By Dr. Mercola
By Dr. Mercola
Without a doubt, one of the most important nutrients for optimal health is vitamin D. But questions still remain about just how much is needed. Dr. Robert Heaney M.D., is one of the premier vitamin D researchers in the world.
He’s also the research director of GrassrootsHealth, headed by Carole Baggerly, which is compiling data from a number of population-based studies like the D*Action project, which many of my readers are participants in.
What is clear is that the recommended dietary allowance (RDA) should really be 10 to 15 times what the Institute of Medicine (IOM) recommends.
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