Robert Dale Rogers has studied plant and mushroom medicine for nearly 50 years. He is a professional member of the American Herbalist Guild, and an assistant clinical professor in family medicine at the University of Alberta.He is the author of over fifty books on natural medicine, including The Fungal Pharmacy: The Complete Guide to Medicinal Mushrooms and Lichens of North America (2011); Medicinal Mushrooms:The Human Clinical Trials (2020); and Psilocybin Mushrooms: The Mystery, Science and Research (2021).Robert was previously on the editorial board of The International Journal of Medicine Mushrooms, and past chair of the Medicinal Mushroom committee of NAMA. He occasionally writes for Fungi magazine, consults in the functional food and nutraceutical industry, presents at conferences, and conducts walks and talks in North America and Europe.