Summary: Dr. Eric Berg DC explains the underlying real reasons why many people are showing low in their vitamin D levels. It's not just a lack of sunlight. http://www.drberg.com/body-type-quiz?source=youtube
Summary: Dr. Eric Berg DC explains the underlying real reasons why many people are showing low in their vitamin D levels. It's not just a lack of sunlight. http://www.drberg.com/body-type-quiz?source=youtube