Today on Health & Longevity, Dr. John Westerdahl features Part 2, and the conclusion of a two-part series on the topic of Medicinal Herbs and Herbal Supplements. Dr. Westerdahl discusses traditional and popular medicinal herbs that can contribute to your health and longevity. He discusses the science and research pertaining to important plant-based medicines. Dr. Westerdahl is the author of the booklet, 'Medicinal Herbs - A Vital Reference Guide.'