Ancestral Vitamin D Levels – Should This Be Our Target?
What were ancestral levels of vitamin D? Should we aim for those same levels today? They were 46 ng/ml and higher in pregnant women!
Can You Get Adequate Vitamin D From Food?
GrassrootsHealth research on the food sources for vitamin D. Conclusion is that it is very hard to get enough vitamin D from food.
Are Americans Taking Too Much Vitamin D?
Find information to help refute news articles that say that Americans are taking too much vitamin D. Statements are backed by research, not hyperbole.
Vitamin D Testing Reduces Healthcare Costs
A study was done at 6 VA centers - the number of vitamin D tests and % deficiency were important factors in reducing healthcare costs.
Explanation of Current US RDA for Vitamin D
What is an RDA? Who sets the standards? The National Academy of Sciences (NAS) is a private, non-profit institution comprised of scholars in various scientific fields, most of whom donate their time. It was...
The Real RDA for Vitamin D is 10 Times Higher Than Currently Recommended
Dr. Robert Heaney†, former research director for GrassrootsHealth, was interviewed by Dr. Joseph Mercola about the current US RDA for vitamin D. Most vitamin D researchers disagree with the current RDA, citing it is...
Robert Heaney – In Memorium
August 8, 2016 Dr. Robert Heaney left us on August 6, 2016. In this newsletter we have provided some information about his accomplishments for you to look at below. We’d truly love to have...
Evidence and Action – A Summary
July 27, 2016 We can no longer wait to implement vitamin D programs in all walks of medicine – pregnancy, pediatrics, adult physicals, and disease treatment. Our disease incidence prevention chart gives a view...
Evidence and Action – Cancer
July 20, 2016 Almost all vitamin D researchers point to the iconic research of the Garland brothers as the beginning of research on vitamin D and cancer. It centers on the map below, which...
Evidence and Action – Interpreting Results
July 13, 2016 It is hard to know what to do with nutrient related information these days. Is it correct? Would it help your health condition? With any nutrient, including vitamin D, you could...