David Hoffmann has been a clinical phytotherapist for almost 20 years. He is one of the founding members and a past president of the American Herbalists Guild. He is on the advisory board of the American Botanical Council, the peer-review boards of Herbalgram and the Protocol Journal of Botanical Medicine, and the steering committee of the American Herbal Pharmacopoea. He is the author of 17 books, including Storey's Healthy Heart, Easy Breathing, Healthy Bones & Joints, and Healthy Digestion. Some of his other publications include The New Holistic Herbal, The Herb Users Guide, and Herbs to Relieve Stress. David also teaches phytotherapy throughout the world, including places such as Australia, New Zealand and Canada. He is visiting faculty at Bastyr University, The California Institute of Integral Studies, the National College of Phytotherapy, and the Rocky Mountain School of Botanical Studies. He resides in Santa Rosa, California.