David Winston’s program has exceeded my expectations as a student. The online program makes me feel as if I’m actually in class, with access to a chat room, the ability to ask questions, and good tech support. David’s wealth of knowledge and willingness to share his experience provides a solid foundation for anyone who has an interest in herbal medicine. The materia medica of more than 300 herbs is extremely thorough and an invaluable reference. David not only gives us an understanding of the herbs themselves, but of physiology, how the energetics of the body and herbs work, and reviews of pertinent clinical studies throughout the program. And above all, David has taught us that good herbalists treat people, not diseases.