Special guest post by William B. Grant, PhD, a recognized “World Expert” in the top 0.1% of scholars writing about Sunlight over the past 10 years The evidence supporting the role of moderate sun...
Video Friday: Dr. John Campbell reviews the scientific evidence to determine if supplementing with vitamin K2 with vitamin D is absolutely necessary Key Points Vitamin K2 (called menaquinones) is mostly bacterial in origin, and...
Video Friday: The math and science used to determine recommended vitamin D serum levels and supplementation amounts, and where the IOM got it wrong It’s Video Friday! Today’s video titled What Serum Level Should...
Video Friday: Vitamin D and COVID 19: The Evidence for Prevention and Treatment of Coronavirus (SARS CoV 2) It’s Video Friday! Today’s video is a bit longer than what we have previously shared, but...
What to consider when headlines claim no benefit for vitamin D in bone health, falls and fractures Whenever a study comes out that questions the known benefits of vitamin D the press reports it...
Insight on how GrassrootsHealth collects data, why we collect the data we do, how it is used to help you with your health decisions and to move research into practice Becoming a participant of...
What’s the best nutrient level for health? Lab test results often come with a set of numbers next to the result called a “reference range.” What does this mean, and does it represent the...
A secondary analysis of the VITAL trial results found a decreased risk of advanced cancer with vitamin D supplementation with normal BMI Vitamin D has known anticancer effects, and much research has been published...
Studies and Statistics Part 4: Cohort Studies There are many different types of nutrient research studies, including randomized controlled trials (covered in a recent post), cohort studies, case-control studies, and cross-sectional studies. In this...
What is a randomized controlled trial, and is it the best type of research for the effect of nutrients on health outcomes? There are many different types of nutrient research studies, including randomized controlled...