David Hoffmann has been a phytotherapist for over 35 years and is the author of fifteen books including The Holistic Herbal, An Elders Herbal, An Herbal Guide to Stress Relief and Therapeutic Herbalism, and a textbook on science and clinical skills. David is an internationally renowned medical herbalist. He was a founding member and past president of the American Herbalists Guild, serves on the advisory boards of both the American Botanical Council and United Plant Savers, is a visiting faculty member of Bastyr University, and teaches at the California School of Herbal Studies. David has presented at several of our herbal medicine conferences.