John J. Cannell, MD, and Executive Director of Vitamin D Council, talks about vitamin D and the impact this hormone has on health. Dr. Cannell discusses the potential link between low vitamin D levels and autism. If you are hoping to conceive (both men and women), are pregnant, or have a young infant or small child at home, you'll want to listen to this interview.

Dr. Cannell also gives recommendations on which of the two vitamin D blood tests to have your doctor use when checking your level, and also advises on how much vitamin D most of us typically need to maintain a healthy level.

Additional information on Vitamin D can be found at www.vitamindcouncil.org.