WRITTEN BY Nancy A. Palermo, MD There is a lot of talk about Vitamin D deficiency and rightfully so. This deficiency affects more than half of all Americans and it may be linked to many medical conditions that include some cancers, heart disease, hypertension, depression, diabetes, fibromyalgia, bone loss, and even Multiple Sclerosis. It is believed that up to 70 percent of our children also are deficient. In the past, health care providers had believed that Vitamin D was essential to the …