D intake (dose) and blood level (response) and determined the average trends for participants who reported taking no supplemental magnesium or vitamin K2, those who reported usually taking both supplemental magnesium and vitamin K2, and those who reported taking only one or the other.

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The dose-response chart above shows that on average, those taking both supplemental magnesium and vitamin K2 have a higher vitamin D level for any given vitamin D intake amount than those taking either supplemental magnesium or vitamin K2 or neither. Specifically, 244% more supplemental vitamin D was needed for 50% of the population to achieve 40 ng/ml (100 nmol/L) for those not taking supplemental magnesium or vitamin K2 compared to those who usually took both supplemental magnesium and vitamin K2.

How is your vitamin D level responding to supplementation?

Did you know that you can track your intake of whichever nutrients you want and see how your vitamin D level responds? Track and test today.  Make sure you know your vitamin D level, and take steps to keep it within a target of 40-60 ng/ml or 100-150 nmol/L! Through GrassrootsHealth Nutrient Research Institute, you can also test your essential elements magnesium, copper, zinc and selenium, toxins such as lead, mercury and cadmium, as well as your omega-3 levels, inflammation levels and thyroid stimulating hormone (TSH) level. Find out your levels today! Log on to the test selection page (click the link below) to get your tests and see for yourself if your levels can be improved.

Make sure you track your results before and after, about every 6 months!

Click Here to Access the Test Page

How can I track my nutrient intake and levels over time?

To help you track your supplement use and nutrient levels, GrassrootsHealth has created the Personal Health Nutrient Decision System called

For each specific supplement, you can track what days you take it, how much, and many other details.  This will help you know your true supplemental intake and what patterns of use work for you to reach and maintain optimum nutrient levels.  Check it out today!