Recent, groundbreaking medical research has made a connection between Vitamin D deficiency and 17 types of cancers, including breast, colon, and prostate. Illnesses such as influenza, diabetes, multiple sclerosis, and coronary heart disease have also been connected to a lack of this vitamin. Now, Dr. Soram Khalsa reveals how to recognize signs of Vitamin D deficiency, which has reached epidemic proportions in North America, and then how to normalize Vitamin D levels for your optimal health.