D2 vs. D3 – What is the Difference?
This topic may be old news to those of you who have been following GrassrootsHealth for some time, but it is still a common question we receive from others who are new to vitamin...
Update on the Vitamin D Testing and Supplementation Program at MUSC (Part 2)
In September 2015, the Medical University of South Carolina (MUSC) initiated a new standard of care for pregnant women that included routine vitamin D testing and supplementation to reduce preterm birth. Results from year...
Editorial: MS — What’s the Scandal?
When I was 10, I had a friend who was a terrific playmate and fellow canyon explorer. We’ll call him Tom. He had a suspicious streak in him. He told me he thought that...
Science Speaks: What is a U-shaped or a J-shaped curve?
Every now and again, we see a study showing a “U-shaped” or “J-shaped” curve in relation to vitamin D status. Today we are going to explore a bit about what that means. What is...
How to Start with Vitamin D
Today we wanted to give you a blog that is meant for someone new to vitamin D. For most of you on our subscription this is old news – so we ask for you...
Does your age affect your vitamin D level?
In today’s blog, we revisit a previous analysis of the D*action cohort for more of Your Data, Your Answers. We analyze the data many different ways, and this month we wanted to show you...
How Much is Too Much Vitamin D?
How to evaluate articles stating “too much vitamin D” causes health problems A 2017 paper published by Kimball et al. is an excellent paper to refer to, when many news outlets continue to purport...
Intake vs Serum Level – What’s more important?
There was a song that was on a 78 record that I had as a child, The Churkendoose (yes, I’m really that old..) Well It depends upon, begins and ends upon, It depends on...
Science Speaks: Do vitamin D levels fluctuate throughout the day?
Published yesterday in the Journal of Medical Case Reports is a new paper from GrassrootsHealth. Titled “25-Hydroxyvitamin D variability within-person due to diurnal rhythm and illness: a case report,” the objective of this study...
Science Speaks: What is magnesium and what function does it perform in the body?
In previous blogs we discussed why magnesium is important for vitamin D levels and how co-nutrients work together for optimal health, such as magnesium, calcium, protein, and vitamin D for bone health. This blog...