Less Pain with Vitamin D?
As many of you know, those participating in the D*action project complete a comprehensive health questionnaire, which is required along with each testing sequence. This data allows us to analyze and report how vitamin...
Upper Level Intakes and Risk of Toxicity
When taking and/or prescribing higher doses of vitamin D, it might be useful to know the likelihood of achieving a vitamin D serum level on the higher end of the 25(OH)D serum level spectrum,...
New Sponsors for Health!
Are your friends, family, businesses, customers suffering from vitamin D deficiency? The probability is that at least 60-80% of them are! We have found a way to add a lot of new sponsors at...
How much time do GrassrootsHealth participants spend in the mid-day sun?
Since we know that sun exposure is an important factor in the natural synthesis of vitamin D, we ask our D*action participants a few questions about their sun habits. In each questionnaire, participants are...
Are You Still Suffering from Winter Lows?
Have you tested your vitamin D lately? You may still be affected by deficiency resulting from this past winter! The chart below demonstrates the profound influence that season can have on vitamin D levels...
Are vitamin D levels increasing in the United States population?
The results of a study comparing vitamin D levels in 1998-2000 vs. 2009-2011 among middle-aged women participating in the Study of Women’s Health Across the Nation (SWAN) were published this month (April 2019) in...
What happens to the vitamin D we take or make?
Vitamin D has many uses in the body and comes from many sources. In previous blogs, we have discussed how to increase vitamin D levels by getting vitamin D from food, supplements, and sun....
Addressing a Common Misconception about Vitamin D
At GrassrootsHealth, one of our goals is to provide information about the importance of maintaining a vitamin D blood level of 40-60 ng/ml, as recommended by our panel of 48 international vitamin D scientists....
Lower Risk of Colorectal Cancer Progression with Vitamin D – the SUNSHINE Trial
Results from the SUNSHINE trial, a randomized clinical trial testing whether vitamin D supplementation improves outcomes in advanced or metastatic colorectal cancer patients, was published last week (April 9, 2019) in JAMA. In this...
Did vitamin D supplementation cause kidney failure in a 54 year old man?
A recent case report in the Canadian Medical Association Journal about a man with kidney failure has been picked up by many news sources as a warning against vitamin D supplementation. Was vitamin D...