Vitamin D levels in US: percent having more than 40 ng doubled (2001-2010)
From GrassrootsHealth
"Twice as many U.S. adults have vitamin D levels ≥40 ng/ml in
2009/2010 (11.3%) compared to
2001/2002 (5.7%)."
89% of U.S. adults still have < 40 nanograms. (as of 2010)
Data has been adjusted to account for different testers used over the decade
* Is 50 ng of vitamin D too high, just right, or not enough
* Vitamin D more than 40 ng: 1300 IU 50% chance: 5,000 IU 80% chance - Aug 2014
* A group of 6,000 people have vitamin D levels higher than 50 ng – GrassrootsHealth
1. Increased use of D has the following
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