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Most S. Calif lifeguards have good level of vitamin D (above 40 ng) - Aug 2016

From Aug 18 email
GrassrootsHealth tested the vitamin D serum levels of a group of Southern California Beach Lifeguards at the end of summer. As shown in the chart below, the majority of the lifeguards (69%) had 25(OH)D concentrations ≥40 ng/ml. All of the lifeguards reported not taking any vitamin D supplements.
California Lifeguards above 40 nanograms VDW # 7744


See also VitaminDWiki

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Evolution seems to indicate a vitamin D level of 45-60 ng
Vitamin D vs Race at is.gd/vitD_race
click on image for details

Short url = https://is.gd/CALifeguards

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