Why is Vitamin D Deficiency So High? It’s Not Lack of Sun

We don’t often think about whether we’re getting enough vitamin D in the sunnier spring and summer months but we should. That’s because 41.6 percent of all Americans and 1 billion people worldwide are believed to be deficient in vitamin D, causing some researchers to refer to the situation as the “ignored epidemic.” Blacks and […]

Excerpt from https://www.care2.com/greenliving/why-is-vitamin-d-deficiency-so-high-its-not-lack-of-sun.html