You may have heard that taking vitamin C can help you feel better if you take it when you start getting sick. But did you know how vitamin C works in your body? In the second episode of a series with nutrition scientist Dr. Parris Kidd, supplement class is in session. Dr. Kidd, along with Dr. Daniel and Tana Amen, describe the role vitamin C plays in our immune system, and why it's so important for us to ensure our body has the proper levels of vitamin C to fight off illness and infection.