Vitamin D supplements come in a variety of types including liquid-filled capsules, powder-filled capsules, pills, and drops or sprays. On the GrassrootsHealth health and lifestyle questionnaire, questions about which vitamin D supplements participants used...
On the GrassrootsHealth health and lifestyle questionnaire, participants were asked about any extra-large vitamin D doses in the prior 2 months starting in 2017. Participants may take these extra-large doses that replace or are...
On the GrassrootsHealth health and lifestyle questionnaire, questions about which vitamin D supplements participants used were added in 2017. Of the participants who have answered these questions, 86% report taking at least one vitamin...
CITIZEN SCIENCE–it’s time! Please note the press release below about the new claim the FDA has allowed to be added to vitamin D supplements: Pregnant women who have higher serum vitamin D levels have...
There are two main pathways in which vitamin D impacts health after it enters the body from UV exposure or diet. First, vitamin D can be delivered to the liver where it is converted...
In this blog series we are taking a look at the characteristics of the over 13,000 GrassrootsHealth participants worldwide. In earlier posts we showed the demographics, BMI and physical activity, and smoking and alcohol...
For our final post of the series on Cold and Flu Season is Approaching, we will be focusing on what else, besides vitamin D, might help decrease the risk of getting a cold or...
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....
One of the questions we have received from our D*action participants is “Are vitamin D sprays as effective as other forms taken by mouth, such as pills and capsules?” This is a concern especially...
As we saw in earlier posts of this series, GrassrootsHealth participants reside in 55 countries worldwide and vitamin D levels vary by location. Today, we’ll look at how vitamin D supplemental intake varies by...