Some of you may have noticed that your vitamin D blood spot cards from GrassrootsHealth now have a place to enter the time of blood collection. Why is this information important? Earlier this year...
When it comes to how vitamin D supplementation affects vitamin D serum levels, it is important to recognize the wide range of serum level responses that can be produced at any specific supplementation amount....
As we saw in an earlier post, vitamin D levels vary by location among GrassrootsHealth participants. In addition to vitamin D testing, more than 1,800 participants have also measured their Omega-3 Index using the...
As we saw in an earlier post of this series, GrassrootsHealth participants reside in 55 countries worldwide with over 1,000 residing in Canada (the country with the largest number of participants after the United...
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...
Omega-3 fatty acids are a healthy type of fat that comes in multiple forms. Long-chain omega-3s, primarily EPA and DHA which are found in fish and shellfish, have been linked to numerous health benefits....
As we saw in the first of this series, GrassrootsHealth participants reside in 55 countries worldwide. Today, we’ll look at how vitamin D levels vary by location. Vitamin D levels by country for GrassrootsHealth...
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...
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...
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...