In the News
Monday, September 9, 2019
Tanning as a Source of Vitamin D
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Two different research groups conclude the US RDA is off by an order of magnitude
GrassrootsHealth scientists and staff have published a research letter, citing the D*action data, calling for the Institute of Medicine (IOM) to increase its current vitamin D recommended dietary allowance (RDA) from 600 IU/day to 7,000 IU/day from all sources. |
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Thursday, September 5, 2019
Effect of BMI on Vitamin D Dose-Response
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Evidence shows that vitamin D levels are affected by obesity. Using the data you provided for the GrassrootsHealth study, we assessed the effect of BMI on vitamin D dose-response.
We found that with increasing BMI, the vitamin D level associated with a given supplement dose was lower. |
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