8 Facts About Vitamin D and Rheumatoid Arthritis
By Lene Andersen

1 Billion People Worldwide Do Not Get Enough Vitamin D

1 Billion People Worldwide Do Not Get Enough Vitamin D

And 70 percent of children and adults in the US are vitamin D deficient. The cause of deficiency is a combination of not enough sun exposure, and a diet low in vitamin D.

By Lene Andersen— Last Modified: 12/24/2012, First Published: 08/09/2011