Published on May 6, 2019

When taking and/or prescribing higher doses of vitamin D, it might be useful to know the likelihood of achieving a vitamin D serum level on the higher end of the 25(OH)D serum level spectrum, as well as the lower end. For this reason, GrassrootsHealth has created two charts using data from over 7000 D*action participants to show the probability of getting to a higher level so the value achieved could be put into perspective from a population standpoint.

On the chart below, you can see the percent of the population (based on a weight of 150 lbs) that achieves 40, 60, or 100 ng/ml with different intakes. For example, note that less than 1% of participants taking 5000 IU/day achieved a serum level of 100 ng/ml or higher, while 82% achieved a level of at least 40 ng/ml.

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An additional chart is available to allow an individual to factor in their weight to calculate the same percentages, based on IU per pound.

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Note: The red line at the top highlights the demonstrated level at which toxicity as measured by hypercalcemia may occur, 200 ng/ml; a level which is difficult to achieve with the doses referenced on the charts.

With the above charts to reference, an individual or physician can make a decision about what dose to try with the most comfortable results. Adjusted doses, however, will be based on the individual’s vitamin D test data.

Are you dosing according to your serum level?

Make sure you are using the correct dose of vitamin D by first knowing your level – and see if you are in the target range of 40-60 ng/ml (100-150 nmol/L). Find out your levels today! Log on to the shop (click the link below) to get your tests and see for yourself if your levels can be improved. Use coupon code SunMonth to receive 15% off plus free shipping during Sunshine Month only!

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

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How can I track my sun exposure and my vitamin D levels?

To help you track your sun exposure and nutrient levels, GrassrootsHealth has created an online tracking system called myData-myAnswers. You can also track your supplemental and dietary nutrient intake to see how they impact your nutrient levels. Check it out today!

How Can You Use this Information for YOUR Health?

Having and maintaining healthy vitamin D and other nutrient levels can help improve your health now and for your future. Measuring is the only way to make sure you are getting enough!

STEP 1 Order your at-home blood spot test kit to measure vitamin D and other nutrients of concern to you, such as omega-3s, magnesium, essential and toxic elements (zinc, copper, selenium, lead, cadmium, mercury); include hsCRP as a marker of inflammation or HbA1c for blood sugar health

STEP 2 Answer the online questionnaire as part of the GrassrootsHealth study

STEP 3 Using our educational materials and tools (such as our dose calculators), assess your results to determine if you are in your desired target range or if actions should be taken to get there

STEP 4 After 3-6 months of implementing your changes, re-test to see if you have achieved your target level(s)

Enroll in D*action and Build Your Custom Test Kit!