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

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.

See also VitaminDWiki

• Is 50 ng of vitamin D too high, just right, or not enough

• Vitamin D (40-70 ng) in Children’s Health – review Sept 2014

• A group of 6,000 people have vitamin D levels higher than 50 ng – GrassrootsHealth

• Hawaiians had a mean of 51 ng and a high of 140 ng

• Farmers in India have 2.5 times higher vitamin D than office workers – 2016

• Great Vitamin D webinar for doctors - Plotnikoff Nov 2013 has a chart of Vitamin D levels who are outdoors a lot

Evolution seems to indicate a vitamin D level of 45-60 ng

click on image for details

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