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Variability Among Magnesium Products

In a previous post, we discussed several different forms of magnesium found in supplements, and which were the most popular among GrassrootsHealth participants. Each form consists of a magnesium molecule or ion attached to...

Is Your Vitamin D Level Too High?

We sometimes receive questions from participants about whether a vitamin D test result is too high if it came back higher than the recommended range of 40-60 ng/ml. In this blog we will explore...

Vitamin D Testing Reduces Healthcare Costs

Researchers in Tennessee believed that vitamin D deficiency could lead to chronic ailments, which in turn increases health care costs. The Veterans Administration is interested not only in the health of their veterans, but...

Effect of BMI on Vitamin D Dose-Response

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...